Redis 集合

Redis 集合简介

Redis 集合是唯一字符串（成员）的无序集合。您可以使用 Redis 集合来有效地

跟踪唯一项目（例如，跟踪访问给定博客文章的所有唯一 IP 地址）。
表示关系（例如，具有给定角色的所有用户的集合）。
执行常见的集合操作，例如交集、并集和差集。

基本命令

SADD 将新成员添加到集合中。
SREM 从集合中删除指定的成员。
SISMEMBER 测试字符串是否属于集合。
SINTER 返回两个或多个集合共有的成员集（即交集）。
SCARD 返回集合的大小（也称为基数）。

查看完整的集合命令列表。

示例

存储在法国和美国比赛的自行车集合。请注意，如果您添加已经存在的成员，它将被忽略。

>_ Redis CLI

> SADD bikes:racing:france bike:1
(integer) 1
> SADD bikes:racing:france bike:1
(integer) 0
> SADD bikes:racing:france bike:2 bike:3
(integer) 2
> SADD bikes:racing:usa bike:1 bike:4
(integer) 2

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

检查 bike:1 或 bike:2 是否在美国比赛。

>_ Redis CLI

> SISMEMBER bikes:racing:usa bike:1
(integer) 1
> SISMEMBER bikes:racing:usa bike:2
(integer) 0

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

哪些自行车在两场比赛中都参加了比赛？

>_ Redis CLI

> SINTER bikes:racing:france bikes:racing:usa
1) "bike:1"

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

法国有多少辆自行车参加比赛？

>_ Redis CLI

> SCARD bikes:racing:france
(integer) 3

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

教程

The SADD command adds new elements to a set. It's also possible to do a number of other operations against sets like testing if a given element already exists, performing the intersection, union or difference between multiple sets, and so forth.

>_ Redis CLI

> SADD bikes:racing:france bike:1 bike:2 bike:3
(integer) 3
> SMEMBERS bikes:racing:france
1) bike:3
2) bike:1
3) bike:2

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

我已经在我的集合中添加了三个元素，并告诉 Redis 返回所有元素。集合没有顺序保证。Redis 可以自由地在每次调用时以任何顺序返回元素。

Redis 有命令可以测试集合成员资格。这些命令可以用于单个项目和多个项目。

>_ Redis CLI

> SISMEMBER bikes:racing:france bike:1
(integer) 1
> SMISMEMBER bikes:racing:france bike:2 bike:3 bike:4
1) (integer) 1
2) (integer) 1
3) (integer) 0

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

我们还可以找到两个集合之间的差异。例如，我们可能想知道哪些自行车在法国比赛，但在美国没有比赛。

>_ Redis CLI

> SADD bikes:racing:usa bike:1 bike:4
(integer) 2
> SDIFF bikes:racing:france bikes:racing:usa
1) "bike:3"
2) "bike:2"

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

还有其他非平凡的操作，使用正确的 Redis 命令仍然很容易实现。例如，我们可能想要一个在法国、美国和其他一些比赛中比赛的所有自行车的列表。我们可以使用 SINTER 命令来完成此操作，该命令执行不同集合之间的交集。除了交集，您还可以执行并集、差集等等。例如，如果我们添加第三场比赛，我们可以看到其中一些命令在运行。

>_ Redis CLI

> SADD bikes:racing:france bike:1 bike:2 bike:3
(integer) 3
> SADD bikes:racing:usa bike:1 bike:4
(integer) 2
> SADD bikes:racing:italy bike:1 bike:2 bike:3 bike:4
(integer) 4
> SINTER bikes:racing:france bikes:racing:usa bikes:racing:italy
1) "bike:1"
> SUNION bikes:racing:france bikes:racing:usa bikes:racing:italy
1) "bike:2"
2) "bike:1"
3) "bike:4"
4) "bike:3"
> SDIFF bikes:racing:france bikes:racing:usa bikes:racing:italy
(empty array)
> SDIFF bikes:racing:france bikes:racing:usa
1) "bike:3"
2) "bike:2"
> SDIFF bikes:racing:usa bikes:racing:france
1) "bike:4"

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

您会注意到，当所有集合之间的差为空时，SDIFF 命令返回一个空数组。您还会注意到，传递给 SDIFF 的集合顺序很重要，因为差集不是可交换的。

当您要从集合中删除项目时，可以使用 SREM 命令从集合中删除一个或多个项目，或者可以使用 SPOP 命令从集合中删除一个随机项目。您还可以使用 SRANDMEMBER 命令从集合中返回一个随机项目，而不会删除它。

>_ Redis CLI

> SADD bikes:racing:france bike:1 bike:2 bike:3 bike:4 bike:5
(integer) 5
> SREM bikes:racing:france bike:1
(integer) 1
> SPOP bikes:racing:france
"bike:3"
> SMEMBERS bikes:racing:france
1) "bike:2"
2) "bike:4"
3) "bike:5"
> SRANDMEMBER bikes:racing:france
"bike:2"

Python

"""
Code samples for Set doc pages:
    https://redis.ac.cn/docs/latest/develop/data-types/sets/
"""

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("bikes:racing:france", "bike:1")
print(res1)  # >>> 1

res2 = r.sadd("bikes:racing:france", "bike:1")
print(res2)  # >>> 0

res3 = r.sadd("bikes:racing:france", "bike:2", "bike:3")
print(res3)  # >>> 2

res4 = r.sadd("bikes:racing:usa", "bike:1", "bike:4")
print(res4)  # >>> 2


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res5 = r.sismember("bikes:racing:usa", "bike:1")
print(res5)  # >>> 1

res6 = r.sismember("bikes:racing:usa", "bike:2")
print(res6)  # >>> 0


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
res7 = r.sinter("bikes:racing:france", "bikes:racing:usa")
print(res7)  # >>> ['bike:1']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
res8 = r.scard("bikes:racing:france")
print(res8)  # >>> 3


res9 = r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
print(res9)  # >>> 3

res10 = r.smembers("bikes:racing:france")
print(res10)  # >>> ['bike:1', 'bike:2', 'bike:3']


res11 = r.sismember("bikes:racing:france", "bike:1")
print(res11)  # >>> 1

res12 = r.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
print(res12)  # >>> [1, 1, 0]


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")

res13 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res13)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
r.sadd("bikes:racing:usa", "bike:1", "bike:4")
r.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4")

res13 = r.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res13)  # >>> ['bike:1']

res14 = r.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res14)  # >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

res15 = r.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy")
print(res15)  # >>> []

res16 = r.sdiff("bikes:racing:usa", "bikes:racing:france")
print(res16)  # >>> ['bike:4']

res17 = r.sdiff("bikes:racing:france", "bikes:racing:usa")
print(res17)  # >>> ['bike:2', 'bike:3']


r.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")

res18 = r.srem("bikes:racing:france", "bike:1")
print(res18)  # >>> 1

res19 = r.spop("bikes:racing:france")
print(res19)  # >>> bike:3

res20 = r.smembers("bikes:racing:france")
print(res20)  # >>> ['bike:2', 'bike:4', 'bike:5']

res21 = r.srandmember("bikes:racing:france")
print(res21)  # >>> bike:4

Node.js

import assert from 'assert';
import { createClient } from 'redis';

const client = await createClient();
await client.connect();

const res1 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res1)  // >>> 1

const res2 = await client.sAdd('bikes:racing:france', 'bike:1')
console.log(res2)  // >>> 0
const res3 = await client.sAdd('bikes:racing:france', ['bike:2', 'bike:3'])
console.log(res3)  // >>> 2
const res4 = await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
console.log(res4)  // >>> 2


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res5 = await client.sIsMember('bikes:racing:usa', 'bike:1')
console.log(res5)  // >>> true

const res6 = await client.sIsMember('bikes:racing:usa', 'bike:2')
console.log(res6)  // >>> false


await client.del('bikes:racing:france')
await client.del('bikes:racing:usa')
await client.sAdd('bikes:racing:france', 'bike:1', 'bike:2', 'bike:3')
await client.sAdd('bikes:racing:usa', 'bike:1', 'bike:4')
const res7 = await client.sInter('bikes:racing:france', 'bikes:racing:usa')
console.log(res7)  // >>> {'bike:1'}


await client.del('bikes:racing:france')
await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
const res8 = await client.sCard('bikes:racing:france')
console.log(res8)  // >>> 3


const res9 = await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
console.log(res9)  // >>> 3

const res10 = await client.sMembers('bikes:racing:france')
console.log(res10)  // >>> ['bike:1', 'bike:2', 'bike:3']


const res11 = await client.sIsMember('bikes:racing:france', 'bike:1')
console.log(res11)  // >>> true

const res12 = await client.smIsMember('bikes:racing:france', ['bike:2', 'bike:3', 'bike:4'])
console.log(res12)  // >>> [true, true, false]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
const res13 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res13)  // >>> [ 'bike:2', 'bike:3' ]


await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3'])
await client.sAdd('bikes:racing:usa', ['bike:1', 'bike:4'])
await client.sAdd('bikes:racing:italy', ['bike:1', 'bike:2', 'bike:3', 'bike:4'])

const res14 = await client.sInter(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res14)  // >>> ['bike:1']

const res15 = await client.sUnion(
  ['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy']
)
console.log(res15)  // >>> ['bike:1', 'bike:2', 'bike:3', 'bike:4']

const res16 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa', 'bikes:racing:italy'])
console.log(res16)  // >>> []

const res17 = await client.sDiff(['bikes:racing:usa', 'bikes:racing:france'])
console.log(res17)  // >>> ['bike:4']

const res18 = await client.sDiff(['bikes:racing:france', 'bikes:racing:usa'])
console.log(res18)  // >>> ['bike:2', 'bike:3']


debugger;

await client.sAdd('bikes:racing:france', ['bike:1', 'bike:2', 'bike:3', 'bike:4', 'bike:5'])

const res19 = await client.sRem('bikes:racing:france', 'bike:1')
console.log(res19)  // >>> 1

const res20 = await client.sPop('bikes:racing:france')
console.log(res20)  // >>> bike:3 or other random value

const res21 = await client.sMembers('bikes:racing:france')
console.log(res21)  // >>> ['bike:2', 'bike:4', 'bike:5']; depends on previous result

const res22 = await client.sRandMember('bikes:racing:france')
console.log(res22)  // >>> bike:4 or other random value

Java

package io.redis.examples;

import redis.clients.jedis.UnifiedJedis;
import org.junit.Test;
import java.util.List;
import java.util.Set;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class SetsExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
        long res1 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res1);  // >>> 1

        long res2 = jedis.sadd("bikes:racing:france", "bike:1");
        System.out.println(res2);  // >>> 0

        long res3 = jedis.sadd("bikes:racing:france", "bike:2", "bike:3");
        System.out.println(res3);  // >>> 2

        long res4 = jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        System.out.println(res4);  // >>> 2


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        boolean res5 = jedis.sismember("bikes:racing:usa", "bike:1");
        System.out.println(res5);  // >>> true

        boolean res6 = jedis.sismember("bikes:racing:usa", "bike:2");
        System.out.println(res6);  // >>> false


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res7 = jedis.sinter("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res7);  // >>> [bike:1]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");

        long res8 = jedis.scard("bikes:racing:france");
        System.out.println(res8);  // >>> 3


        long res9 = jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        System.out.println(res9);  // >>> 3

        Set<String> res10 = jedis.smembers("bikes:racing:france");
        System.out.println(res10);  // >>> [bike:1, bike:2, bike:3]


        boolean res11 = jedis.sismember("bikes:racing:france", "bike:1");
        System.out.println(res11);  // >>> true

        List<Boolean> res12 = jedis.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4");
        System.out.println(res12);  // >>> [true,true,false]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");

        Set<String> res13 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res13);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3");
        jedis.sadd("bikes:racing:usa", "bike:1", "bike:4");
        jedis.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4");

        Set<String> res14 = jedis.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res14);  // >>> [bike:1]

        Set<String> res15 = jedis.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res15);  // >>> [bike:1, bike:2, bike:3, bike:4]

        Set<String> res16 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy");
        System.out.println(res16);  // >>> []

        Set<String> res17 = jedis.sdiff("bikes:racing:usa", "bikes:racing:france");
        System.out.println(res17);  // >>> [bike:4]

        Set<String> res18 = jedis.sdiff("bikes:racing:france", "bikes:racing:usa");
        System.out.println(res18);  // >>> [bike:2, bike:3]


        jedis.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5");

        long res19 = jedis.srem("bikes:racing:france", "bike:1");
        System.out.println(res18);  // >>> 1

        String res20 = jedis.spop("bikes:racing:france");
        System.out.println(res20);  // >>> bike:3

        Set<String> res21 = jedis.smembers("bikes:racing:france");
        System.out.println(res21);  // >>> [bike:2, bike:4, bike:5]

        String res22 = jedis.srandmember("bikes:racing:france");
        System.out.println(res22);  // >>> bike:4


        jedis.close();
    }
}


using System.Data.Common;
using NRedisStack.Tests;
using StackExchange.Redis;



public class SetsExample
{

    [SkipIfRedis(Is.OSSCluster)]
    public void run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();


        long res1 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res1);    // >>> 1

        long res2 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1" });
        Console.WriteLine(res2);    // >>> 0

        long res3 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3" });
        Console.WriteLine(res3);    // >>> 2

        long res4 = db.SetAdd("bikes:racing:usa", new RedisValue[] { "bike:1", "bike:4" });
        Console.WriteLine(res4);    // >>> 2

        // Tests for 'sadd' step.


        bool res5 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res5);    // >>> True

        bool res6 = db.SetContains("bikes:racing:usa", "bike:2");
        Console.WriteLine(res6);    // >>> False

        // Tests for 'sismember' step.


        long res7 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res8 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });

        RedisValue[] res9 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res9)); // >>> bike:1

        // Tests for 'sinter' step.


        long res10 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res11 = db.SetLength("bikes:racing:france");
        Console.WriteLine(res11);   // >>> 3

        // Tests for 'scard' step.


        long res12 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        RedisValue[] res13 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res13));    // >>> bike:3, bike:2, bike:1

        // Tests for 'sadd_smembers' step.


        bool res14 = db.SetContains("bikes:racing:france", "bike:1");
        Console.WriteLine(res14);   // >>> true

        bool[] res15 = db.SetContains("bikes:racing:france", new RedisValue[] { "bike:2", "bike:3", "bike:4" });
        Console.WriteLine(string.Join(", ", res15));    // >>> True, True, False

        // Tests for 'smismember' step.


        long res16 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res17 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        RedisValue[] res18 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res18));    // >>> bike:2, bike:3

        // Tests for 'sdiff' step.


        long res19 = db.SetAdd("{bikes:racing}:france", new RedisValue[] { "bike:1", "bike:2", "bike:3" });
        long res20 = db.SetAdd("{bikes:racing}:usa", new RedisValue[] { "bike:1", "bike:4" });
        long res21 = db.SetAdd("{bikes:racing}:italy", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4" });

        RedisValue[] res22 = db.SetCombine(SetOperation.Intersect, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res22));    // >>> bike:1

        RedisValue[] res23 = db.SetCombine(SetOperation.Union, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res23));    // >>> bike:1, bike:2, bike:3, bike:4

        RedisValue[] res24 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa", "{bikes:racing}:italy" });
        Console.WriteLine(string.Join(", ", res24));    // >>> <empty set>

        RedisValue[] res25 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:usa", "{bikes:racing}:france" });
        Console.WriteLine(string.Join(", ", res25));    // >>> bike:4

        RedisValue[] res26 = db.SetCombine(SetOperation.Difference, new RedisKey[] { "{bikes:racing}:france", "{bikes:racing}:usa" });
        Console.WriteLine(string.Join(", ", res26));    // >>> bike:2, bike:3

        // Tests for 'multisets' step.


        long res27 = db.SetAdd("bikes:racing:france", new RedisValue[] { "bike:1", "bike:2", "bike:3", "bike:4", "bike:5" });

        bool res28 = db.SetRemove("bikes:racing:france", "bike:1");
        Console.WriteLine(res28);   // >>> True

        RedisValue res29 = db.SetPop("bikes:racing:france");
        Console.WriteLine(res29);   // >>> bike:3

        RedisValue[] res30 = db.SetMembers("bikes:racing:france");
        Console.WriteLine(string.Join(", ", res30));    // >>> bike:2, bike:4, bike:5

        RedisValue res31 = db.SetRandomMember("bikes:racing:france");
        Console.WriteLine(res31);   // >>> bike:4

        // Tests for 'srem' step.


    }
}

限制

Redis 集合的最大大小为 2^32 - 1 (4,294,967,295) 个成员。

性能

大多数集合操作，包括添加、删除和检查项目是否为集合成员，都是 O(1)。这意味着它们非常高效。但是，对于具有数十万个或更多成员的大型集合，在运行 SMEMBERS 命令时应谨慎。此命令为 O(n)，并在单个响应中返回整个集合。作为替代方案，请考虑 SSCAN，它允许您迭代地检索集合的所有成员。

替代方案

大型数据集（或流式数据）上的集合成员资格检查可能会使用大量内存。如果您担心内存使用情况并且不需要完全精确，请考虑使用布隆过滤器或布谷鸟过滤器作为集合的替代方案。

Redis 集合通常用作索引的一种。如果您需要索引和查询数据，请考虑使用 JSON 数据类型和搜索和查询功能。

了解更多

Redis 集合解释和 Redis 集合阐述是两个简短但全面的视频解释器，涵盖了 Redis 集合。
Redis 大学的 RU101 详细探讨了 Redis 集合。

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