SADD

import redis

r = redis.Redis(decode_responses=True)

res1 = r.sadd("myset", "Hello", "World")
print(res1)  # >>> 2

res2 = r.sadd("myset", "World")
print(res2)  # >>> 0

res3 = r.smembers("myset")
print(res3)  # >>> {'Hello', 'World'}


res4 = r.sadd("myset", "Hello", "World")
print(res4)  # >>> 2

res5 = r.smembers("myset")
print(res5)  # >>> {'Hello', 'World'}

import { createClient } from 'redis';

const client = createClient();
await client.connect().catch(console.error);

const res1 = await client.sAdd('myset', ['Hello', 'World']);
console.log(res1);  // 2

const res2 = await client.sAdd('myset', ['World']);
console.log(res2);  // 0

const res3 = await client.sMembers('myset')
console.log(res3);  // ['Hello', 'World']


const res4 = await client.sAdd('myset', ['Hello', 'World']);
console.log(res4);  // 2

const res5 = await client.sMembers('myset')
console.log(res5);  // ['Hello', 'World']


await client.close();

import static java.util.stream.Collectors.toList;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;

import java.util.Set;

import redis.clients.jedis.UnifiedJedis;

public class CmdsSetExample {

    public void run() {
        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");

        long sAddResult1 = jedis.sadd("myset", "Hello");
        System.out.println(sAddResult1); // >>> 1

        long sAddResult2 = jedis.sadd("myset", "World");
        System.out.println(sAddResult2); // >>> 1

        long sAddResult3 = jedis.sadd("myset", "World");
        System.out.println(sAddResult3); // >>> 0

        Set<String> sAddResult4 = jedis.smembers("myset");
        System.out.println(sAddResult4.stream().sorted().collect(toList()));
        // >>> [Hello, World]

        long sMembersResult1 = jedis.sadd("myset", "Hello", "World");
        System.out.println(sMembersResult1); // >>> 2

        Set<String> sMembersResult2 = jedis.smembers("myset");
        System.out.println(sMembersResult2.stream().sorted().collect(toList()));
        // >>> [Hello, World]

        jedis.close();
    }
}

package example_commands_test

import (
	"context"
	"fmt"

	"github.com/redis/go-redis/v9"
)


func ExampleClient_sadd_cmd() {
	ctx := context.Background()

	rdb := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "", // no password docs
		DB:       0,  // use default DB
	})


	sAddResult1, err := rdb.SAdd(ctx, "myset", "Hello").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sAddResult1) // >>> 1

	sAddResult2, err := rdb.SAdd(ctx, "myset", "World").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sAddResult2) // >>> 1

	sAddResult3, err := rdb.SAdd(ctx, "myset", "World").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sAddResult3) // >>> 0

	sMembersResult, err := rdb.SMembers(ctx, "myset").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sMembersResult) // >>> [Hello World]

}

func ExampleClient_smembers_cmd() {
	ctx := context.Background()

	rdb := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "", // no password docs
		DB:       0,  // use default DB
	})


	sAddResult, err := rdb.SAdd(ctx, "myset", "Hello", "World").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sAddResult) // >>> 2

	sMembersResult, err := rdb.SMembers(ctx, "myset").Result()

	if err != nil {
		panic(err)
	}

	fmt.Println(sMembersResult) // >>> [Hello World]

}

using StackExchange.Redis;

public class CmdsSetExample
{
    public void Run()
    {
        var muxer = ConnectionMultiplexer.Connect("localhost:6379");
        var db = muxer.GetDatabase();

        bool sAddResult1 = db.SetAdd("myset", "Hello");
        Console.WriteLine(sAddResult1); // >>> True

        bool sAddResult2 = db.SetAdd("myset", "World");
        Console.WriteLine(sAddResult2); // >>> True

        bool sAddResult3 = db.SetAdd("myset", "World");
        Console.WriteLine(sAddResult2); // >>> False

        RedisValue[] sAddResult4 = db.SetMembers("myset");
        Array.Sort(sAddResult4);
        Console.WriteLine(string.Join(", ", sAddResult4));
        // >>> Hello, World

        long sMembersResult1 = db.SetAdd(
            "myset", ["Hello", "World"]
        );
        Console.WriteLine(sMembersResult1); // >>> 2

        RedisValue[] sMembersResult2 = db.SetMembers("myset");
        Array.Sort(sMembersResult2);
        Console.WriteLine(string.Join(", ", sMembersResult2));
        // >>> Hello, World
    }
}

<?php

require 'vendor/autoload.php';

use Predis\Client as PredisClient;

class CmdSetTest
{
    public function testCmdSet() {
        $r = new PredisClient([
            'scheme'   => 'tcp',
            'host'     => '127.0.0.1',
            'port'     => 6379,
            'password' => '',
            'database' => 0,
        ]);

        $res1 = $r->sadd('myset', ['Hello', 'World']);
        echo $res1 . PHP_EOL;
        // >>> 2

        $res2 = $r->sadd('myset', ['World']);
        echo $res2 . PHP_EOL;
        // >>> 0

        $res3 = $r->smembers('myset');
        sort($res3);
        echo json_encode($res3) . PHP_EOL;
        // >>> ["Hello","World"]

        $res4 = $r->sadd('myset', ['Hello', 'World']);
        echo $res4 . PHP_EOL;
        // >>> 2

        $res5 = $r->smembers('myset');
        sort($res5);
        echo json_encode($res5) . PHP_EOL;
        // >>> ["Hello","World"]
    }
}