Using sorted sets with redis client for NodeJS. In this example I retrieve the list of elements ordered by score in descending order

Sorted sets

var redis = require("redis"),
client = redis.createClient();

// if you'd like to select database 3, instead of 0 (default), call
// client.select(3, function() { /* ... */ });

client.on("error", function (err) {
    console.log("Error " + err);
});

// Crea elementos de score 1 en el conjunto
client.zadd("myzset", 1, "i1");
client.zadd("myzset", 1, "i2");
client.zadd("myzset", 1, "i3");

// Incrementa el primer elemento varias veces
client.zincrby("myzset", 1, "i1");
client.zincrby("myzset", 1, "i1");
client.zincrby("myzset", 1, "i1");
client.zincrby("myzset", 1, "i1");

// Obtiene un rango de elementos ordenados por score de mayor a menor
client.zrevrange("myzset", 0, 10, function (err, list) {
    if (err) throw err;
    console.log("plain range:", list);
});

// Obtiene un rango de elementos, junto con sus scores, ordenados de
// mayor a menor
client.zrevrange("myzset", 0, 10, "withscores", function (err, listwithscores) {
    if (err) throw err;
    console.log("with scores:", listwithscores);
});

client.quit(function (err, res) {
    console.log("Exiting from quit command.");
});