2.基础概念

const redis = require("redis");

//列表
client.lpush("links", "a", redis.print);
client.lpush("links", "b", redis.print);
client.lrange("links", 0, -1, redis.print);
//集合
client.sadd("tags", "a", redis.print);
//如何在redis中模拟对象操作
client.hset("person", "name", "zfpx", redis.print);
client.hset("person", "age", "10", redis.print);
client.hset("person", "home", "beijing", redis.print);
client.hkeys("person", (err, replies) => {
  console.log(replies);
});

const redis = require("redis");
let client1 = redis.createClient(6379, "localhsot");
let client2 = redis.createClient(6379, "localhost");
let count = 0;
client1.subscribe("channel_a");
client12.subscribe("channel_b");
client1.on("message", (channel, message) => {
  //当收到第一个消息之后，立刻取消订阅频道channel_b,那以后将不再接收频道b发过来的消息
});