const Redis = require("ioredis");

const redis = new Redis();

async function main() {

const user = {

name: "Bob",

// The value of a Redis key can not be a number.

// We can write `age: 20` here but ioredis will convert it to a string anyway.

age: "20",

description: "I am a programmer",

};

await redis.mset(user);

const name = await redis.get("name");

console.log(name); // "Bob"

const age = await redis.get("age");

console.log(age); // "20"

const all = await redis.mget("name", "age", "description");

console.log(all); // [ 'Bob', '20', 'I am a programmer' ]

// or `await redis.del("name", "description")`;

await redis.del(["name", "description"]);

const exists = await redis.exists("name");

console.log(exists); // 0 (means false, and if it's 1, it means true)

await redis.incrby("age", 1);

const newAge = await redis.get("age");

console.log(newAge); // 21

await redis.set("key_with_ttl", "hey", "EX", 1000);

const ttl = await redis.ttl("key_with_ttl");

console.log(ttl); // a number smaller or equal to 1000

}

main();