'use strict';

const timeoutCollection = (interval) => {

const collection = new Map();

const timers = new Map();

const instance = {};

instance.set = (key, value) => {

const timer = timers.get(key);

if (timer) clearTimeout(timer);

const timeout = setTimeout(() => {

collection.delete(key);

}, interval);

timeout.unref();

collection.set(key, value);

timers.set(key, timer);

};

instance.get = (key) => collection.get(key);

instance.delete = (key) => {

const timer = timers.get(key);

if (timer) {

clearTimeout(timer);

collection.delete(key);

timers.delete(key);

}

};

instance.toArray = () => [...collection.entries()];

return instance;

};

// Usage

const hash = timeoutCollection(1000);

hash.set('uno', 1);

console.dir({ array: hash.toArray() });

hash.set('due', 2);

console.dir({ array: hash.toArray() });

setTimeout(() => {

hash.set('tre', 3);

console.dir({ array: hash.toArray() });

setTimeout(() => {

hash.set('quattro', 4);

console.dir({ array: hash.toArray() });

}, 500);

}, 1500);