A collection of helpful tricks on JavaScript

javascript-tricks.js

// Create a Map from an Array
const array = [
  { key: "name", value: "Tom" },
  { key: "country", value: "Chile" },
];

// Return an array of tuples (array with two values, the key and the value)
const map = new Map(array.map((item) => [item.key, object.value]));

// ️👇️ {'name' => 'Tom', 'country' => 'Chile'}
console.log(map);

// Swap two variables in one line (XOR)
let [a, b] = [0, 1];
[a, b] = [b, a];