vannucci-dev
4/20/2020 - 2:26 PM

Map

A Map object iterates its elements in insertion order — a for...of loop returns an array of [key, value] for each iteration.

app.js
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const array = [1, 2, 3, 4];

const mapArray = array.map(num=>num*2);
console.log(mapArray); // mapArray = [2, 4, 6, 8];