Javascript

Understanding Map and Set Objects in JavaScript — step-by-step Javascript tutorial on Progressive Robot

Understanding Map and Set Objects in JavaScript

Introduced in ECMAScript 2015, Maps in JavaScript are ordered collections of key/value pairs, and Sets are collections of unique values. In this article, you will go over the Map and Set objects, what makes them similar or different to Objects and Arrays, the properties and methods available to them, and examples of some practical uses.

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