You Should Use Maps and Sets in JS

In this video CJ talks about the scenarios when it is better to use Maps and Sets instead of Objects and Arrays in JavaScript. 00:00 Intro 01:09 The problem with Objects 02:41 When to use a Map 03:07 How to use Map 04:34 Create a Map from an Object 04:59 Object Keys are Strings 05:59 Create a Map from an Array 07:02 Map methods are nice 07:45 JSON.stringify a Map 08:53 Sets 09:15 The problem with Array.includes 10:36 Making a Set with an Object 11:50 Create a Set from an Array 12:23 Sets and Duplicate Values 12:58 Set methods on MDN 13:21 Thanks for watching Listen to episode 689 on Syntax: https://syntax.fm/show/689/you-should-be-using-javascript-maps-and-sets Read about Map on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map Read about Set on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set ------------------------------------------------------------------------------ Hit us up on Socials! https://www.syntax.fm/links Brought to you by Sentry, use code tastytreats to get your first 2 months free: https://sentry.io/syntax/ #javascript #webdevelopment #programming #typescript