map Method in JavaScript Tutorial - 5 ways to use it in 2022 ✅ | array map method in javascript
Learn about the map function in JavaScript ES6 with easy examples in a tutorial for beginners and advanced to make you understand it and also have some fun at the same time!
Map method is extremely used by the javascript react community because we can transform the json data into react components, into html elements that we can use to render them on the screen. I will also show you an example.
map calls a provided callbackFn function once for each element in an array, in order, and constructs a new one from the results. callbackFn is invoked only for indexes which have assigned values (including undefined). I will show you with easy and practical examples how to use this.
In the end I will challenge you to tell me what will be displayed on an array with numbers as string and the parseInt as a callback.
Programming can be difficult and Javascript can be hard sometimes, but if you find good resources you can understand anything very fast. Also a good tutorial will give you a great experience.
Thanks for watching!
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Timestamps:
00:00 - Basics
01:37 - Map Beginner Trap
02:16 - Undefined if the condition is not met
03:42 - The Second Argument
04:15 - Promises
05:00 - React
05:37 - Challenge and Solution
Resources:
https://developer.mozilla.org/en-US/d...
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