Array flatMap() method in JavaScript! - New in Chrome Update 69

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In this video we take a look at how to use flatMap() and how it compares to the regular map() method.

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Комментарии
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One really cool thing about the flatMap method is the ability to 1: remove elements, 2: change (or keep) elements, and 3: add elements, all in one loop iteration.

For 1: simply return an empty array.
For 2: simply return an array with the element and whatever transformation you want.
For 3: simply return an array with the current element, and then a comma and the new element you want to add.

So it’s like Array.map and Array.filter baked into one.👌🏻

dawid_dahl
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Can you please create a playlist without the dom videos. The reason i ask is that your js all playlist is really long and it puts people off while also some of the videos are from the dom playlist. A seperate playlist containing only none dom & web develomment js videos would really help. Thank you

yamacode
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How to sum more than two elements in an multi dimensional array using flatMap method? Thanks

razvanbugoi