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This article mainly introduces how jJavaScript uses map (). It is very detailed and has certain reference value. Friends who are interested must finish it!

Map ()

The map method is used to traverse an array and has a return value, which can operate on each item of the array and generate a new array, sometimes instead of for and forEach loops, simplifying the code, such as:

Let arr3 = [1,2,3,4,5]; let newArr3 = arr3.map ((e, I) = > e * 10); / / multiply each item in the array by 10console.log (newArr3); / / [10,20,30,40,50] are all the contents of the article "how jJavaScript uses map ()". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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