How to implement Array map method by ES5 in JavaScript
This article will explain in detail how to implement array map in ES5 in JavaScript. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.
Implementation of Array map method with ES5
It is worth mentioning that the second parameter of map is the this point in the first parameter callback. If the first parameter is an arrow function, setting the second this will fail because of the lexical binding of the arrow function.
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