How to use fill function in JavaScript

This article mainly introduces how to use the fill function in JavaScript, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand it.

Fill function

Syntax: arr.fill (value [, start [, end])

Method function: populates all elements in an array from the start index to the end index with a fixed value. Terminating the index is not included.

Return: returns the value of the replacement, and the original array changes.

Custom function: myFill.

Array.prototype.myFill = function (value, start = 0, end) {let element = this, len = element & & element.length | | 0; end = end | | len; let loopStart = start

< 0 ? 0 : start, // 设置循环开始值 loopEnd = end >

= len? Len: end; / / set cycle end value for (; loopStart < loopEnd; loopStart++) {element [loopStart] = value;} return element;} Thank you for reading this article carefully. I hope the article "how to use the fill function in JavaScript" shared by the editor will be helpful to you. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!