The simplest way to make a deep clone of an array in JavaScript is by using the JSON object methods: JSON.stringify() and JSON.parse():const animals = [{ cat: '🐱', monkey: '🐒', whale: '🐋' }]; const moreAnimals = JSON.parse(JSON.stringify(animals)); console.log(more...
1、JavaScript constructor 属性:constructor 属性返回对创建此对象的数组函数的引用。http://www.w3school.com.cn/jsref/jsref_constructor_array.asp var test=new Array(); if (test.constructor==Array) { document.write("This is an Array"); } if (test.constructor==Boolean) { document.write("This...
When we need to copy an array, we often time used `slice`. But with ES6, you can also use the spread operator to duplicate an array...
2) x.clone().getClass() == x.getClass() will be true, but these are not absolute requirements. 3) x.clone().equals(x) will be true, this is not an absolute requirement. */protectednative Objectclone()throws CloneNotSupportedException; 仔细看,它是个native方法,native方法是由非java语言...
Clone an arrayconst arr = [1, 2, { a: 3 }]; const clone = deepClone(arr); console.log(clone); // [1, 2, { a: 3 }] console.log(clone[2] === arr[2]); // falseClone with a Date const date = new Date(); const clone = deepClone(date); console.log(clone); // ...
JavaScript 中 structuredClone 和 JSON.parse(JSON.stringify()) 克隆对象的异同点 一、什么是 structuredClone? 1. structuredClone 的发展 structuredClone是在ECMAScript2021(ES12)标准中引入的,ECMAScript2021 规范正式发布于 2021 年 6 月 自2022 年 3 月起,该功能适用于最新的设备和浏览器版本 ...
When I used spread...to copy an array, I'm only creating a shallow copy. If the array is nested or multi-dimensional, it won't work. Let's take a look: letnestedArray=[1,[2],3];letarrayCopy=[...nestedArray];// Make some changesarrayCopy[0]='👻';// change shallow element...
} if(!objClone || (''+objClone)=='') { return (new String(this)+objClone)?this:objClone; } else { objClone.toString=this.toString; return objClone; } } //数组克隆 Array.prototype.clone = function() { var c = []; var old = this; ...
// Scala program to create the clone of an array object Sample { def main(args: Array[String]) { var arr = Array(1, 2, 3, 4, 5) var cloneArr = arr.clone() var i: Int = 0; printf("Elements of Array 'arr':\n") i = 0; while (i < 5) { printf("%d ", arr(i));...
JavaScript 中 structuredClone 和 JSON.parse(JSON.stringify()) 克隆对象的异同点 一、什么是 structuredClone? 1. structuredClone 的发展 structuredClone是在ECMAScript2021(ES12)标准中引入的,ECMAScript2021 规范正式发布于 2021 年 6 月 自2022 年 3 月起,该功能适用于最新的设备和浏览器版本 ...