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...
Because arrays in JS are reference values, so when you try to copy it using the = it will only copy the reference to the original array and not the value of the array. To create a real copy of an array, you need to copy over the value of the array under a new value variable. ...
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); // ...
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 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...
baseClone对数组和对象有两种处理方式。数组会调用initCloneArray function initCloneArray(array) { var length = array.length, result = array.constructor(length); // Add properties assigned by `RegExp#exec`. 下边这几行一脸懵逼。。 if (length && typeof array[0] == 'string' && hasOwnProperty....
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; ...
To clone an array of objects in Vue.js, there are different techniques you can use, such as the spread operator, JSON methods, or custom functions. Choosing the right method is important to ensure a deep copy without affecting the original data.
@darksheep/clone CloneObject,Array,Set, andMapobjects deeply and quickly. This function throws an error when encountering an object that it does not know how to clone. Example ### Basic clone import{clone}from'@darksheep/clone';constinput={a:1};constoutput=clone(input);console.info(input==...
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 Baseline 2022 Newly available Since March 2022, this feature works across the latest devices...