How to Deep Copy Array in JavaScript Subodh PoudelFeb 02, 2024 JavaScriptJavaScript Array Video Player is loading. Current Time0:00 / Duration-:- Loaded:0% In this article, you will learn the deep and shallow copy concept. The article will also introduce ways to perform deep copy on array...
let result = Array.isArray(value) ? [] : {} // 函数直接返回 if (typeof value === 'function') { return value } // 处理引用类型的拷贝 result = initCloneByTag(value, getTag(value)) // 处理循环引用 if (stack.has(value)) { return stack.get(value) } stack.set(value, result) /...
return (cons === 'Array' || cons === 'Object') }// 实现深度拷贝 Array/Objectfunction deepClone(oldObj) { if(typeTrue(oldObj)) { var newObj = oldObj.constructor() for(let i in oldObj) { if (oldObj.hasOwnProperty(i)) { newObj[i] = typeTrue(oldObj[i]) ? deepClone(oldObj...
js实现深拷贝(deepClone) 首先我们要实现一个getType函数对元素进行类型判断,直接调用Object.prototype.toString 方法。 functiongetType(obj){letmap={"[object Boolean]":"boolean","[object Number]":"number","[object String]":"string","[object Function]":"function","[object Array]":"array","[object...
if (obj instanceof Array) { result = [] } else { result = {} } for (let key in obj) { // 保证 key 不是原型的属性 if (Object.prototype.hasOwnProperty(obj,key)) { // 递归调用!!! result[key] = deepClone(obj[key])
function deepClone (obj) { // 如果值 值类型 或 null ,直接返回 if (typeof obj !== 'object' || obj === null) { return obj; } let copy = {}; // 如果对象是数组 if (obj.constructor === Array) { copy = []; } // 遍历对象的每个属性 for (let k in obj) { // 如果 key...
复杂数据类型:Object、Array、Function、Date等 基础数据类型值,存储在栈(stack)中,拷贝的话,会重新在栈中开辟一个相同的空间存储数据。而复杂数据类型,值存储在堆(heap)中,栈中存储对值的引用地址。深浅拷贝,只针对复杂数据类型来说的。 浅拷贝ShallowCopy,是一个对象的逐位副本。创建一个新对象,该对象具有原始...
constregexpTag='[object RegExp]'functiondeepClone(value,stack=newWeakMap()){if(!isObject(value)){returnvalue}letresult=Array.isArray(value)?[]:{}// 函数直接返回if(typeofvalue==='function'){returnvalue}// 处理引用类型的拷贝result=initCloneByTag(value,getTag(value))// 处理循环引用if(stack...
let newObj = obj instanceof Array ? [] : {} for (let key in obj) { if (typeof obj[key] === 'object') { newObj[key] = deepClone(obj[key]) } else { newObj[key] = obj[key] } } return newObj }复制代码 1. 2. 3. ...
return copy; } // Handle Array if (obj instanceof Array) { var n = obj.length; copy = new Array(n); for (var i = 0; i < n; i++) { copy[i] = obj[i]; } return copy; } // Handle Object if (obj instanceof Object) { copy = {}; for (var attr in obj) { if (...