你不能使用 JSON.stringify 和 JSON.parse 来拷贝自定义类型的数据,下面的例子使用一个自定义的 copy() 方法: class Counter { constructor() {this.count = 5} copy() { const copy=newCounter() copy.count=this.countreturncopy } } const originalCounter=newCounter() const copiedCounter=originalCounter...
function deepCopy(obj, hash = new WeakMap()) { if (obj == null) return obj; // 处理null...
function deepCopy (data) { let dataTmp = undefined if (data === null || !(typeof data === 'object')) { dataTmp = data } else { dataTmp = data.constructor.name === 'Array' ? [] : {} for (let key in data) { dataTmp[key] = deepCopy(data[key]) } } return dataTmp }...
1. 浅拷贝(Shallow Copy):浅拷贝仅复制对象或数组的一层结构,而不会递归地复制嵌套的对象或数组。...
```javascript /***实现jquery中的深拷贝功能*@param {Object} obj 要拷贝的对象*@returns {Object} 深拷贝后的对象 */ function deepCopy(obj) { if (typeof obj !== 'object' || obj === null) { return obj; }let copy = Array.isArray(obj) ? [] : {};for (let key in obj) { ...
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...
下面是一个实现深拷贝的JavaScript函数: ```javascript function deepCopy(obj) { if (typeof obj !== 'object' || obj === null) { return obj; } let copy; if (Array.isArray(obj)) { copy = []; for (let i = 0; i < obj.length; i++) { copy[i] = deepCopy(obj[i]); } }...
如果不考虑RegExp, Function, Symbol, 循环引用的问题,那么使用JSON是一个不错的选择。 比如有这样一个对象: var target = { name: 'fedaily', age: 1, topics: ['react', 'vue', 'css'] } var copyTarget = JSON.parse(JSON.stringify(target)) ...
const myOriginal = { title: "Full Stack JavaScript Developer", info: { firstname: "Javascript", surname: " Addicted", age: 34 } }; const myDeepCopy = structuredClone(myOriginal); structuredClone() You can use structuredClone() that is a built-in function for deep-copying. Structured ...
What is the most efficient way to deep clone an object in JavaScript? (67 answers) Closed last year. guy, i try to write a deepcopy function but it cant not work , but i cant not figure out the problem . below is my script const obj = { name : 'ABC', age : 18, habbit ...