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...
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 ...
如果我在Java中创建一个2D int数组,然后使用Arrays.copyOf()复制它,如下所示- jshell> int[][] c1 = {{1,2}, {3,4}} c1 ==> int[2][] { int[2] { 1, 2 }, int[2] { 3, 4 } } jshell> int[][] d1 = Arrays.copyOf(c1, c1.length) d1 ==> int[2][] { int[2]...
var shallow = _.clone(objects);console.log(shallow[0] === objects[0]); // trueobjects[0].a = 11console.log(shallow[0]) // { a : 11} DeepCopy深拷贝的实现方式 1. 手动复制 要实现拷贝出来的副本,不受原本影响,那么可以这么实现 var o1 = { a : 1, b : 2 }var o2 = { a : o...
copy = options[ name ];// Prevent never-ending loop// 防止无限循环if( target === copy ) {continue; }// Recurse if we're merging plain objects or arrays// 如果要合并纯对象或数组,使用递归if( deep && copy && ( jQuery.isPlainObject( copy ) || ( copyIsArray =Array.isArray( copy )...
```javascript function deepCopy(obj, hash = new WeakMap()) { if (obj == null) return obj;...
} else if (isArray(obj[key])) { newObj[key] = everyArray(obj[key]) } else { newObj[key] = obj[key] } } return newObj } const deepCopy = (target) => { var newTarget = null if (isObject(target)) { newTarget = everyObject(target) ...
1 JavaScript deep copy of an object graph 2 How to deep copy (clone) an object with array members in Javascript? 11 How to deep copy a custom object in JavaScript? 0 Deep Clone ImageData JavaScript 1 How to make a deep copy of a object in Javascript 1 Deep copy object with Dept...
JS 真·深度拷贝(deepCopy) 方法: function deepCopy (data) { let dataTmp = undefined if (data === null || !(typeof data === 'object')) { dataTmp = data } else { dataTmp = data.constructor.name === 'Array' ? [] : {}...
1,2,{a:3}];constshallowCopyArray=[...originalArray];console.log(shallowCopyArray);// 输出:...