getOwnPropertyDescriptor(obj, name); Object.defineProperty(copy, name, desc); }); return copy; } var obj1 = { a: 1, b: {bc: 50, dc: 100, be: {bea: 1}} }; var obj2 = deepCopy(obj1); console.log(obj2) obj1.a = 20; console.log(obj1) console.log(obj2) //Object {a...
console.log(originalCounter.count)//5console.log(copiedCounter.count)//5copiedCounter.count = 7console.log(originalCounter.count)//5console.log(copiedCounter.count)//7 如果实例中有其它对象的引用,就要在copy方法中使用 JSON.stringify 和 JSON.parse 。 除此之外,深拷贝方法还有jQuery.extend()和lodash....
copy = Object.create(Object.getPrototypeOf(obj));hash.set(obj, copy);for (let key in obj) {...
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。...
A way to create a shallow copy in JavaScript using theobject spread operator const myOriginal = { someProp: "with a string value", anotherProp: { withAnotherProp: 1, andAnotherProp: true } }; const myShallowCopy = {...myOriginal}; ...
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 ...
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]) ...
浅拷贝ShallowCopy,是一个对象的逐位副本。创建一个新对象,该对象具有原始对象中的精确副本。如果对象的任何字段是对其他对象的引用,则只复制引用地址,即只复制内存地址,而不复制对象本身,新旧对象还是共享同一块堆内存。改变其中一个对象,另一个也会受影响。如果有修改,会失去原始数据。
log(user1); // { name: 'Javascript Addicted', age: 33, university: { name: 'Shiraz Bahonar University' } } Spread operator / Object.assign() One way to create a shallow copy in JavaScript using the object spread operator ... or Object.assign() like the following: const myShallow...
copy[prop] =deepClone(target[prop]); } }returncopy; } 解决循环引用 letobj = {val:2}; obj.target= obj;deepClone(obj);// 报错: RangeError: Maximum call stack size exceeded 思路:创建一个 Map ,记录已经被拷贝的对象,遇到已经拷贝的对象,直接返回。