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 ...
In JavaScript, an object can be copied in two ways. They are deep copy and shallow copy.Firstly, let’s discuss shallow copy. A shallow copy of an object has properties that point to the same reference as the source object’s properties....
自己实现深拷贝方法 function deepCopy(obj) { let result = Array.isArray(obj) ? [] : {}; for (let key in obj) { if (obj.hasOwnProperty(key)) { if (typeof obj[key] === 'object') { result[key] = deepCopy(obj[key]); // 递归复制 } else { result[key] = obj[key]; } }...
首先,我们需要创建一个原始的JSONArray对象: importorg.json.JSONArray;importorg.json.JSONObject;publicclassDeepCopyExample{publicstaticvoidmain(String[]args){// 创建一个原始 JSONArray 对象JSONArrayoriginalArray=newJSONArray();// 向 JSONArray 中添加一些 JSONObject 数据JSONObjectobj1=newJSONObject();ob...
In Javascript, deep-copy techniques depend on the elements in an array. Let's start there. Three types of elements Elements can be: literal values, literal structures, or prototypes. // Literal values (type1) const booleanLiteral = true; const numberLiteral = 1; const stringLiteral = 'true...
2. 使用 JSON 对象实现一个简单的深拷贝函数(deepCopy) varobj1={age:20,name:'wangpeng',friend:{name:'dog',sex:'male'}}functioncopy(obj){varnewObj={}newObj=JSON.parse(JSON.stringify(obj))returnnewObj}varobj2=copy(obj1)console.log(obj2) ...
2、使用 JSON 对象实现一个简单的深拷贝函数(deepCopy) 思路:用JSON.stringify方法用于将一个值转为字符串。该字符串符合 JSON 格式,并且可以被JSON.parse方法还原。使用JSON.parse方法将JSON字符串转化成对象。 varoldObj={name:{firstName:'Jim',lastName:'King'},age:'24'}functionclone(obj){varnewObj;new...
) to create a shallow copy of an array, the slice() method to create a shallow copy of an array, or the JSON.parse() and JSON.stringify() methods to create a deep copy of an array. Also, the map, filter and concat methods are available to copy arrays in JavaScript. Choose the ...
Since arrays are collection-like objects in JavaScript, you can not simply use the equal operator (=) to copy the values. It will only copy the reference to the original object and not the elements of the array. In vanilla JavaScript, there are multiple ways to clone the contents of an ...
在JavaScript中,销毁是浅拷贝还是深拷贝? let {key} = obj …就像说: let key = obj.key 这是一个肤浅的复制品。 key = {msg: 'hello'} …用对新对象的引用覆盖对obj.key中同样存在的对象的引用。 这会使前一行变得毫无意义,因为在覆盖前没有对值进行任何处理。