In shallow copy, some of the properties of the original object also get affected. To understand this, please see the below example. varobj1={'firstName':'James','lastName':'Bond','films':['No Time To Die','Spectre','Skyfall','Quantum of Solace'],'actors':{'characters':{'realName...
一、场景 在js中一个对象(Object)或者是一个数组(Array)在复制的过程中往往不是特别的简单,一般情况下我们会直接将其赋值给另外一个变量名下,就像这样: 但是很显然这样的话,只是把原来的数组引用了,实际上两个变量下用的还是同一个数组,所以如果我们想复制出来一
*/// export {};constlog =console.log;// JS 对象深拷贝 / js object deepClonefunctiondeepClone(obj) {if(typeofobj !=="object") {returnobj; }if(Array.isArray(obj)) {returnobj.map(i=>deepClone(i)); }lettemp = {};for(constkeyinobj) {if(Object.prototype.hasOwnProperty.call(obj,...
let originalObj = { a: 1, b: { c: 2 } }; let shallowCopy = { ...originalObj }; // 使用扩展运算符 // 或者使用 Object.assign() let shallowCopy2 = Object.assign({}, originalObj); // 修改浅拷贝中的嵌套对象会影响原对象 shallowCopy.b.c = 3; console.log(originalObj.b.c); ...
JS Object Deep Copy & 深拷贝 & 浅拷贝 Object.assign 是浅拷贝 针对深度拷贝,需要使用其他方法 JSON.parse(JSON.stringify(obj));,因为 Object.assign() 拷贝的是属性值。 假如源对象的属性值是一个指向对象的引用,它也只拷贝那个引用值。
for (var key in oldObj) { var item = oldObj[key]; // 判断是否是对象 if (item instanceof Object) { newobj[key] = {}; //定义一个空的对象来接收拷贝的内容 deepCopy(item, newobj[key]); //递归调用 // 判断是否是数组 } else if (item instanceof Array) { ...
new_object = copy.copy(old_object) 在使用copy()函数时,需要注意以下几点: copy()函数只能用于可变对象,例如列表、字典等。对于不可变对象,如数字、字符串等,copy()函数没有任何效果。 copy()函数只进行浅拷贝,即只复制对象本身,而不会复制对象内部的子对象。如果需要进行深拷贝,可以使用copy模块中的deepcopy...
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}; ...
receiver{Object} provider{Object} omit{String|Array}: (optional) One or more properties to omit filter{Function}: (optional) Called on each key before copying the property. If the function returns false, the property will not be copied. ...
Two ways of copying arrays in JavaScript There are two ways to copy arrays in JavaScript: Shallow copy: when copying an array with objects, the object reference is copied into a new reference variable, and both point to the same object in memory. In this case, the source or copy changes...