functionmyDeepClone(obj){letclone;// 排除非引用类型数据if(obj==null||typeofobj!='object')returnobj;if(Array.isArray(obj)){// obj 是数组clone=newobj.constructor(obj.length)obj.forEach((value,index)=>{clone[index]=typeofvalue==='object'?myDeepClone(value):value})}else{// 浅拷贝一份...
本文将深入探讨JavaScript中的深拷贝（deep clone）和浅拷贝（shallow copy）概念，以及如何实现对象的深拷贝以避免浅拷贝带来的副作用。通常，我们通过赋值操作来复制变量，但对于基本数据类型（如字符串、布尔值、数字等），赋值实际上是值的复制，不会影响到原始变量。然而，对于引用数据类型（如对象、数组...
3、如果对象x的equals()方法定义恰当,那么x.clone().equals(x)应该成立 二、浅复制Demo publicclassCloneTest1 {publicstaticvoidmain(String[] args)throwsCloneNotSupportedException { Student student=newStudent(); student.setAge(20); student.setName("Larry"); Student student2=(Student)student.clone();...
浅拷贝:_.clone() 深拷贝:_.cloneDeep() var objects = [{ 'a': 1 }, { 'b': 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...
浅拷贝:_.clone() 深拷贝:_.cloneDeep() varobjects = [{'a':1}, {'b':2}];varshallow = _.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 ...
`Object.assign({}, original)` is much faster than `structuredClone(original)` but they're both fast
当我阅读MDN文档(https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy)关于浅拷贝的部分时,一切都变得清晰了。第一段明确解释了什么是浅拷贝。文档说: 对象的浅拷贝是一个副本,它的属性与拷贝所基于的源对象的属性共享相同的引用(指向相同的底层值)。因此,当您更改源或副本时,您可能会同时导致另一...
x.clone().getClass() == x.getClass() 克隆对象与原对象的类型一样 3、如果对象x的equals()方法定义恰当,那么x.clone().equals(x)应该成立 二、浅复制Demo publicclassCloneTest1 {publicstaticvoidmain(String[] args)throwsCloneNotSupportedException { ...
Let’s implement the deep clone of an object that contains a function and a Date() object to see a clearer picture of the problem.Add the new fields to the student1 object as in the example below.Example Code:let student1 = { name: 'kevin', age: function() { return 24; }, ...
Lodash offers the very convenient clone and deepclone functions to perform shallow and deep cloning.Lodash has this nice feature: you can import single functions separately in your project to reduce a lot the size of the dependency.In Node.js:...