function deepCopy<T>(obj: T): T { // 处理null或undefined if (obj === null || typeof obj !== 'object') { return obj; } // 处理Date对象 if (obj instanceof Date) { return new Date(obj.getTime()); } // 处理数组 if (Array.isArray(obj)) { return obj.map(item =&...
javascript中一般有按值传递和按引用传递两种复制,按值传递的是基本数据类型(Number,String,Boolean,Null,Undefined),一般存放于内存中的栈区,存取速度快,存放量小;按引用传递的是引用类型(Object,Array,Function,Symbol),一般存放与内存中的堆区,存取速度慢,存放量大,其引用指针存于栈区,并指向引用本身。 深拷贝和...
function deepCopy(obj) { let result = obj instanceof Array ? [] : {} let keys = Object.keys(obj), key = null, temp = null; for (let i = 0; i < keys.length; i++) { key = keys[i] temp = obj[key] if (temp && typeof temp === 'object') { if(temp != obj){ //...
letextend=function(obj:object,objs:object,deep:boolean) { deep=deep||false; // tue深copy false 浅copy for(letproinobjs) { if(!deep) { obj[pro]=objs[pro]; }else{ if(typeofobjs[pro]=='object') { if(Object.prototype.toString.call(objs[pro])=='[object Object]') { for(letkeyin...
复制functiondeepCopy(obj:any):any{ if(typeofobj !=='object'|| obj ===null) { returnobj; } letcopy:any; if(Array.isArray(obj)) { copy = []; for(leti =0; i < obj.length; i++) { copy[i] =deepCopy(obj[i]); } }else{ copy = {}; for(letkeyinobj) { if(obj.hasOwn...
import { deepCopy } from '@angular-devkit/core/src/utils/object'; export class AppComponent { source = { ... } constructor() { const newObject = deepCopy(this.source); } } Package Version --- @angular-devkit/architect 0.1000.8 @angular-devkit/build-angular 0.1000.8 @angular-devkit/...
但由于 function 也是 Object 所以可以设置属性和方法。于是 axios 既可以表现的像实例,又可以直接函数调用 axios(config) 。具体实现如下:const createInstance = (defaultConfig: AxiosRequestConfig) => { const context = new Axios(defaultConfig); const instance = Axios.prototype.request.bind(context); extend(...
所以 axios 的类型是 function,不是 object。但由于 function 也是 Object 所以可以设置属性和方法。于是 axios 既可以表现的像实例,又可以直接函数调用 axios(config)。具体实现如下:const createInstance = (defaultConfig: AxiosRequestConfig) => { const context = new Axios(defaultConfig); const instance = ...
Copy functioninvertKeysAndValues<K,V>(map: Map<K, V>):Map<V,K> {returnnewMap(map.entries().map(([k, v]) =>[v, k]) ); } You can also extend the newIteratorobject: Copy /** * Provides an endless stream of `0`s.
//深拷贝实现functiondeepCopy(target,source){if(!source||typeofsource!=='object'){return;}// 这个方法有点小trick,target一定得事先定义好,不然就不能改变实参了。// 具体原因解释可以看参考资料中 JS是值传递还是引用传递if(!target||typeofsource!=='object'){return;}for(varkey in source){if(sour...