interface A { a: string;}interface B { b: string;}let a = { a:'1' };let b = {b:'1'};function extend<T, U>(first: T, second: U): T & U { let result = <T & U>{}; for (let id in first) { (<any>result)[id] = (<any>first)[id]; } fo...
js编译后的文件: 1var __extends = (this && this.__extends) || (function () {2var extendStatics = function (d, b) {3extendStatics = Object.setPrototypeOf ||4({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||5function (d, b) { for (...
function extend<T, U>(first: T, second: U): T & U { let result = <T & U>{}; for (let id in first) { (<any>result)[id] = (<any>first)[id]; } for (let id in second) { if (!result.hasOwnProperty(id)) { (<any>result)[id] = (<any>second)[id]; } } return ...
type PartialPointY={y: number}//并集type PartialPoint = PartialPointX |PartialPointY//交叉type PartialPoint1 = PartialPointX &PartialPointY//【元祖类型】type Data = [number, string,boolean] 3. Extend 🔊: 都可以被继承,但是语法上会有些不同。另外需要注意的是,「interface 和 type 彼此并不互斥...
function extend(object: any): void; } // src/index.ts jQuery.fn.extend({ check: function() { return this.each(function() { this.checked = true; }); } }); interface和type 除了全局变量之外,可能有一些类型我们也希望能暴露出来。在类型声明文件中,我们可以直接使用interface或type来声明一个全局...
functionextend<T,U>(first:T,second:U):T&U{constresult=<T&U>{};for(letpropinfirst){(<T>result)[prop]=first[prop];}for(letpropinsecond){if(!result.hasOwnProperty(prop)){(<U>result)[prop]=second[prop];}}returnresult;}letobj=extend({a:1},{b:2}); ...
function extend<T, U>(first: T, second: U): T & U { let result = <T & U>{}; for (let id in first) { (<any>result)[id] = (<any>first)[id]; } for (let id in second) { if (!result.hasOwnProperty(id)) { (<any>result)[id] = (<any>second)[id]; } } return ...
setPrototypeOf || ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; }; return extendStatics(d, b); }; return function (d, b) { extendStatics(d, b...
functionextend<T , U>(first: T,second: U) : T & U {let result: <T & U> = {}for(letkeyinfirst) {result[key] =first[key]}for(letkeyinsecond) {if(!result.hasOwnProperty(key)) {result[key] =second[key]}}returnresult}
function(foo, bar) {})定义“值参数”一样--我们可以为大多数类型结构(包括函数function<A, B>(...