learn typescript

Forced type conversions for typescript Converting a number to a string in typescript will cause an error: var a:number = 12345;var b:string = Laygroundsingle.ts (24,18): Error ts2352:neither type ' number ' nor type ' string ' is assignable to the other. This writing is not an error, but there are no eggs to use: var a:number = 12345;var b:string = Console.log (typeof B)"Number" playgroundsingle.js:19:1

In this section, we will describe the type inference in typescript. We will discuss where the type inference needs to be used and how to infer it.BasisIn typescript, type inference is used to provide type information in several places where there are no explicitly specified type annotations.var x = 3;The value of the variable "x" is inferred as number. This inference occurs when a variable or member is init

Why?Why use typescript, what are the benefits and when do I need it? Well, Typescript introduction on-line search is a big pile, various explanations, certainly more than I said the details, you can Google yourself. So, let's talk about my personal opinion! 1, out of curiosity about a new language, "black technology" what the total use of the meaning (like bridge.net is the C # version of JavaScript), not t

About Typescript:Typescript is a free and open source programming language developed by Microsoft. It is a superset of JavaScript and essentially adds optional static types and class-based object-oriented programming to the language. Typescript extends the syntax of JavaScript, so any existing JavaScript program can work without change in typescript. Typescript i

1, it is optional. That is, it does not let you completely abandon JS, and jump to another completely different language. You can even change the source code file from the JS suffix to the TS suffix to start enjoying the benefits of typescript. 2, compatible with ECMAScript standard. In particular, the latest version of TS is designed to be fully compatible with ES6. The benefit of this is that developers can use TS to advance the new features of ES6

I. Setting up a network proxy1) Step--window-->>network conntions->2) Open the QQ IP agent to find a fast network speed IP settings, the proposed use of the United States .Second, Install new softwarehttp://eclipse-update.palantir.com/eclipse-typescript/Third, attention1) do not tick the Enable TypeScript Builder, tick This it will not help you to generate JS file2) tick disable

Please note that this article is just my prejudice, and I am trying to understand the rationale for writing JavaScript code with compilers such as Coffeescript or typescript. Statically compiled, strongly typed languages and frameworks, I have these popular, rich backgrounds. My last job was to use typescript because I had to use it. It was a time of unhappiness, and I would leave for it.I am fortunate to h

First come to know Babylonjs, because based on WEBGL to develop, so first introduce the basic knowledge.WebGL is an HTML standard that he wants to initialize on a canvas element.Preparing for the HTML pageSo let's start by looking at the HTML pageWe set up a canvas that is available for Babylon renderingAnd then because we use typescript, you can see that the script introduced is called App.js, but in my project only app.tsApp.ts will be compiled as a

A blog post in MSDN link : Tutorial series:learning How to write a 3D soft engine from scratch in C #, TypeScript or JAVASC RiptThis tutorial are part of the following series:1–writing the core logic for camera, mesh Device Object (this article)2–drawing lines and triangles to obtain a wireframe rendering3–loading meshes exported from Blender in a JSON format4–filling the triangle with rasterization and using a Z-buffer4b–bonus:using Tips parallelis

The jquery framework is all that is used in the project, but jquery is too big for webapp, and of course you can choose the version of jquery 2.* for the mobile side.Here I use a more mobile zepto framework, he is similar to jquery syntax, equivalent to a streamlined jquery!Do WebApp have to consider the user's network situation and user experience degree, so the traditional paging, in the WebApp is certainly not, here the general situation is made of rolling automatic update, for the picture, o

CopyrightArticle reprinted from: HTTPS://GITHUB.COM/ZHONGSPIt is recommended that you jump directly to the URL above to see the latest version.IntroducedIn addition to the traditional approach to object-oriented inheritance, one way to create classes from reusable components is to federate the code of another simple class. You may be familiar with Mixins and its features in languages like Scala, but it's also popular in JavaScript.Mixed sampleThe following code shows how to use mixed in

In addition to the customary idea of facing objects, another popular way to create classes from reusable components is to mix simple classes together. You may be familiar with this hybrid approach or have an understanding of the features of the Scala language, a pattern that is popular in the JavaScript community.Mixed caseIn the following code, we show how to mix the model in typescript, after reading the code, and then analyzing its execution.//Disp

eating" +Food ); the } - } -Let snake =NewSnake (); -Snake.eat (' mouse ');//Throw: "Snake" class does not have eat () method +Let dog =NewDog (); -Dog.eat (' Bones ');//log: This dog is eating bones . +Let cat =NewCat (); ACat.eat (' fish ');//log: The cat is eating fishDemo by TypeScript:1Abstract class animal{//Defining abstract Classes Animal2 constructor () {}3 abstract Eat (food:string) {}4 /*defines the abstract method eat (),

Files globs would be available in TypeScript 2.0, so on the meantime, we need to use "exclude" and "RootDir" to configure W Hich files to load. This lesson shows how to switch from "files" to "exclude".curently, in Tsconfig.json, we use "files" to tell the main entry file as "Src/main". and import other file into Main.ts. But the problem are if you want add all files manually into "Files" config setting, IDEs cannot give the AutoComplete forThe rest o

Original address: http://www.moye.me/2015/04/25/using_typescript/Into the TypeScript pit for some time, sincerely optimistic, so decided to private plots in the long-winded.What is itTypeScript (hereinafter referred to as TS) is a hard-to-launch JavaScript translation language, which means: It needs to be compiled TS code will be compiled into JavaScript code TS is characterized by the provision of modules, classes, interfaces and ot

Webpack configuration, do not need to configure the Externals,webpack specific configuration as follows,Const WEBPACK = require (' Webpack '); const PATH = require (' path '); const Htmlwebpackplugin = require (' Html-webpack-plugin ' const {Checkerplugin} = require (' Awesome-typescript-loader ')//Set dev environment or pro environment Const WEBPACK_ENV = Process.env.WEBPACK _env | | ' Dev ';//Babel configuration, content with. babelrc File Const Bab

One, arrow expression Used to declare anonymous functions, eliminate the This pointer problem for traditional anonymous functions A single line can be omitted {}, multiple lines cannot be saved. var sum = (arg1,arg2) = ARG1+ARG2; Define a lunch function var dosomething = () =>{ Console.log ("Hahahha"); } return even var array = [1,2,3,4]Console.log (Array.filter (value = = value% 2 = = 0)); , eliminating the this pointer problem for traditional anonymous functions JavaScript functions function G

Inheritance of classes: object-oriented patterns Super: Keywords Class Animal { name:string; Constructor (thename:string) { this.name = thename; } Move (Distanceinmeters:number = 0) { console.log (' ${this.name} moved ${distanceinmeters}m. '); } Class Snack extends Animal { Constructor (name:string) { super (name);//Call constructor of parent class } // Overrides the parent class's method move (Distanceinmeters = 5) { console.log ("slithering ..."); Supe

Observable.prototype.debug =function (message:any) {return This. Do(Next)= { if(!environment.production) {console.log (message, next); }}, (Err)= { if(!environment.production) {console.error (message, Err)}}, ()= { if(!environment.production) {console.info ("Observable completed", Message)} } );}; DECLARE module'rxjs/observable' { InterfaceObservable{debug: (... any)= observable }}[RxJS] Add Debug method to Observable in TypeScript