The TypeScript team doesn&#39;t issue an &quot;official&quot; style guide for other projects using TypeScript. The guidelines for working on the compiler itself are both too specific and not broad enough for general use; I would not use them as a baseline.

Any JavaScript style guide that is up-to-date for ES6 is going to cover nearly all TypeScript constructs except for type annotations, so I would start with your favorite JS style and decide on what you want the rules for type annotations to be.

[TSLint][1] is a good choice for enforcing style rules around types / type annotations.

**Update**: TSLint is currently deprectated in favour of [ESLint][2].


  [1]: https://github.com/palantir/tslint
  [2]: https://github.com/eslint/eslint

Maybe this is a bit late, but I stumbled upon https://github.com/excelmicro/typescript which also provides a bit more detailed tslint.json in the linters folder ... it is also based on the airbnb/javascript styleguide ...

Yet another Styleguide (which we use for angular 1 development with TypeScript) is https://angular.io/guide/styleguide

When I attempt to navigate to the Android developer website, I am redirected to a version of it much of which is in Chinese. For instance, if I try to navigate to:

    developer.android.com

I am redirected to:

    http://developer.android.com/intl/zh-cn/index.html

I want the English language site. In some cases, I&#39;ve had to have web pages translated from Chinese. What am I doing wrong? How can I suppress this behavior?

How do I set the language for the Android developer website?

I have two arrays

    var array1 = new Array [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;, &quot;e&quot;]
    var array2 = new Array [&quot;a&quot;, &quot;c&quot;, &quot;d&quot;]

I want to remove elements of array2 from array1

    Result [&quot;b&quot;, &quot;e&quot;]



iOS swift remove elements of an array from another array

I love the [Airbnb JavaScript Style Guide][1]. Most of the rules also apply to TypeScript, but of course it doesn&#39;t cover specific TypeScript language features. 

I have also found the [Microsoft TypeScript Coding Guidelines][2] but they are for the TypeScript project itself, not for projects that **use** TypeScript. 

Finally I found the [TypeScript Style Guide by Platypi][3] but it&#39;s not as detailed as I&#39;d like it to be. Is there another (official?) TypeScript Style Guide that I missed? Or are the two I listed the only ones that exist? 


  [1]: https://github.com/airbnb/javascript
  [2]: https://github.com/Microsoft/TypeScript/wiki/Coding-guidelines
  [3]: https://github.com/Platypi/style_typescript

TypeScript Coding Style Guide?

I love the <a href="https://github.com/airbnb/javascript" target="_blank" rel="noopener noreferrer">Airbnb JavaScript Style Guide</a>. Most of the rules also apply to TypeScript, but of course it doesn't cover specific TypeScript language features.
I have also found the <a href="https://github.com/Microsoft/TypeScript/wiki/Coding-guidelines" target="_blank" rel="noopener noreferrer">Microsoft TypeScript Coding Guidelines</a> but they are for the TypeScript project itself, not for projects that use TypeScript.
Finally I found the <a href="https://github.com/Platypi/style_typescript" target="_blank" rel="noopener noreferrer">TypeScript Style Guide by Platypi</a> but it's not as detailed as I'd like it to be. Is there another (official?) TypeScript Style Guide that I missed? Or are the two I listed the only ones that exist?

So, reStructuredText is
[the recommended way](https://www.python.org/dev/peps/pep-0287) for Python code
documentation, if you try hard enough, you can
[find in the sphinx documentation](http://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#python-signatures)
how to normalize your function signature documentation. All given examples are
single-line, but what if a parameter description is multi-line like the following
?

    def f(a, b):
        &quot;&quot;&quot; Does something with a and b

        :param a: something simple
        :param b: well, it&#39;s not something simple, so it may require more than eighty
                  chars
        &quot;&quot;&quot;

What is the syntax/convention for that ? Should I indent or not ? will it break reSTructuredText rendering ?


Multi-line description of a parameter description in python docstring

I know that JavaScript (and thus TypeScript) support the omission of semicolons in many cases. Nevertheless I want to add semicolons to be unambiguous as suggested in [TypeScript Deep Dive](https://basarat.gitbooks.io/typescript/content/docs/styleguide/styleguide.html#semicolons)

However I cannot find a guide that lists where to use semicolon. For example look at the following code

    class Person {
      private name: string; // A
    
      constructor(name: string) {
        this.name = name;
      }; // B

      public add = () =&gt; {
        return &quot;C&quot;;
      }; // C
    }; // D

I&#39;m fairly sure to use a semicolon at *A*. But what about *B*, *C*, *D* and all the other cases not covered by my example?

I&#39;m not asking where to omit semicolon but where to add them. An answer like *always* does not fulfill my needs since I cannot add a `;` after `public`. I want to know where exactly to put semicolon.

When is it appropriate to use a semicolon?

I have been working on an Android app which uses `try/catch` frequently to prevent it from crashing even on places where there is no need. For example,

A view in `xml layout` with `id = toolbar` is referenced like:
    
    // see new example below, this one is just confusing
    // it seems like I am asking about empty try/catch
    try {
        View view = findViewById(R.id.toolbar);
    }
    catch(Exception e) {
    }

This approach is used throughout the app. The stack trace is not printed and it&#39;s really hard to find what went wrong. The app closes suddenly without printing any stack trace.

I asked my senior to explain it to me and he said,

&gt; This is for preventing crashing in production.

**I totally disagree with it**. To me this is not the way to prevent apps from crashes. It shows that developer **doesn&#39;t** know what he/she is doing and is in doubt.

Is this the approach being used in industry to prevent enterprise apps from crashes?

If `try/catch` is really, really our need then is it possible to attach an exception handler with UI thread or other threads and catch everything there? That will be a better approach if possible.

Yes, empty `try/catch` is bad and even if we print stack trace or log exception to server, wrapping blocks of code in `try/catch` randomly across all the app doesn&#39;t make sense to me e.g. when every function is enclosed in a `try/catch`.

**UPDATE**

As this question has got a lot of attention and some people have misinterpreted the question (perhaps because I haven&#39;t phrased it clearly) I am going to rephrase it. 

Here is what developers are doing here

- A function is written and **tested**, it can be a small function which just initializes views or a complex one, after testing it is wrapped around `try/catch` block. Even for function which will never throw any exception.

- This practice is used throughout the application. Sometime stack trace is printed and sometime just a `debug log` with some random error message. This error message differ from developer to developer.

- With this approach, app does not crash but behavior of the app becomes undetermined. Even sometime it is hard to follow what went wrong.

- The real question I have been asking was; **Is it the practice being following in the industry for preventing the enterprise applications from crashes?** and I am not asking about **empty try/catch**. Is it like, users love application which do not crash than applications which behave unexpectedly? Because it really boils down to either crash it or present the user with a blank screen or the behaviour user is unaware of.

- I am posting a few snippets from the real code here

          private void makeRequestForForgetPassword() {
            try {
                HashMap&lt;String, Object&gt; params = new HashMap&lt;&gt;();
    
                String email= CurrentUserData.msisdn;
                params.put(&quot;email&quot;, &quot;blabla&quot;);
                params.put(&quot;new_password&quot;, password);
    
                NetworkProcess networkProcessForgetStep = new NetworkProcess(
                    serviceCallListenerForgotPasswordStep, ForgotPassword.this);
                networkProcessForgetStep.serviceProcessing(params, 
                    Constants.API_FORGOT_PASSWORD);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

         private void languagePopUpDialog(View view) {
            try {
                PopupWindow popupwindow_obj = popupDisplay();
                popupwindow_obj.showAsDropDown(view, -50, 0);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        
        void reloadActivity() {
            try {
                onCreateProcess();
            } catch (Exception e) {
            }
        }


&gt; It is **not** duplicate of [Android exception handling best
&gt; practices][1], there OP is trying to catch exception for a **different**
&gt; purpose than this question.


  [1]: https://stackoverflow.com/questions/16561692/android-exception-handling-best-practice

Using try/catch for preventing app from crashes

I do sometimes see abbreviations in properties for the getter. E.g. those two types:

    public int Number { get; } = 0

    public int Number =&gt; 0;

Can someone please tell me if there are any differences between those two. How do they behave? Are both of them read-only?

Difference in C# between different getter styles

i&#39;m using VS Code for flutter development and one issue i have is code formatting (styling) which is not as customizable as it is in android-studio. my problem is that each time vs code saves dart files it will break my lines very short like below:

```dart
var tuple =
       settings.arguments as Tuple3&lt;String, int, Field&gt;;
```

obviously this is what i want :


```dart
var tuple = settings.arguments as Tuple3&lt;String, int, Field&gt;;
```

how can i solve this problem?

how to change dart line length in vscode when formatting dart files?

I am trying 

    $(function(){ 
        alert(&#39;Hello&#39;); 
    });

Its showing this error in Visual Studio: `(TS) Cannot find name &#39;$&#39;.`. How can I use jQuery with TypeScript ?



How to use jQuery with TypeScript

I am working in the context of Visual Studio 2015 (with Resharper), and am referencing a TypeScript definitions file for NodeJS.  I have 3 other VS projects that are using `node.d.ts` without problems.  In this new project, however, I now have 146 errors saying the same thing:  

&gt; &quot;Typescript Feature 1.5.  Current language level is 1.4&quot;.

For the life of me, I can&#39;t figure out how to tell Visual Studio (or Resharper?) to use the latest TypeScript language version.  

I&#39;ve tried:  **Tools &gt; Options &gt; Typescript &gt; Project &gt; General &gt; ECMAScript6** (selected) and it didn&#39;t work.

Also:

    npm install -g typescript

and it didn&#39;t work as well.

How do I tell VS to use Typescript 1.5.3 (which `node.d.td` is asking for)?


Error: Typescript Feature 1.5. Current language level is 1.4

The typescript handbook currently has nothing on arrow functions. Normal functions
can be generically typed with this syntax:
example:

    function identity&lt;T&gt;(arg: T): T {
        return arg;
    }

What is the syntax for arrow functions? 

What is the syntax for Typescript arrow functions with generics?

I&#39;m using [Angular][1], [TypeScript][2] to send a file, along with JSON Data to a server.

Below is my code:

    import {Component, View, NgFor, FORM_DIRECTIVES, FormBuilder, ControlGroup} from &#39;angular2/angular2&#39;;
    import {Http, Response, Headers} from &#39;http/http&#39;;


    @Component({ selector: &#39;file-upload&#39; })
    @View({
    directives: [FORM_DIRECTIVES],
    template: `
    &lt;h3&gt;File Upload&lt;/h3&gt;

    &lt;div&gt;
         Select file:
        &lt;input type=&quot;file&quot; (change)=&quot;changeListener($event)&quot;&gt;
    &lt;/div&gt;

    `
    })
    export class FileUploadCmp {

    public file: File;
    public url: string;
    headers: Headers;


    constructor(public http: Http) {
        console.log(&#39;file upload Initialized&#39;);
        //set the header as multipart        
        this.headers = new Headers();
        this.headers.set(&#39;Content-Type&#39;, &#39;multipart/form-data&#39;);
        this.url = &#39;http://localhost:8080/test&#39;;
    }
    
    //onChange file listener
    changeListener($event): void {
        this.postFile($event.target);
    }
    
    //send post file to server 
    postFile(inputValue: any): void {

        var formData = new FormData();
        formData.append(&quot;name&quot;, &quot;Name&quot;);
        formData.append(&quot;file&quot;,  inputValue.files[0]);

        this.http.post(this.url +,
          formData ,
            {
                headers: this.headers

            });
    }

    }


How can I transform the `formData` to String and send it to the server? I remember in [AngularJS][3] (v1) you would use `transformRequest`.


  [1]: https://angular.io/
  [2]: https://www.typescriptlang.org/
  [3]: https://angularjs.org/

Angular - POST uploaded file

Is there a way to nest classes in TypeScript. E.g. I&#39;d like to use them like: 

    var foo = new Foo();
    var bar = new Foo.Bar();

Content Type	Original Author	Original Content on Stackoverflow
Question	Johannes Fahrenkrug	View Question on Stackoverflow
Solution 1 - Coding Style	Ryan Cavanaugh	View Answer on Stackoverflow
Solution 2 - Coding Style	david	View Answer on Stackoverflow

TypeScript Coding Style Guide?

Coding Style Problem Overview

Coding Style Solutions

Solution 1 - Coding Style

Solution 2 - Coding Style

iOS swift remove elements of an array from another array

How do I set the language for the Android developer website?

Attributions