Whats "@" used for?

[Kevin Ingwersen]

Hey.

Short question; what is the @ operator used for in JS?

in PHP, its the „silence errors“ operator.

Kind regards, Ingwie.

--

"Yo Dawg, I heard you like C++, so I  added C++ to your build system, so you have to compile before you compile.“ -StackOverflow, Matt Joiner ( http://stackoverflow.com/a/5025525/2423150 )

[William Dias]

Hi,

The @ is an illegal token in JS.

You may be confused with the "@" operator of coffeescript (that compiles to javascript and is widely used) that is just an alias for "this".

Reference: http://coffeescript.org/#operators

[Bence Dányi]

Hi Ingwie,

there is no @ operator in javascript (at the moment).

Bence
:wq

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[Angel Java Lopez]

Sorry, I don't know a code that uses @ in Node.js

Do you have code to show?

Node.js is based on JavaScript, I didn't find the @ operator at (not pun intended ;-)

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators

Angel "Java" Lopez

@ajlopez

[Alan Hoffmeister]

In JavaScript we use it in e-mail strings.
--
Att,
Alan Hoffmeister

[Ryan Schmidt]

On May 19, 2014, at 03:09, Kevin Ingwersen wrote:

> Short question; what is the @ operator used for in JS?
> in PHP, its the „silence errors“ operator.

Maybe I'm not awake yet, but I cannot recall "@" being used as an operator in JavaScript. Have you seen code where this is used? If so, please share it with us.

[Rick Waldron]

Nothing as of yet, but there are proposals for ES7 to use it as a private property prefix: 

function Foo() {

  this.@privy = true;

  this._privy = false

}

var foo = new Foo();

foo; 

{ _privy: false } <-- no access to @privy property

Rick

[Mariano Pardo]

In ES6 proposal, you can use @ for annotations.
A great example is the DI from angular 2 (https://www.npmjs.org/package/ng-annotate).

Mariano

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[Kevin Ingwersen]

Thanks for the replies!

I was only asking, as I accidentially typed @ into nodejs’ REPL and it showed me the „…“ thing…so I got confused.

I would vote for the proposal in ES7. It looks very nice to me.

--

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[David Jacobs]

Annotations are out of control in the Java world. It's a slippery slope; it looks nice in the simplest case, but as the use cases evolve, the annotations expand, including many additional properties for each annotation, more sophisticated meta directives, and even small scripts. Then it is code, just as much as the "actual" code, except sitting within an alternate and awkward demarcation syntax, for no good reason. In retrospect, you're left wondering "how did it come to this?! This is stupid."

Why wait for the retrospective regret? It's stupid right now.

-David

@MetaThis

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[Rick Waldron]

On Mon, May 19, 2014 at 4:16 PM, Mariano Pardo <maria...@gmail.com> wrote:

In ES6 proposal, you can use @ for annotations.

Presumably you're referring to this: https://github.com/google/traceur-compiler/wiki/LanguageFeatures#annotations-experimental Note that this "feature" has no official strawman. 

A great example is the DI from angular 2 (https://www.npmjs.org/package/ng-annotate).

These are just comment-based annotations.

Rick

 

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