JavaScript proposal: destructuring assignment

http://wiki.ecmascript.org/doku.php?id=proposals:destructuring_assignment

by fogus • 14 years ago

26 8 14 years ago

wiki.ecmascript.org

antinitro• 14 years ago

Seems like half of the comments are from 6 years ago, am I missing something?

wingo• 14 years ago

A form of this will probably be in ES6:

http://people.mozilla.org/~jorendorff/es6-draft.html#sec-11....

yoklov• 14 years ago

CoffeeScript implements this syntax, and, of course, it's extremely awesome.

http://coffeescript.org/#destructuring

samth• 14 years ago

That link is to a really old ES4 discussion. The proposal for ES6 is at http://wiki.ecmascript.org/doku.php?id=harmony:destructuring and has now been incorporated in the draft ES6 spec.

VMG• 14 years ago

This would be extremely handy. At the moment I'm sometimes even writing

   (function (a, b, c) {/**/}).apply(null, packed);

to emulate destructuring.

fmstephe• 14 years ago

I think this is a great proposal. I would be very happy to see destructuring assignment in JS. In every other language I've used that supports this (Erlang, Clojure) it is a big win.

Roboprog• 14 years ago

Cool, if it gets widespread implementation.

Had to read a ways down to see an example to confirm, in simple terms, that this would mean you could make function calls such as:

( a, b, c) = f();

like you would in Perl / Python / Ruby. (not so good at decoding BNF while I'm sipping my first cup of coffee in the morning...)

Zecc• 14 years ago

This is something that's been in Firefox's JS way back since FF 2.0.

https://developer.mozilla.org/en/New_in_JavaScript_1.7

JavaScript proposal: destructuring assignment

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