I wrote this blog post about some of the pain points I'm dealing with
and dreams of how ES7 might be able to address them:
http://www.nczonline.net/blog/2014/06/03/my-ecmascript-7-wishlist/
A short overview in lieu of posting the whole article here:
* `Array.prototype.first()`, `Array.prototype.last()` - return the first
and last items, respectively.
* `Array.prototype.isEmpty()` - return true when empty (would also be
nice on strings, maps, etc.).
* `Function.empty` - a standard empty function that can be used when you
just want an empty function (IMHO, it indicates intent much better than
other options toda).
* Custom descriptor attributes - David mentioned this likely will never
happen, which makes me sad. Maybe the decorators proposal solves this
use case.
* `Object.deepPreventExtensions()`, `Object.deepSeal()`,
`Object.deepFreeze()` - deep versions of `Object.preventExtensions()`,
et al.
* `Object.preventUndeclaredGet()` - change an object's behavior to throw
an error if you try to read from a property that doesn't exist (instead
of returning `undefine`).
* Lightweight traits - simple syntax sugar for object literals and
classes to facilitate mixins.
Further rationale and explanation is in the post. The last three, in
particular, scratch particular itches I currently have.
**Note:** Please don't take these as formal proposals. If any of the
ideas seems worthwhile, I'm happy to discuss further and/or put together
an actual proposal.
Thanks.
--
___________________________
Nicholas C. Zakas
http://www.nczonline.net
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