Object Model Reformation – elementIn?

http://wiki.ecmascript.org/doku.php?id=strawman:object_model_reformation

Currently, there one can override the built-in operators via elementGet (getting via []), elementSet (setting via []) and elementDelete (`delete` operator). Wouldn’t it make sense to also provide elementIn (`in` operator)?

-- 
Dr. Axel Rauschmayer
axel at rauschma.de

home: rauschma.de
twitter: twitter.com/rauschma
blog: 2ality.com

On Jan 1, 2012, at 5:54 AM, Axel Rauschmayer wrote:

> http://wiki.ecmascript.org/doku.php?id=strawman:object_model_reformation
> 
> Currently, there one can override the built-in operators via elementGet (getting via []), elementSet (setting via []) and elementDelete (`delete` operator). Wouldn’t it make sense to also provide elementIn (`in` operator)?

Probably.  It may depend upon how strongly you feel about obsoleting for-in in favor of for-of.

Allen


> 
> -- 
> Dr. Axel Rauschmayer
> axel at rauschma.de
> 
> home: rauschma.de
> twitter: twitter.com/rauschma
> blog: 2ality.com
> 
> 
> 
> _______________________________________________
> es-discuss mailing list
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>

>> Currently, there one can override the built-in operators via elementGet (getting via []), elementSet (setting via []) and elementDelete (`delete` operator). Wouldn’t it make sense to also provide elementIn (`in` operator)?
> 
> Probably.  It may depend upon how strongly you feel about obsoleting for-in in favor of for-of.


That would be some kind of iteration protocol(?) I’d be perfectly happy with not supporting for-in at all.

I was thinking about the relational operator `in`:

    if (key in myMap) {
        ...
    }

    if (element in mySet) {
        ...
    }

-- 
Dr. Axel Rauschmayer
axel at rauschma.de

home: rauschma.de
twitter: twitter.com/rauschma
blog: 2ality.com



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