[whatwg] HTMLCollection and HTMLAllCollection suggestion

[Perry Smith]

HTMLCollection has a namedItem method that returns either null or one  
object. [1]

HTMLAllCollection has a namedItem method that returns either null, one  
object, or a collection of objects. [2]

I'm a Rails freak and one of the things that they do which I love is  
foo returns an item and foos returns a list of items.  The unconscious  
benefit of this I believe is huge.

My suggestion is to have namedItem always return either null or 1  
object.

And have namedItems always return a collection.  We can debate whether  
it is better to return null or an empty collection.  I prefer the  
latter myself.  Then I can always feed it to an iterator.

[1] http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#htmlcollection-0
[2] http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#htmlallcollection-0
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