pre{background:#eef;padding:5px}
Ha, enumerable on steroids!
Ok, CSS3 selectors partially accomplish this so instead of:
$$('.register input').findAll(function(el){return el.checked})
we do
$$('.register input:checked')
Selectors, of course, are quite limited and are not fully supported as of
now (while :empty, :enabled and :disabled work, :contains doesn't). Besides,
thinking about all the prototype's Element.Methods which would be possible
to use, this looks pretty sweet.
Your example:
['FOO', 'BAR', 'BAZ'].map('toLowerCase.toArray')
can now be done easily with invoke (though a little more verbose):
['FOO', 'BAR', 'BAZ'].invoke('toLowerCase').invoke('toArray');
As far as syntax, I think parameters should not be passed as an array:
someDivs.findAll(['hasClassName', 'myClass']);
following invoke's philosophy it should be simply:
someDivs.findAll('hasClassName', 'myClass');
// just like
someDivs.invoke('addClassName', 'myClass');
Thinking further, there are 65 Element.Methods. The passive ones are only 5:
visible, match, hasClassName, empty, descendantOf
All the rest are either action methods (addClassName, toggle, identify - we
have invoke for these), DOM traversal ones (up, next, ancestors - those are
usually invoked on a single element) and property related (getHeight,
getStyle, getOpacity). The latter ones can be collected either way:
someCollection.map(Element.Methods.getWidth)
//or
someCollection.collect(function(el){return el.getStyle('opacity')})
Just trying to figure out if it really makes sense to have it in a core.
Best,
http://thinkweb2.com/projects/prototype/ kangax
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