I agree. As said, it was an unfortunate blunder that will probably
remain for the forseeable future.
On the plus side, it's not terribly hard to work around, and if it's a
major problem you can overwrite the jQuery.fn.each function, or even
jQuery.each (it shouldn't be that big of a deal, though).
On Aug 11, 9:31 am, Daniel Friesen <nadir.seen.f...@gmail.com> wrote:
> Event callback: function(eventObject) { this = domnode }// Because
> that's the way events have always worked
> each() callback: function(index, sameAsThis) { this = item/domnode } //
> Keeping the pattern
> map() callback: function(index, sameAsThis) { this = item/domnode } //
> Keeping the pattern
> filter() callback: function(index) { this = item/domnode } // sorta
> keeping the pattern
> vs.
> Event callback: function(eventObject) { this = domnode } // event
> callbacks MUST use this as domnode, otherwise you destroy the api it was
> based on
> each() callback: function(item, index?) { ... }
> map() callback: function(item, index?) { ... }
> filter() callback: function(item, index?) { ... }
>
> Whether you like it or not, jQuery is a library for working with the
> dom. Thus when created each/map/filter had nothing to do with the array
> methods that have only been put into browsers recently (yes, recently...
> you are comparing standards set by new features, with decisions that
> were made years ago; not the best comparison), they were created to give
> control over the jQuery object's list of dom nodes. Thus, since all the
> other apis which worked with dom nodes used `this` to refer to the dom
> node that same api was used when writing those methods.
> It's only a side effect that these methods happen to be usable on
> non-domlist arrays. Though frankly, imho that is abuse, these methods
> are not meant for that purpose, you can plainly see that in how $.fn.map
> differs from Array.prototype.map in how it folds arrays into the list
> rather than adding them as items.
>
> ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name]
>
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