Another helpful side effect is that if someone tries to reference any
of the flyweight objects in the callback (or `this`), then it won't
contain any elements, which makes it somewhat easier to spot the
error:
http://pastebin.com/f6d022e67
On Jul 22, 2:09 pm, Endrész Balázs <balazs.endr...@gmail.com> wrote:
> Have you considered using a flyweight object?
> It's about seven times faster in FF3.5 than creating a new jQuery
> object on every iteration:
>
> var el = document.body;
> var t = new Date;
> for(var i=0;i<10000;i++)
> $(el);
> console.log(new Date - t);
>
> var $fly = $();
> var t = new Date;
> for(var i=0;i<10000;i++)
> $fly[0] = el;
> console.log(new Date - t);
>
> And you can still make it a proper jQuery object by calling $( $fly )
> inside the callback function, so that it can be referenced afterwards.
>
> Moreover, in this case it would be unnecessary to use `this.setArray
> ( jQuery.makeArray(selector) )` in the `init` method, you could just
> check if it's a flyweight object and simply create a new object with
> the element.
>
> On Jul 22, 12:49 pm, Ricardo <ricardob...@gmail.com> wrote:
>
>
>
> > This seems pointless to me. You can create a new jQ object from 'this'
> > anytime you want - and only when you want, avoiding the overhead.
> > Would be useful if $this referred to the whole collection being
> > iterated, not the current element in the loop.
>
> > cheers
> > ricardo
>
> > On Jul 21, 12:14 am, Yehuda Katz <wyc...@gmail.com> wrote:
>
> > > At the moment, traversal callbacks, like the ones passed to
> > > find/filter/etc.
> > > take a single "index" parameter. I'd like to propose that they are unified
> > > with .each as follows:
> > > $("div").filter(function(i, self) {
> > > // stuff
>
> > > });
>
> > > As a separate concern, I'd like to discuss changing the second parameter
> > > in
> > > both to be a jQuery object. Obviously, it would need to be done via slow
> > > deprecation for .each, but I don't think it'd break all that much code:
>
> > > $("div").filter(function(i, self) {
> > > // self == $(this)
>
> > > })
>
> > > Thoughts?
>
> > > --
> > > Yehuda Katz
> > > Developer | Engine Yard
> > > (ph) 718.877.1325
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