Ariel, thanks for the link, i quickly read it and it seems other people
thought about that idea before.
Anyway, my vision is more semantic and less complicated, since with a
callback inside the if you can define many expressions, do operations, and
then return true or false.
What I mean is that your if().hasClass is limited to one or more jQuery
operation, while if(callbackInScope) has no limits at all and inside you can
return $(this).hasClass("whatever").
In any case and for performances improvement, for the if else I would create
a jQuery istance instead of callback
this.if = jQuery(this);
this.if._condition = 1; // as first condition to evaluate (make
if(this._condition) check simpler)
so te call will be something like
$(elm).on("click")
.if
.hasClass('foo')
.then()..
As I said before, this implementation suffer about And or Or possibilities
$(elm).on("click")
.if
.hasClass('foo')
.And
.text()
.then()..
as last limitation, you cannot compare properties:
if.text() == "something"
for this reason I suppose that the callback inside the If(whateverCallback)
that as implementation will be simply a filter inside the method if
something like
If:function(fn){ // set first list of elements
this._succeded = jQuery(this).filter(fn);
return this._succeded;
},
ElseIf:function(fn){ // exclude precedent elements
var _succeded = this._succeded,
result = jQuery(this).filter(fn).filter(function(i, elm){return
~_succeded.indexOf(elm)});
this._succeded =
this._succeded.concat(Array.prototype.slice.call(result, 0));
return result;
},
Else:function(){ // return only last list of elements
var _succeded = this._succeded;
returh this.filter(function(i, elm){return ~_succeded.indexOf(elm)});
}
I did not test above code, it is only to demonstrate the ligic behind. It
does not seem to be that complicated but for sure it is more intense for CPU
and could be more problematic for mem leaks
Regards
On Sun, Oct 26, 2008 at 11:42 PM, Ariel Flesler <[EMAIL PROTECTED]> wrote:
> Andrea
>
> The if/else thing seems to make the code larger I think. If you need to
> pass a lambda to If, then another to else of elseIf...
>
> It's an interesting idea and it came up before. I'm not so sure it's brings
> clarity to code, though.
>
> Maybe .if().hasClass('foo').then()... but uhmm... seems to complicated.
>
> Here you have the old post I mentioned, maybe it gives you some cool idea
> :)
>
> http://groups.google.com/group/jquery-en/browse_thread/thread/43a69fa41f6e7089/6cebfee318992fe6
>
> Brandon disagreed back then as well... that's a good thing I think :D
>
>
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