Quite weird but interesting:
if (+$foo){
// got elements
}
:)
On Jul 23, 7:38 pm, "Michael Geary" <m...@mg.to> wrote:
> I'm with you there.
>
> You know how I love to simplify code. If I learned that you didn't have to
> say .length to get the length, then the very next thing I'd do would be to
> try to simplify this code that I write so often:
>
> var $foo = $('.foo');
> if( $foo.length ) {
> // got some elements
> }
>
> by changing it to:
>
> var $foo = $('.foo');
> if( $foo ) {
> // got some elements
> }
>
> :-(
>
> Ah well, nice idea, wasn't it. :-)
>
> -Mike
>
> p.s. Too bad there's no .booleanOf() or .toBoolean() method in JavaScript -
> then we could do this right!
>
> _____
>
> From: John Resig
>
> I'm hesitant to add that (I've definitely thought about it, in the past)
> because .valueOf() doesn't cover all comparison cases.
>
> obj > obj2 works (as you noted)
> but if ( obj ) {} doesn't (it always returns true)
>
> Additionally, in Firebug, the result shows up as a number rather than
> something more useful (like a list of elements).
>
> --John
>
> On Thu, Jul 23, 2009 at 2:06 PM, James Padolsey
>
> <jamespadol...@googlemail.com> wrote:
>
> Just a thought; this would be quite useful IMO:
>
> var paras = $('p'), uls = $('ul');
> if (paras > uls) {
> // ...
>
> }
>
> I know it's not quite as readable (or as semantic) as:
>
> if (paras.length > uls.length) {
> // ...
>
> }
>
> but still, it's one of those things that may as well be added, just
> for the few situations where it may be useful.
>
> jQuery.fn.valueOf = function(){return this.length;};
>
> Unless it's got some other valid use (with jQuery)...?
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