> sure. Again, I don't see the need for such a thing as I don't use this > pattern so often... >
Agreed. I generally think its a bad pattern however it could be useful in more complex scenarios. It might be an interesting mechanism for sanity checking with lazy loading code. > > > On Tue, Apr 28, 2009 at 4:08 PM, nwhite (via Nabble) < > ml-user%2b93763-1341009...@...<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2737607&i=0> > > wrote: > >> >>> window.has('foo.bar') or something... >>> >> >> ah I like that. >> >> Window.implement({ >> has : function(prop){ >> var parts = prop.split('.'), obj = window; >> for(var i = 0; i < parts.length; i++){ >> obj = obj[parts[i]]; >> if(obj == undefined) return false; >> } >> return true; >> } >> }); >> >> >> >> >> >>> >>> >>> On Tue, Apr 28, 2009 at 2:55 PM, nwhite (via Nabble) < >>> ml-user%2b93763-1341009...@...<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2737486&i=0> >>> > wrote: >>> >>>> is there any issue with the $classExists function above? >>>> >>>> it seems to me it would be a little less verbose in some cases and >>>> clearer to understand. for example if I want to test for Request.JSONP >>>> >>>> if(!!window.Request && !!window.Request.JSONP ) // do something >>>> >>>> instead becomes: >>>> >>>> if($classExists('Request.JSONP') // do something >>>> >>>> On Tue, Apr 28, 2009 at 2:47 PM, nutron >>>> <anut...@...<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2737207&i=0> >>>> > wrote: >>>> >>>>> there's no point in doing this inside a conditional. ! and !! perform >>>>> coercion, as does the conditional. >>>>> >>>>> >>>>> On Tue, Apr 28, 2009 at 2:38 PM, Sanford Whiteman [Mobile] (via Nabble) >>>>> <ml-user%2b64022-1734430...@...<http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2737159&i=0> >>>>> > wrote: >>>>> >>>>>> >>>>>> > Am I missing something or does this seem to be counter intuitive? >>>>>> >>>>>> if (!!window.myClass) ... >>>>>> >>>>>> !! coerces the the value to real boolean, which I like better than >>>>>> >>>>>> leaving it falsy/truthy. >>>>>> >>>>>> --Sandy >>>>>> >>>>>> >>>>> The MooTools Tutorial: www.mootorial.com Clientcide: >>>>> www.clientcide.com >>>>> >>>>> ------------------------------ >>>>> View this message in context: Re: [Moo] Re: question about >>>>> $defined<http://n2.nabble.com/-Moo--question-about-%24defined-tp2736644p2737159.html> >>>>> Sent from the MooTools Users mailing list >>>>> archive<http://n2.nabble.com/MooTools-Users-f660466.html>at Nabble.com. >>>>> >>>> >>>> >>> The MooTools Tutorial: www.mootorial.com Clientcide: www.clientcide.com >>> >>> ------------------------------ >>> View this message in context: Re: [Moo] Re: question about >>> $defined<http://n2.nabble.com/-Moo--question-about-%24defined-tp2736644p2737486.html> >>> Sent from the MooTools Users mailing list >>> archive<http://n2.nabble.com/MooTools-Users-f660466.html>at Nabble.com. >>> >> >> > The MooTools Tutorial: www.mootorial.com Clientcide: www.clientcide.com > > ------------------------------ > View this message in context: Re: [Moo] Re: question about > $defined<http://n2.nabble.com/-Moo--question-about-%24defined-tp2736644p2737607.html> > Sent from the MooTools Users mailing list > archive<http://n2.nabble.com/MooTools-Users-f660466.html>at Nabble.com. >
