I also read about using $ or j if you're variable stores a jQuery
object.
Maybe this might sound stupid, but what if you first do something like
this:
var $showFeedback = $('#showFeedback' +spanIdNo);
(or var jShowFeedback = $('#showFeedback' +spanIdNo); respectively)
And if you then want to store the height of that element, do you use $
or j again (-> $showFeedbackHeight = $showFeedback.height();), or do
you use a "regular" variable name because it's not a jQuery object but
an attribute?
Maybe I'm just splitting hairs... :)
Cheers
On 2 Jul., 21:42, James <james.gp....@gmail.com> wrote:
> Not sure if there is a best practices page on the jquery domain
> itself, but there are a lot of blog entries about this stuff. Sorry I
> don't have any recommended links though. I just try to remember them
> all. :p
>
> Sorry my example was too simple, but it seems like you got the idea.
>
> Like many programming languages, storing something that will be
> accessed frequently is good to store/cache in a variable.
> For example:
> $fields = $("input[type=text][name^=field_][value!=test]");
>
> Calling $("input[type=text][name^=field_][value!=test]") everytime you
> want to work with it will hit jQuery harder since it has to walk
> through the DOM everytime to look for matching elements.
>
> $fields = $("input[type=text][name^=field_][value!=test]");
> $fields.attr('disabled','disabled');
> $fields.each(function() { ... });
> $fields.val('');
> $fields.removeAttr('disabled');
>
> Also, it makes code easier to read. :)
>
> On Jul 2, 9:04 am, expresso <dschin...@gmail.com> wrote:
>
> > Ah! makes sense. Because a lot of times I can't distinguish between
> > something in plain JavaScript and something that is a jQuery object.
> > Good to know. I'll make sure I do the same once I start really
> > getting on board with the jQuery syntax. It's a VERY good practice on
> > variables and so I wonder is there a "Best Practices For jQuery" on
> > the jquery site that I'm missing? that would be awesome if there
> > was. If not, how about someone start one and have it be either
> > moderated or have the best practices come straight from the jQuery
> > team. Accept request to put in a new standard and have the team
> > approve/disapprove.
>
> > this kind of stuff would help people like me tremendously to help me
> > ramp up quicker for newbies like me who wonder wtf is going on when
> > things like this are in place such as the example question I just
> > proposed.
>
> > On Jul 2, 1:57 pm, James <james.gp....@gmail.com> wrote:
>
> > > Yep, as MorningZ said, it's a good practice to use it to differentiate
> > > those that are storing a jQuery object.
>
> > > $myDiv = $("#div_1");
> > > $myDiv.hide();
>
> > > It's easier to tell that you're working with a jQuery object.
> > > Otherwise, it's just a regular variable.
>
> > > On Jul 2, 8:51 am, MorningZ <morni...@gmail.com> wrote:
>
> > > > "obviously I think 2nd is a jQuery variable? If that's the case why
> > > > should I care and where is the docs on that? "
>
> > > > It just seems to be common practice by a lot of jQuery people smarter
> > > > than us to signify it's a jQuery object stored in that variable, it
> > > > has zero to do with jQuery itself per se
>
> > > > On Jul 2, 2:29 pm, Michael Lawson <mjlaw...@us.ibm.com> wrote:
>
> > > > > Just to addon to what Waseem here has said:
>
> > > > > When you are using the default jQuery library, the variable $ is set
> > > > > to the
> > > > > value of jQuery, which creates a shortcut for you so that you don't
> > > > > have to
> > > > > keep typing jQuery everytime you want to access it, you can just type
> > > > > $.
>
> > > > > cheers
>
> > > > > Michael Lawson
> > > > > Development Lead, Global Solutions, ibm.com
> > > > > Phone: 1-276-206-8393
> > > > > E-mail: mjlaw...@us.ibm.com
>
> > > > > 'Examine my teachings critically, as a gold assayer would test gold.
> > > > > If you
> > > > > find they make sense, conform to your experience, and don't harm
> > > > > yourself
> > > > > or others, only then should you accept them.'
>
> > > > > From: waseem sabjee <waseemsab...@gmail.com>
> > > > >
>
> > > > > To: jquery-en@googlegroups.com
> > > > >
>
> > > > > Date: 07/02/2009 02:26 PM
> > > > >
>
> > > > > Subject: [jQuery] Re: var $varname
> > > > >
>
> > > > > its not really a jquery variable
>
> > > > > in standard js you can say
> > > > > var $myvar = "hello";
> > > > > and
> > > > > var myvar = "hello";
>
> > > > > both will work the same
>
> > > > > you can access jquery using either the $ or JQuery
> > > > > like
>
> > > > > $("#myid").hide();
> > > > > JQuery("#myid").hide();
>
> > > > > in a line of the JQuery library code you would see something like
>
> > > > > JQuery = window.JQuery = window.$ ...
>
> > > > > your could say its like short hand code
>
> > > > > instead of saying JQuery("") al the time you can just say $("")
>
> > > > > On Thu, Jul 2, 2009 at 8:18 PM, expresso <dschin...@gmail.com> wrote:
>
> > > > > what's the difference between:
>
> > > > > var varname
>
> > > > > var $varname
>
> > > > > obviously I think 2nd is a jQuery variable? If that's the case why
> > > > > should I care and where is the docs on that?
>
> > > > > graycol.gif
> > > > > < 1KViewDownload
>
> > > > > ecblank.gif
> > > > > < 1KViewDownload
