On Thu, Feb 21, 2008 at 6:03 PM, Paul Lindner <[EMAIL PROTECTED]> wrote:
> Here's what's going on:
>
>
> YUI Compressor 2.3.5, 2008-02-08
> --------------------------------
>
> + Added a warning when more than one 'var' statement is used in a single
> scope.
> Automatic coalescence is extremely complicated, and would be unsafe if
> not
> done properly.
>
>
> At first I thought it was bogus, but it turns out it's correct. Try
> running this code and guess what the output is:
>
> for (var i=0; i< 10; i++) {
> document.write(i + " ");
> document.write(" ");
> }
> document.write("<br>result is " + i);
>
> 1 2 3 4 5 6 7 8 9
> result is 10
>
>
> Digging deeper I find that javascript's local scope is only local to
> the function. ... shudder ....
Not quite; it doesn't have a "local" scope, it only has closure scope (and a
function produces a closure). Javascript does not support anonymous scopes
as seen in languages such as java and C++ (what you're really doing when you
put brackets after a control statement). This is the same as in C and most
functional programming languages.
That being said, I disagree with the YUI compressor comment's assertion that
it's difficult, because there are at least two minifiers that I've used that
do it without issue (unfortunately, we can't use them on this project). I'd
love to see support for this added anyway though, as it's also got
performance benefits.
>
>
> On Thu, Feb 21, 2008 at 05:30:02PM -0800, Cassie wrote:
> > When running the shindig server these days we are now getting tons and
> tons
> > of js warnings. It seems to be linting for some very weird things, the
> most
> > prevalent being "Try to use a single 'var' statement per scope."
> >
> > Does anyone know how to turn off this particular warning? I don't think
> it
> > is useful at all (using more than one var per scope in js is perfectly
> > reasonable) and is hiding some of the hopefully more valuable warnings.
> >
> > Thanks!
> >
> > - Cassie
>
> --
> Paul Lindner
> hi5 Architect
> [EMAIL PROTECTED]
>
--
~Kevin
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