Re: Question for you?

"7stud" <[email protected]> Wed, 3 Nov 2004 12:34:53 -0700
Newsgroups	gmane.comp.mozilla.devel.jsdebugger
Message-ID	<[email protected]>
Hi,

> Yup, I got what you got :-) I thought maybe it's an off-by-one error in
> highlighting the current line, but even stepping further didn't set a to
1.

Thanks for confirming that.

> I've given up on Venkman.

Me too.  I'm not sure why there isn't a forum at Mozilla specifically for
Venkman.  For some reason, I can only see the last 3 or 4 messages for this
group using Outlook Express.

Take care.




"David Huynh" <[email protected]> wrote in message
news:[email protected]...
> Yup, I got what you got :-) I thought maybe it's an off-by-one error in
> highlighting the current line, but even stepping further didn't set a to
1.
>
> I've given up on Venkman. You might want to try jslib which has debug
> printing functions (jslib.mozdev.org). These functions output to the
> Javascript console.
>
> Best,
>
> David
>
>
> 7stud wrote:
> > "David Huynh" <[email protected]> wrote in message
> > news:[email protected]...
> >
> >>getStore() is actually defined in piggy-bank.js, which is linked in
> >>through the first <script> element.
> >>
> >>It turned out that there was an exception thrown in getStore().
> >>Regardless, Venkman didn't help me locate that. Half of the times I
> >>wasn't sure if the debugger was quirky or my code was erroneous.
> >>Consequently, I have abandoned Venkman altogether and resorted to
> >>alert() and incremental code writing. It's a shame, really, and I can
> >>sympathize with your experience with Venkman.
> >>
> >>Best regards,
> >>
> >>David
> >>
> >
> >
> > Hi,
> >
> > I have tried that same tutorial you linked, and nothing seems to work
> > according to the way the tutorial says it should.  For instance, on page
3
> > of the tutorial
> >
> > http://www.svendtofte.com/code/learning_venkman/basics.php
> >
> >  you step through this example:
> >
> > 3) <script>
> > 4) var a = 1;
> >
> > 5) function test(a) {
> > 6)    var t = "passed : ";
> > 7)    return t + a;
> > 8) }
> >
> > 9) var b = test(a);
> > 10) document.write("<p>" + b + "</p>");
> > 11) </script>
> >
> > When I stepped from line 4 to line 5, and then typed 'a' into the
> > Interactive Session input line, and hit return, I got this:
> >
> > < 001: a
> >
> >>$[0] = [void] void
> >
> >
> > The tutorial says I should get a value of 1 for a.  I've used other
> > debuggers before, and I would expect the value of a to be 1, not
undefined.
> > Does that happen to you too?
> >
> >
> >
> >
> >>7stud wrote:
> >>
> >>>><html>
> >>>><head>
> >>>><script type="application/x-javascript"
> >>>>src="piggy-bank.js"/>
> >>>><script language="javascript">
> >>>>function getStore2() {
> >>>>debugger
> >>>>getStore();
> >>>>}
> >>>></script>
> >>>></head>
> >>>><body>
> >>>><span onclick="alert('a'); getStore2();">click me</span>
> >>>></body>
> >>>></html>
> >>>
> >>>
> >>>Here, I'll be Venkman for you:
> >>>
> >>>Error: line 8: GetStore() does not exist.
> >>>
> >>>The rest of your post is unintelligible, although I too have used
> >
> > debuggers
> >
> >>>before, and Venkman does not work for me with Firefox1.0 on Win98.  If
I
> >>>have two lines like this:
> >>>
> >>>1)var a=10;
> >>>2)var b = 10;
> >>>
> >>>After I step from line 1 to line 2, the debugger says a is undefined.
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>"David Huynh" <[email protected]> wrote in message
> >>>news:[email protected]...
> >>>
> >>>
> >>>>Hi,
> >>>>
> >>>>I'm having problem using the JS debugger. I'm reading this guide
> >>>>http://www.svendtofte.com/code/learning_venkman/basics.php
> >>>>to find out how to use the debugger, and although I've used plenty of
> >>>>debuggers in the past, I can't figure out how this Venkman thing
works.
> >>>>
> >>>>I have a pretty simple HTML file here:
> >>>>
> >>>>
> >>>>And I followed these steps:
> >>>>1. start Mozilla
> >>>>2. open the JS debugger and click on the Stop button (gosh, I didn't
> >>>>expect to click "stop" to _start_ my debugging task)
> >>>>3. load the HTML file in Mozilla browser
> >>>>4. go to the JS debugger and set the right evaluation context
> >>>>5. refresh the browser. The JS debugger does break into the script
file
> >>>>piggy-bank.js (containing a bunch of functions) and I let it runs
> >
> > through.
> >
> >>>>6. click on the span "click me". The alert "a" comes up but then
nothing
> >>>>else happens. It doesn't matter if I set any breakpoint in getStore2()
> >>>>or getStore(). The debugger keyword doesn't help either.
> >>>>
> >>>>Then I got clever and put in a function call to getStore() at the end
of
> >>>>piggy-bank.js so that step #5 above would let me debug the function
> >>>>getStore(). The debugger does go into getStore(), which is something
> >>>>like this:
> >>>>
> >>>>function getStore() {
> >>>>debugger
> >>>>var RDF = Components.classes['@mozilla.org/rdf/rdf-service;1']
> >>>>.getService(Components.interfaces.nsIRDFService);
> >>>>...
> >>>>}
> >>>>
> >>>>I hit F11 to step into at every point, but then when it reaches the
> >>>>assignment statement (RDF = ...), F11 seems to behave like F5--Venkman
> >>>>does not stop at the next statement. Frankly I don't know where it
goes
> >>>>after I hit F11 at the assignment statement.
> >>>>
> >>>>Then I got even more clever and tried to paste the body of getStore()
in
> >>>>the middle of step #5 above. But alas, the little textbox in Venkman
> >>>>only takes one line of text!
> >>>>
> >>>>I'm running Mozilla 1.7.2, Venkman 0.9.81. Venkman seems to be choking
> >>>>the daylight out of Mozilla.
> >>>>
> >>>>
> >>>>
> >>>>So I have 2 questions:
> >>>>
> >>>>1. What should I do if I want to debug the function getStore()?
> >>>>
> >>>>2. How did those folks that develop various Mozilla-based applications
> >>>>refrain from killing themselves with this kind of debugging support?
> >>>>Seriously, I have great respect for the Mozilla product from an
> >>>>engineering standpoint, but the documentation and developer support
> >>>>are... Are they using some other tricks to debug their JS code?
> >>>>
> >>>>Forgot to mention, the HTML file was originally a XUL. But Venkman
> >>>>doesn't even seem to handle XUL...
> >>>>
> >>>>Thanks in advance!
> >>>>
> >>>>David
> >>>
> >>>
> >