Re: Here's the link

http://www.svendtofte.com/code/learning_venkman/basics.php


"7stud" <[email protected]> wrote in message
news:[email protected]...
> Hi,
>
> I'm trying to do an example in the Javascript debugger tutorial here(page
3
> "Basic Debugging"):
> http://www.svendtofte.com/code/lear...kman/basics.php
>
> Here is the example script:
> Code:
>
> 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>
>
>
>
> I clicked the Stop button in the debugger and reloaded the script, and
Line
> 4 was highlighted in yellow(the tutorial says it should be line 3). I
typed
> 'a' into the Interactive Session input line, and hit return. I got an
error
> message sayng 'a' was not defined. So far, so good.
>
> I clicked on Step Into and then line 5 was highlighted. I typed 'a' into
the
> Interactive Session input line again, and hit return. I got this:
>
> < 001: a
> >$[0] = [void] void
>
> The tutorial says I should get a value of 1 for a. That doesn't appear to
be
> giving me a value of 1 for a.
>
> Next, I clicked Step Into again, and line 9) was highlighed in yellow. I
> typed in 'a' again just to see what would happen, and I got the same
thing:
>
> < 0001: a
> >$[0] = [void] void
>
> Once again, it doesn't appear that's a value of 1 for a. I typed in 'b',
and
> as expected I got an error saying b was not defined. Then, I typed in
> 'test(a)'. The tutorial says I should've got:
>
> passed : 1
>
> for test(a). But, I got:
>
> <0001: test(a)
> > $[1] = [string] "passed : undefined"
>
> What the heck is going on?
>
> I clicked Step Into again and it jumped up to line 4). Huh? Why not line
5)?
> I entered 'a' in again, and this is what I got again:
>
> < 0001: a
> >$[0] = [void] void
>
> I clicked Step Into again and advanced to line 5). I typed 'a' in again:
>
> <0001: a
> >$[0] = [integer] 1
>
> Finally!! A value of 1 for 'a'. Can anyone explain this debugger's
behavior?
> Why no value for 'a' sooner?
>
> Then, when I click Step Into successively after that, this is what
happens:
>
> line 9)
> line 6)
> line 7)
> line 9)
> line 10)
>
> It just doesn't seem to make sense. The whole sequence is:
>
> 4)
> 5)
> 9)
>
> 4)
> 5)
> 9)
>
> 6)
> 7)
> 9)
> 10)
>