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Re: Eye for bugs

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Michael F. Stemper wrote:

> On 01/10/2014 03:12 PM, Thomas 'PointedEars' Lahn wrote:
>> Michael F. Stemper wrote:
>>> On 01/06/2014 03:56 AM, jonas.thornvall@gmail.com wrote:
>>>> I find it very hard to spot logical errors when dealing with Writing
>>>> out to Canvas, normally i write out values from JavaScript with
>>>> document.write() line by line in the HTML document as i step thru loops
>>>> but using the canvas you just plot over values without implementing
>>>> plotout logic?
>>>>
>>>> Have anyone a good idea?
>>>
>>> O'Reilly does.
>>>
>>> You can create a window for trace messages, using this technique
>>> (straight from the Javascript Rhino book).
>>
>> I do not see the point of this error-prone, incompatible approach when
>> you have console.log() & friends.
> 
> I never heard of it before. However, I just tried it, and it's
> definitely a superior alternative. Would I be right in guessing that
> this is something that was added after the third edition of the Rhino
> book was published in 1996?

It is unlikely that any edition of a “Javascript Rhino book”, much less the 
third one, was published in 1996 CE.  The Rhino project, for a JavaScript™ 
engine written in Java, was started at Netscape in 1997. [1]  Either your 
“Rhino” does not refer to the Rhino project, or you may mean *2006* (that 
would correspond with a release in the Rhino 1.6 series [2a]).  If you mean 
the book “JavaScript: The Definitive Guide”, by David Flanagan, which has a 
rhinoceros on its cover and whose *first* edition was published in 
1996 [2b], you should read the reviews that are referred from the FAQ for 
comp.lang.javascript, <http://PointedEars.de/faq>.

It is possible that console.log() or something like it has been available at 
least since the release of Mozilla 1.0 in 2002 [3], with the -console 
switch, Venkman, the JavaScript Debugger [4], or similar.  However, it was 
not before the release of Firebug – I had beta-tested and reported on 
FireBug 0.4, as it was called when Joe Hewitt was developing it in 
2006 [5] – that in-browser debugging and the “console” object came into 
widespread use.  After there was Firebug, other browser vendors added built-
in developer tools that mirrored its functionality: Chrome Dev Tools, Opera 
Dragonfly, and IE Developer Tools; in that order, I think.

Finally, with the release of Firefox 4.0/Gecko 2.0 on 2011-03-22, the built-
in Error Console was replaced with the built-in Web Console which also 
supported console.log(). [6]

__________
[1]  <https://developer.mozilla.org/en-US/docs/Rhino/History>
[2a] <https://developer.mozilla.org/en-US/docs/Rhino/Downloads_archive>
[2b] <http://shop.oreilly.com/product/9780596805531.do>
[3]  <http://blog.mozilla.org/press/2002/06/mozilla-org-launches-mozilla-1-0/>
[4]  <https://developer.mozilla.org/en/docs/Venkman>
[5]  <http://en.wikipedia.org/wiki/Firebug_(software)>
[6]  <https://developer.mozilla.org/en-US/Firefox/Releases/4>
-- 
PointedEars

Twitter: @PointedEars2
Please do not Cc: me. / Bitte keine Kopien per E-Mail.

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Eye for bugs jonas.thornvall@gmail.com - 2014-01-06 01:56 -0800
  Re: Eye for bugs jonas.thornvall@gmail.com - 2014-01-08 01:48 -0800
    Re: Eye for bugs jonas.thornvall@gmail.com - 2014-01-10 06:48 -0800
      Re: Eye for bugs Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-10 16:20 +0100
  Re: Eye for bugs "Michael F. Stemper" <michael.stemper@gmail.com> - 2014-01-10 14:26 -0600
    Re: Eye for bugs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-10 22:12 +0100
      Re: Eye for bugs "Michael F. Stemper" <michael.stemper@gmail.com> - 2014-01-10 18:15 -0600
        Re: Eye for bugs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-11 15:53 +0100
    Re: Eye for bugs Tim Streater <timstreater@greenbee.net> - 2014-01-10 23:09 +0000
      Re: Eye for bugs "Michael F. Stemper" <michael.stemper@gmail.com> - 2014-01-10 18:17 -0600

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