* Re: Structuring topics
[not found] <mailman.629.1271656654.4277.ntg-context@ntg.nl>
@ 2010-04-19 17:08 ` Vyatcheslav Yatskovsky
2010-04-19 18:29 ` Wolfgang Schuster
0 siblings, 1 reply; 5+ messages in thread
From: Vyatcheslav Yatskovsky @ 2010-04-19 17:08 UTC (permalink / raw)
To: ntg-context
Hi Wolfgang,
> title=yes,
> titleleft=,
> titleright=,
Yeah, thanks! That's the title that makes it!
Concerning \define... The answer is too witty for me, so I will leave
the wiki page untouched.
--
Best Regards,
Vyatcheslav Yatskovsky
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* Re: Structuring topics
2010-04-19 17:08 ` Structuring topics Vyatcheslav Yatskovsky
@ 2010-04-19 18:29 ` Wolfgang Schuster
2010-04-19 19:15 ` \define... (was: Re: Structuring topics) Peter Münster
0 siblings, 1 reply; 5+ messages in thread
From: Wolfgang Schuster @ 2010-04-19 18:29 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 19.04.10 19:08, schrieb Vyatcheslav Yatskovsky:
> Concerning \define... The answer is too witty for me, so I will leave
> the wiki page untouched.
What's the problem with my answer, i described differences between \def
and \define
and the most important one is point one, i'll show it to you in two examples
1. \def
\starttext
\def\hans{hans}
\def\hans{taco}
\hans
\stoptext
the output of this example is 'taco' because the second \def statement
overides the first
2. \define
\starttext
\define\hans{hans}
\define\hans{taco}
\stoptext
the output now is 'hans' because \define checks whether a command with
the name \hans
is already defined, if this isn't true \hans is created with the content
'hans' while
in the second \define \hans is already available and nothing happens but
you get
a warning on the terminal
system : command \hans is already defined
to summary this you can say \def is for developers and \define for users
but this won't
work in all cases because \define can't create commands with optional
arguments :(
Wolfgang
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* \define... (was: Re: Structuring topics)
2010-04-19 18:29 ` Wolfgang Schuster
@ 2010-04-19 19:15 ` Peter Münster
2010-04-20 3:41 ` \define Wolfgang Schuster
0 siblings, 1 reply; 5+ messages in thread
From: Peter Münster @ 2010-04-19 19:15 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, Apr 19 2010, Wolfgang Schuster wrote:
> \starttext
> \define\hans{hans}
> \define\hans{taco}
> \stoptext
>
> the output now is 'hans' because \define checks whether a command with the
> name \hans is already defined
Hello Wolfgang,
Did you test it? The output is "taco" here on my system:
MTXrun | current version: 2010.04.16 21:08
Cheers, Peter
--
Contact information: http://pmrb.free.fr/contact/
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
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* Re: \define...
2010-04-19 19:15 ` \define... (was: Re: Structuring topics) Peter Münster
@ 2010-04-20 3:41 ` Wolfgang Schuster
0 siblings, 0 replies; 5+ messages in thread
From: Wolfgang Schuster @ 2010-04-20 3:41 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 19.04.10 21:15, schrieb Peter Münster:
> On Mon, Apr 19 2010, Wolfgang Schuster wrote:
>
>> \starttext
>> \define\hans{hans}
>> \define\hans{taco}
>> \stoptext
>>
>> the output now is 'hans' because \define checks whether a command with the
>> name \hans is already defined
>>
> Hello Wolfgang,
>
> Did you test it? The output is "taco" here on my system:
> MTXrun | current version: 2010.04.16 21:08
>
no i didn't test it
context has two different versions of \define, there is one in
syst-ext.mkii/syst-aux.mkiv
which has no parameters but prevents you from overwriting a existing
command (there \redefine
with allows this) and another one in core-sys.mkii/mkiv which replace
the first one and has
support for parameters but replace on the other side the old definition
(you get only the
terminal message)
the question is, which behavious is correct, replace the old macro or
keep it, in my
opinion \define should leave the old definition untouced and \redefine
should be used
in this case (but we need a version with parameters)
Wolfgang
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___________________________________________________________________________________
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[not found] <mailman.629.1271656654.4277.ntg-context@ntg.nl>
2010-04-19 17:08 ` Structuring topics Vyatcheslav Yatskovsky
2010-04-19 18:29 ` Wolfgang Schuster
2010-04-19 19:15 ` \define... (was: Re: Structuring topics) Peter Münster
2010-04-20 3:41 ` \define Wolfgang Schuster
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2010-04-20 13:38 ` \define Vyatcheslav Yatskovsky
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