first steps with \dosingleempty

first steps with \dosingleempty

[Goebel, Juergen]

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Hi,

Regarding the following example I've got two questions.

(1) Why don't I ever see the argument #2 in the output?
(2) What do I have to do to suppress the unwanted space
after the end of the output of this macro (as can be seen
in the result before the following comma)?

Regards,

Juergen


\def\Geb{\dosingleempty\doMyGeb}
\def\doMyGeb[#1]#2#3{, x %
   \iffirstargument%
      Aha
   \else
     \ifsecondargument%
       #2
     \else%
       ... %C%
     \fi
   \fi
   \ifthirdargument%
     #3%
   \else%
     ...%
   \fi}

\starttext

\Geb{Ulm}{11. 9. 2008} % should deliver x Ulm 11. 9. 2008
\Geb[Ulm]{Ulm}{11. 9. 2008} % should deliver x Aha Ulm 11. 9. 2008
\Geb{}{11. 9. 2008} % should deliver x ... 11. 9. 2008
\Geb{Ulm}{} % should deliver x Ulm ...
\Geb{}{} % should deliver x ...

\stoptext





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Re: first steps with \dosingleempty

[Hans Hagen]

Goebel, Juergen wrote:
> Hi,
> 
> Regarding the following example I've got two questions.
> 
> (1) Why don't I ever see the argument #2 in the output?
> (2) What do I have to do to suppress the unwanted space
> after the end of the output of this macro (as can be seen
> in the result before the following comma)?
> 
> Regards,
> 
> Juergen
> 
> 
> \def\Geb{\dosingleempty\doMyGeb}
> \def\doMyGeb[#1]#2#3{, x %
>    \iffirstargument%
>       Aha
>    \else
>      \ifsecondargument%
>        #2
>      \else%
>        ... %C%
>      \fi
>    \fi
>    \ifthirdargument%
>      #3%
>    \else%
>      ...%
>    \fi}
> 
> \starttext
> 
> \Geb{Ulm}{11. 9. 2008} % should deliver x Ulm 11. 9. 2008
> \Geb[Ulm]{Ulm}{11. 9. 2008} % should deliver x Aha Ulm 11. 9. 2008
> \Geb{}{11. 9. 2008} % should deliver x ... 11. 9. 2008
> \Geb{Ulm}{} % should deliver x Ulm ...
> \Geb{}{} % should deliver x ...
> 
> \stoptext

\unexpanded\def\Geb{\dosingleempty\doMyGeb}

\def\doMyGeb[#1]#2#3%
   {, x \iffirstargument Aha \fi
    \doifsomethingelse{#2}{#2}{...}\space
    \doifsomethingelse{#3}{#3}{...}%
    \par}


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Re: first steps with \dosingleempty

[Goebel, Juergen]

Hans Hagen wrote:

> \unexpanded\def\Geb{\dosingleempty\doMyGeb}
> 
> \def\doMyGeb[#1]#2#3%
>    {, x \iffirstargument Aha \fi
>     \doifsomethingelse{#2}{#2}{...}\space
>     \doifsomethingelse{#3}{#3}{...}%
>     \par}

Thanks a lot, elegant and much shorter.
But, alas, I can't test it yet since the
\doifsomethingelse seems to be somewhat
newer.  My oldtimer (according to Hraban)
shall really be updated during the next 
days or weeks ... 

Does anyone know when the TL 2008 will be
distributed to the DANTE-members?

Juergen
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Re: first steps with \dosingleempty

[Patrick Gundlach]

Hi,

> Does anyone know when the TL 2008 will be
> distributed to the DANTE-members?

very likely, but you should consider trying out the official context
distribution:

http://distribution.contextgarden.net/


Patrick
-- 
ConTeXt wiki and more: http://contextgarden.net
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Re: first steps with \dosingleempty

[Goebel, Juergen]

Patrick Gundlach wrote:

> http://distribution.contextgarden.net/

Hmm, is there a zip-file or something like this, which 
I can download via http or ftp for use with windows?  I 
think of something like context-setup-mswin.zip, only 
not minimal.  I would very much appreciated a link to
this resource.

TIA,

Juergen
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Re: first steps with \dosingleempty

[Wolfgang Schuster]

On Thu, Sep 11, 2008 at 12:28 PM, Goebel, Juergen
<juergen.goebel@eads.com> wrote:
> Patrick Gundlach wrote:
>
>> http://distribution.contextgarden.net/
>
> Hmm, is there a zip-file or something like this, which
> I can download via http or ftp for use with windows?  I
> think of something like context-setup-mswin.zip, only
> not minimal.  I would very much appreciated a link to
> this resource.

http://www.pragma-ade.com/download-1.htm

mswincontext.zip

Wolfgang
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Re: first steps with \dosingleempty

[Wolfgang Schuster]

On Thu, Sep 11, 2008 at 9:56 AM, Goebel, Juergen
<juergen.goebel@eads.com> wrote:
> Hans Hagen wrote:
>
>> \unexpanded\def\Geb{\dosingleempty\doMyGeb}
>>
>> \def\doMyGeb[#1]#2#3%
>>    {, x \iffirstargument Aha \fi
>>     \doifsomethingelse{#2}{#2}{...}\space
>>     \doifsomethingelse{#3}{#3}{...}%
>>     \par}
>
> Thanks a lot, elegant and much shorter.
> But, alas, I can't test it yet since the
> \doifsomethingelse seems to be somewhat
> newer.  My oldtimer (according to Hraban)
> shall really be updated during the next
> days or weeks ...

You could use \doifelsenothing with reverse order for the second
and third argument, \doifsomethingelse was included after the
TL 2008 ConTeXt release.

Wolfgang
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