Re: checking for an undefined constant

Re: checking for an undefined constant

[Vyatcheslav Yatskovsky]

Thank you all for such a variety of solutions! Gonna look into it. ))

>> %D \macros
>> %D   {doifundefined,doifdefined,
>> %D    doifundefinedelse,doifdefinedelse,
>> %D    doifalldefinedelse}
>> %D
>> %D The standard way of testing if a macro is defined is
>> %D comparing its meaning with another undefined one, usually
>> %D \type{\undefined}. To garantee correct working of the next
>> %D set of macros, \type{\undefined} may never be defined!
>> %D
>> %D \starttyping
>> %D \doifundefined      {string}    {...}
>> %D \doifdefined        {string}    {...}
>> %D \doifundefinedelse  {string}    {then ...} {else ...}
>> %D \doifdefinedelse    {string}    {then ...} {else ...}
>> %D \doifalldefinedelse {commalist} {then ...} {else ...}
>> %D \stoptyping
>> %D
>>
>> \doifdefined{Homeworks}{...}
>
 >
> Low level (etex) solutions:
>
> \ifdefined\Homeworks ... \fi
>
> \unless\ifx\Homeworks\undefined ... \fi

-- 
Best Regards,
Vyatcheslav Yatskovsky
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Re: two languages hyphenation

[Vyatcheslav Yatskovsky]

Hi Hans,

>> Since they are written in two different scripts you can theoretically
>> enable them simultaneously (but I'm not sure if this is supported by
>> default).
>
> interesting and quite trivial to support ... do you have a test file?

I suspect to use \mainlanguage[en,ua] command, if it's possible

This my test file:

\setupbodyfont[mscore,rm,24pt]
%\mainlanguage[en] %only English hyphens
%\mainlanguage[ua] %only Ukrainian hyphens
\mainlanguage[en,ua]  %%only English hyphens, no Uk

\starttext

\dorecurse{4}{Для мене велика честь бути з вами сьогодні на випускному в 
одному з найкращих університетів світу. Зізнаюся, я так і не закінчив 
коледж - і ніколи не був ближче до випускного, ніж зараз. І я хочу 
розповісти вам три історії зі свого життя. Три історії і все. }

\dorecurse{4}{I am honored to be with you today at your commencement 
from one of the finest universities in the world. I never graduated from 
college. Truth be told, this is the closest I've ever gotten to a 
college graduation. Today I want to tell you three stories from my life. 
That's it. No big deal. Just three stories.}

\stoptext

-- 
Best Regards,
Vyatcheslav Yatskovsky
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Re: checking for an undefined constant

[Wolfgang Schuster]

Am 25.06.10 15:39, schrieb Aditya Mahajan:
> On Fri, 25 Jun 2010, Vyatcheslav Yatskovsky wrote:
>
>> Hi,
>>
>> Now I check for an undefined constant like this:
>>
>> \ifx \Homeworks \undefined \else Home works -- {\Homeworks} \fi
>>
>> The useful part is in "else" clause.  How to swap this check so that 
>> "else" is not needed?
>>
>> From syst-gen.mkii
>
> %D \macros
> %D   {doifundefined,doifdefined,
> %D    doifundefinedelse,doifdefinedelse,
> %D    doifalldefinedelse}
> %D
> %D The standard way of testing if a macro is defined is
> %D comparing its meaning with another undefined one, usually
> %D \type{\undefined}. To garantee correct working of the next
> %D set of macros, \type{\undefined} may never be defined!
> %D
> %D \starttyping
> %D \doifundefined      {string}    {...}
> %D \doifdefined        {string}    {...}
> %D \doifundefinedelse  {string}    {then ...} {else ...}
> %D \doifdefinedelse    {string}    {then ...} {else ...}
> %D \doifalldefinedelse {commalist} {then ...} {else ...}
> %D \stoptyping
> %D
>
> So
>
> \doifdefined{Homeworks}{...}

Low level (etex) solutions:

\ifdefined\Homeworks ... \fi

\unless\ifx\Homeworks\undefined ... \fi

Wolfgang

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Re: checking for an undefined constant

[Aditya Mahajan]

On Fri, 25 Jun 2010, Vyatcheslav Yatskovsky wrote:

> Hi,
>
> Now I check for an undefined constant like this:
>
> \ifx \Homeworks \undefined \else Home works -- {\Homeworks} \fi
>
> The useful part is in "else" clause.  How to swap this check so that "else" 
> is not needed?
>
From syst-gen.mkii

%D \macros
%D   {doifundefined,doifdefined,
%D    doifundefinedelse,doifdefinedelse,
%D    doifalldefinedelse}
%D
%D The standard way of testing if a macro is defined is
%D comparing its meaning with another undefined one, usually
%D \type{\undefined}. To garantee correct working of the next
%D set of macros, \type{\undefined} may never be defined!
%D
%D \starttyping
%D \doifundefined      {string}    {...}
%D \doifdefined        {string}    {...}
%D \doifundefinedelse  {string}    {then ...} {else ...}
%D \doifdefinedelse    {string}    {then ...} {else ...}
%D \doifalldefinedelse {commalist} {then ...} {else ...}
%D \stoptyping
%D

So

\doifdefined{Homeworks}{...}

Aditya
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checking for an undefined constant

[Vyatcheslav Yatskovsky]

Hi,

Now I check for an undefined constant like this:

\ifx \Homeworks \undefined \else Home works -- {\Homeworks} \fi

The useful part is in "else" clause.  How to swap this check so that 
"else" is not needed?

Rgrds,
Vyatcheslav
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