* test for (negative) number
@ 2012-08-20 16:00 Peter Rolf
2012-08-20 18:11 ` Sietse Brouwer
0 siblings, 1 reply; 7+ messages in thread
From: Peter Rolf @ 2012-08-20 16:00 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi,
I used '\doifnumberelse' to validate some macro parameters (angle).
Sadly it does not work with negative numbers. Is there a similar macro,
that also supports negative values?
Example:
\doifnumberelse {45}{yes}{no}% yes
\doifnumberelse{-45}{yes}{no}% no
Greetings, Peter
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* Re: test for (negative) number
2012-08-20 16:00 test for (negative) number Peter Rolf
@ 2012-08-20 18:11 ` Sietse Brouwer
2012-08-21 6:32 ` Procházka Lukáš
2012-08-21 15:13 ` Procházka Lukáš
0 siblings, 2 replies; 7+ messages in thread
From: Sietse Brouwer @ 2012-08-20 18:11 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi Peter,
I recommend using the following handy little idiom:
\ctxlua{commands.doifelse(-45 > 0)}{big}{small} % small
It lets you do all sorts of things that are tricky in TeX:
\ctxlua{ commands.doifelse( string.len( "-45" ) > 5 ) }{long}{short}
Cheers,
Sietse
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* Re: test for (negative) number
2012-08-20 18:11 ` Sietse Brouwer
@ 2012-08-21 6:32 ` Procházka Lukáš
2012-08-21 6:56 ` Wolfgang Schuster
2012-08-21 15:13 ` Procházka Lukáš
1 sibling, 1 reply; 7+ messages in thread
From: Procházka Lukáš @ 2012-08-21 6:32 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Mon, 20 Aug 2012 20:11:32 +0200, Sietse Brouwer <sbbrouwer@gmail.com> wrote:
> Hi Peter,
>
> I recommend using the following handy little idiom:
> \ctxlua{commands.doifelse(-45 > 0)}{big}{small} % small
>
> It lets you do all sorts of things that are tricky in TeX:
> \ctxlua{ commands.doifelse( string.len( "-45" ) > 5 ) }{long}{short}
>
> Cheers,
> Sietse
... Has been wikified -
"http://wiki.contextgarden.net/Command/doif..."
Lukas
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* Re: test for (negative) number
2012-08-21 6:32 ` Procházka Lukáš
@ 2012-08-21 6:56 ` Wolfgang Schuster
2012-08-21 9:24 ` Peter Rolf
0 siblings, 1 reply; 7+ messages in thread
From: Wolfgang Schuster @ 2012-08-21 6:56 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 21.08.2012 um 08:32 schrieb Procházka Lukáš <LPr@pontex.cz>:
>
> On Mon, 20 Aug 2012 20:11:32 +0200, Sietse Brouwer <sbbrouwer@gmail.com> wrote:
>
>> Hi Peter,
>>
>> I recommend using the following handy little idiom:
>> \ctxlua{commands.doifelse(-45 > 0)}{big}{small} % small
>>
>> It lets you do all sorts of things that are tricky in TeX:
>> \ctxlua{ commands.doifelse( string.len( "-45" ) > 5 ) }{long}{short}
>>
>> Cheers,
>> Sietse
>
> ... Has been wikified -
>
> "http://wiki.contextgarden.net/Command/doif…"
For functions in the commands namespace you can write e.g. \ctxcommand{doifelse(…)}{…}{…} instead of \ctxlua{commands.doifelse(…)}{…}{…}.
Wolfgang
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* Re: test for (negative) number
2012-08-21 6:56 ` Wolfgang Schuster
@ 2012-08-21 9:24 ` Peter Rolf
0 siblings, 0 replies; 7+ messages in thread
From: Peter Rolf @ 2012-08-21 9:24 UTC (permalink / raw)
To: ntg-context
Thanks for all the answers so far. The 'doifelse' should do the trick. I
was hoping for a system macro, but if there is none, I have to program
it myself. :-)
Peter
Am 21.08.2012 08:56, schrieb Wolfgang Schuster:
>
> Am 21.08.2012 um 08:32 schrieb Procházka Lukáš <LPr@pontex.cz>:
>
>>
>> On Mon, 20 Aug 2012 20:11:32 +0200, Sietse Brouwer <sbbrouwer@gmail.com> wrote:
>>
>>> Hi Peter,
>>>
>>> I recommend using the following handy little idiom:
>>> \ctxlua{commands.doifelse(-45 > 0)}{big}{small} % small
>>>
>>> It lets you do all sorts of things that are tricky in TeX:
>>> \ctxlua{ commands.doifelse( string.len( "-45" ) > 5 ) }{long}{short}
>>>
>>> Cheers,
>>> Sietse
>>
>> ... Has been wikified -
>>
>> "http://wiki.contextgarden.net/Command/doif…"
>
> For functions in the commands namespace you can write e.g. \ctxcommand{doifelse(…)}{…}{…} instead of \ctxlua{commands.doifelse(…)}{…}{…}.
>
> Wolfgang
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
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* Re: test for (negative) number
2012-08-20 18:11 ` Sietse Brouwer
2012-08-21 6:32 ` Procházka Lukáš
@ 2012-08-21 15:13 ` Procházka Lukáš
2012-08-21 16:42 ` Hans Hagen
1 sibling, 1 reply; 7+ messages in thread
From: Procházka Lukáš @ 2012-08-21 15:13 UTC (permalink / raw)
To: mailing list for ConTeXt users
... I also found another solution reposter before:
----
\ctxlua{commands.testcase(condition)}
{ If true...}
{If false}
----
Note that both blocks (if-true and if-false) are mandatory.
Considering Wolfgang's last answer, it would be better to write:
----
\ctxcommand{testcase(condition)}
{ If true...}
{If false}
----
Lukas
On Mon, 20 Aug 2012 20:11:32 +0200, Sietse Brouwer <sbbrouwer@gmail.com> wrote:
> Hi Peter,
>
> I recommend using the following handy little idiom:
> \ctxlua{commands.doifelse(-45 > 0)}{big}{small} % small
>
> It lets you do all sorts of things that are tricky in TeX:
> \ctxlua{ commands.doifelse( string.len( "-45" ) > 5 ) }{long}{short}
>
> Cheers,
> Sietse
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
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* Re: test for (negative) number
2012-08-21 15:13 ` Procházka Lukáš
@ 2012-08-21 16:42 ` Hans Hagen
0 siblings, 0 replies; 7+ messages in thread
From: Hans Hagen @ 2012-08-21 16:42 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 21-8-2012 17:13, Procházka Lukáš wrote:
> .... I also found another solution reposter before:
>
> ----
> \ctxlua{commands.testcase(condition)}
> { If true...}
> {If false}
yes, but testcase is an unfortunate name and sort of obsolete (so best
use doifelse)
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2012-08-20 16:00 test for (negative) number Peter Rolf
2012-08-20 18:11 ` Sietse Brouwer
2012-08-21 6:32 ` Procházka Lukáš
2012-08-21 6:56 ` Wolfgang Schuster
2012-08-21 9:24 ` Peter Rolf
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