Re: [NTG-context] Failing \doifemptyelse
Hans, Wolfgang!
Thank you so much for your instructions! — This expansion thing is something I
will probably never master ;-(
Thank you!
Kind regards
Willi
> On 24 Jun 2022, at 05:42, Wolfgang Schuster via ntg-context
> wrote:
>
> Hans Hagen via ntg-context schrieb am 23.06.2022 um 23:00:
>> On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
>>> Good evening gurus!
>>>
>>> Why is the minimal example failing? i.e. executing always the else-branch?
>>>
>>> \setuppapersize[A6][A6]
>>>
>>> \setvariables
>>>[Test]
>>>[Number=]
>>>
>>>
>>> \starttext
>>>Value of variable Number before test: \getvariable{Test}{Number} \crlf
>>>
>>> \doifemptyelse{\getvariable{Test}{Number}}
>>>{\dorecurse
>>> {5}
>>> {TEST}
>>>}
>>>{Nothing defined \par
>>> Contents of variable Number: \getvariable{Test}{Number}
>>>}
>>>
>>> \stoptex
>> there's also
>>
>> \doifelsevariable {Test} {Number}
>>
>> that can be used
>
> in this case
>
> \doifelseemptyvariable{Test}{Number}{...}{...}
>
> is the better choice
>
> Wolfgang
>
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Re: [NTG-context] Failing \doifemptyelse
Hans Hagen via ntg-context schrieb am 23.06.2022 um 23:00:
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the
else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number}
\crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
there's also
\doifelsevariable {Test} {Number}
that can be used
in this case
\doifelseemptyvariable{Test}{Number}{...}{...}
is the better choice
Wolfgang
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Re: [NTG-context] Failing \doifemptyelse
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
there's also
\doifelsevariable {Test} {Number}
that can be used
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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Re: [NTG-context] Failing \doifemptyelse
On 6/23/2022 9:16 PM, Willi Egger via ntg-context wrote:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
because that one doesn't expand the argument
\doifelsenothing
\doifelsesomething
\doifnothing
\doifsomething
can be used for your purpose
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
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Re: [NTG-context] Failing \doifemptyelse
Willi Egger via ntg-context schrieb am 23.06.2022 um 21:16:
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\doifempty(else) doesn't expand the argument and any argument counts as
not empty. To satisfy the command you can expand the first argument
(\normalexpanded) or you use \doifnothing(else) which expands the argument.
\starttext
\startbuffer
\doifemptyelse{}{YES}{NO}
\doifemptyelse{\empty}{YES}{NO}
\normalexpanded{\doifemptyelse{}}{YES}{NO}
\normalexpanded{\doifemptyelse{\empty}}{YES}{NO}
\doifnothingelse{}{YES}{NO}
\doifnothingelse{\empty}{YES}{NO}
\stopbuffer
\typebuffer \getbuffer
\stoptext
Wolfgang
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[NTG-context] Failing \doifemptyelse
Good evening gurus!
Why is the minimal example failing? i.e. executing always the else-branch?
\setuppapersize[A6][A6]
\setvariables
[Test]
[Number=]
\starttext
Value of variable Number before test: \getvariable{Test}{Number} \crlf
\doifemptyelse{\getvariable{Test}{Number}}
{\dorecurse
{5}
{TEST}
}
{Nothing defined \par
Contents of variable Number: \getvariable{Test}{Number}
}
\stoptex
I am using ConTeXt version 2022.05.11 11:36 LMTX fmt: 2022.6.15
Kind regards
Willi
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