[NTG-context] Test for existence of a Ctx buffer by Lua

2011-01-28 Thread Procházka Lukáš Ing . - Pontex s . r . o .

Hello,

how to test by Lua whether a Ctx buffer exists?

---
\startbuffer[A]
  Aaa aaa
\stopbuffer

\starttext
  \getbuffer[A]
  Test
  %\getbuffer[NonExisting]
  Vvv
\stoptext
---

To get something like 'context.buffers.A' - no-nil and 
'context.buffers.NonExisting' - nil?

Best regards,

Lukas


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Pontex s. r. o.  [mailto:pon...@pontex.cz] [http://www.pontex.cz]
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Re: [NTG-context] Test for existence of a Ctx buffer by Lua

2011-01-28 Thread Hans Hagen

On 28-1-2011 3:13, Procházka Lukáš Ing. - Pontex s. r. o. wrote:

Hello,

how to test by Lua whether a Ctx buffer exists?


\doifelsebuffer


---
\startbuffer[A]
Aaa aaa
\stopbuffer

\starttext
\getbuffer[A]
Test
%\getbuffer[NonExisting]
Vvv
\stoptext
---

To get something like 'context.buffers.A' - no-nil and
'context.buffers.NonExisting' - nil?

Best regards,

Lukas





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  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
 | www.pragma-pod.nl
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