From: Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>,
Martin Althoff <martin.althoff@yahoo.com>
Subject: Re: passing variables/data between context and lua
Date: Fri, 27 Sep 2019 14:58:26 +0200 [thread overview]
Message-ID: <4c95d00f-b9fc-1595-eb62-ebe75e55439f@gmail.com> (raw)
In-Reply-To: <46302c5715d57820fa2186c912cbd198ca0e1910.camel@yahoo.com>
Martin Althoff schrieb am 27.09.2019 um 06:59:
> Hi, I am trying to pass variables/data between context and lua. Lua would be used for
> calculations on data coming from context.
>
> Unfortunately I can't figure out what to do. The code below doesn't work, but is there to
> illustrate my idea.
>
> Any help would be much appreciated. Thanks, Martin
>
>
> \define\question{44}
\defineexpandable\question{44}
> \starttext
>
> \startluacode
> local points = \question * 92
> -- do some calculations with points and return to to context
> answer=42
> \stopluacode
>
> % lots of Text in between
> The answer is \answer
>
> \stoptext
A solution which uses only existing commands in the document.
\startsetups [martin]
\startlua
local points = tonumber(\getvariable{martin}{question}) or 0 ;
points = points * 92 ;
local answer = 42 ;
context.setvariable("martin","points",points) ;
context.setvariable("martin","answer",answer) ;
\stoplua
\stopsetups
\setvariable{martin}{set}{\directsetup{martin}}
\starttext
\setvariables [martin] [question=44]
Points: \getvariable{martin}{points}
The answer is \getvariable{martin}{answer}.
\stoptext
Wolfgang
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next prev parent reply other threads:[~2019-09-27 12:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 4:59 Martin Althoff
2019-09-27 8:41 ` mf
2019-09-27 12:58 ` Wolfgang Schuster [this message]
2019-09-28 6:53 ` defs, variables and dimensions (was: passing variables/data between context and lua) Henning Hraban Ramm
2019-09-28 17:51 ` defs, variables and dimensions Wolfgang Schuster
2019-09-30 2:51 ` defs, variables and dimensions (was: passing variables/data between context and lua) Martin Althoff
2019-09-29 11:51 ` passing variables/data between context and lua Martin Althoff
2019-10-06 5:11 ` Rudolf Bahr
2019-10-06 20:44 ` Wolfgang Schuster
2019-10-08 7:21 ` Rudolf Bahr
2019-10-08 12:55 ` Aditya Mahajan
2019-10-08 16:22 ` Rudolf Bahr
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