From: Aditya Mahajan via ntg-context <ntg-context@ntg.nl>
To: Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>
Cc: Aditya Mahajan <adityam@umich.edu>
Subject: Re: How to let a macro check the previous value of #1 the last time the same macro was called?
Date: Mon, 10 Jan 2022 23:22:06 -0500 (EST) [thread overview]
Message-ID: <nycvar.YAK.7.78.908.2201102320030.1381716@nqv-guvaxcnq> (raw)
In-Reply-To: <7d7f435c-8d62-b07f-25b3-a9d256bc6547@fiee.net>
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On Tue, 11 Jan 2022, Henning Hraban Ramm via ntg-context wrote:
> Am 10.01.22 um 20:21 schrieb Wolfgang Schuster:
> > Henning Hraban Ramm via ntg-context schrieb am 10.01.2022 um 09:52:
> >> Would it make more sense, or would it be “cleaner” to use a variable?
> >
> > You can get rid of the temp variable before the command definition but
> > now you have to access it with a different method in \mymacro, below is
> > one way (LMTX only) but \setvariable and \getvariable work as well.
> >
> > \define[1]\mymacro
> > {\iftok{#1}{\getvalue{previousmymacro}}%
> > same as last time
> > \else
> > it is different from last time
> > \fi
> > \setvalue{previousmymacro}{#1}}
>
> That was the approach that I meant. Thank you.
>
> But would you consider one way to be better?
Just for fun: lua code
\startluacode
local previous = nil
interfaces.implement {
name = "mymacro",
public = true,
arguments = "string",
actions = function (current)
if current == previous then
context("same as last time")
else
context("Different!")
end
previous = current
end,
}
\stopluacode
\starttext
\startlines
cat: \mymacro{cat}
cat: \mymacro{cat}
mouse: \mymacro{mouse}
mouse: \mymacro{mouse}
cat: \mymacro{cat}
\stoplines
\stoptext
Aditya
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next prev parent reply other threads:[~2022-01-11 4:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1050338993.1893942.1641737797345.ref@mail.yahoo.com>
2022-01-09 14:16 ` Joel via ntg-context
2022-01-09 15:03 ` Wolfgang Schuster via ntg-context
2022-01-10 8:52 ` Henning Hraban Ramm via ntg-context
2022-01-10 19:21 ` Wolfgang Schuster via ntg-context
2022-01-10 23:15 ` Henning Hraban Ramm via ntg-context
2022-01-11 4:22 ` Aditya Mahajan via ntg-context [this message]
2022-01-11 8:20 ` Hans Hagen via ntg-context
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