ntg-context - mailing list for ConTeXt users
 help / color / mirror / Atom feed
From: Nicola <nvitacolonna@gmail.com>
To: ntg-context@ntg.nl
Subject: Re: How to avoid overriding a control sequence?
Date: Mon, 7 Mar 2016 20:02:19 +0100	[thread overview]
Message-ID: <nbkj7r$doq$1@ger.gmane.org> (raw)
In-Reply-To: <CAG5iGsCAtLgy75RvjbMBfS=+=Vo9OzK9iioAK=Z5QreDk3aV1g@mail.gmail.com>

On 2016-03-07 18:47:20 +0000, luigi scarso said:

> On Mon, Mar 7, 2016 at 7:40 PM, Nicola <nvitacolonna@gmail.com> wrote:
> How do I check in ConTeXt whether a control sequence is already
> defined (to avoid redefining it by accident)?
> 
> 
> kind of 
> 
> \ifdefined\writebanner \else \unexpanded\def\writebanner{\writestring}     \fi
> ?

That works, thanks!

Nicola


___________________________________________________________________________________
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
___________________________________________________________________________________

  reply	other threads:[~2016-03-07 19:02 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-07 18:40 Nicola
2016-03-07 18:47 ` luigi scarso
2016-03-07 19:02   ` Nicola [this message]
2016-03-07 20:16 ` Hans Hagen
2016-03-07 20:30   ` Nicola

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='nbkj7r$doq$1@ger.gmane.org' \
    --to=nvitacolonna@gmail.com \
    --cc=ntg-context@ntg.nl \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).