[texhax] How to test for existence of a macro?

D. R. Evans doc.evans at gmail.com
Mon Aug 31 17:03:56 CEST 2009

D. R. Evans said the following at 08/28/2009 06:14 PM :
> I couldn't find this in the TeXbook, but perhaps I was just looking in the
> wrong place.
> How should I test cleanly for the existence of a particular macro?

Several really useful answers. Now to experiment and choose amongst them.

Thanks so much for the replies.


Web:  http://www.sff.net/people/N7DR

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