[texhax] (no subject)
Zalman Rubinstein
zalman at math.haifa.ac.il
Sun Jul 9 10:08:57 CEST 2006
Dear Sirs,
I am a TUG member and have a technical question in Plain TeX programming.
I am a Plain TeX user ans while writing a macro for mathematical thesis typing I have encountered the following problem:
I have a string of tokens:
\t={ab...xy.....cd....xy....ef....xy....}
that is the string \t contains tokens and accasionally the pair "xy" appears side by side.
I need to modify the string \t as to erase from each couple "xy" either the token "x" or the token "y". The rest should remain unchanged.
That is I nead to store in a token register, say \tt the token
\tt={ab...y...cd...y...ef...y...} or \tt={ab...x...cd...x...ef...x...}.
I would appreciate any help you can provide and/or referal to somebody who can help with the plain TeX problem.
Thank you,
Zalman Rubinstein, University of Haifa
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