[texhax] First character of a string

[P.Taylor]

Simplistically, something like the following

     \def \firstofmany #1#2\sentinel {#1}
     \def \firstchar #1{\firstofmany #1\sentinel}

Of course, there are many caveats : TeX deals in
tokens, not characters; #1 must not contain \sentinel,
#1 must not be empty, and so on ...

Philip Taylor
--------
Alex Torkhov wrote:

 > Hi all!
 >
 > How can I make function in TeX that returns first character of its param?
 >
 > Thanks,
 > Alex.
 >
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