[no subject]

Maybe I can get it right on the second try:

     /([^%].|\S)$signal/

This also has the minor benefit of eliminating the special case when 
the signal offset from the beginning of the string is 1.

S

> where $signal is "XMI001", the caret is a negation rather than an
> anchor, and the "\S" (uppercase "S") matches a character that is not
> whitespace. (NB: if $signal contains regex metacharacters, it will
> probably need to be enclosed in parentheses.)
>
> This misses the signal when it occurs at offset 0 or 1 from the
> beginning of the string. A potentially easy fix for this (which may not
> be an option in your environment) is to prepend two spaces to the
> beginning of every string processed. That guarantees that there will be
> enough leading characters for the above regex to match the signal
> wherever it occurs in the string.


-- 
Stephen Cristol
cristol at emory.edu



</pre>
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