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Revision b022eb54e6544499c9f689a3b4343380d28c8852 authored by cvs2svn on 22 March 1995, 12:27:16 UTC, committed by cvs2svn on 22 March 1995, 12:27:16 UTC
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Tip revision: b022eb54e6544499c9f689a3b4343380d28c8852 authored by cvs2svn on 22 March 1995, 12:27:16 UTC
This commit was manufactured by cvs2svn to create tag 'r12beta4'.
This commit was manufactured by cvs2svn to create tag 'r12beta4'.
Tip revision: b022eb5
libregsub.tex
\section{Standard Module \sectcode{regsub}}
\stmodindex{regsub}
This module defines a number of functions useful for working with
regular expressions (see built-in module \code{regex}).
\renewcommand{\indexsubitem}{(in module regsub)}
\begin{funcdesc}{sub}{pat\, repl\, str}
Replace the first occurrence of pattern \var{pat} in string
\var{str} by replacement \var{repl}. If the pattern isn't found,
the string is returned unchanged. The pattern may be a string or an
already compiled pattern. The replacement may contain references
\samp{\e \var{digit}} to subpatterns and escaped backslashes.
\end{funcdesc}
\begin{funcdesc}{gsub}{pat\, repl\, str}
Replace all (non-overlapping) occurrences of pattern \var{pat} in
string \var{str} by replacement \var{repl}. The same rules as for
\code{sub()} apply. Empty matches for the pattern are replaced only
when not adjacent to a previous match, so e.g.
\code{gsub('', '-', 'abc')} returns \code{'-a-b-c-'}.
\end{funcdesc}
\begin{funcdesc}{split}{str\, pat}
Split the string \var{str} in fields separated by delimiters matching
the pattern \var{pat}, and return a list containing the fields. Only
non-empty matches for the pattern are considered, so e.g.
\code{split('a:b', ':*')} returns \code{['a', 'b']} and
\code{split('abc', '')} returns \code{['abc']}.
\end{funcdesc}
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