alpha — eliminate non-alpha characters
For more information on Perl Regular Expressions, pattern matching and character classes, see perlre(1).
Interchange 5.9.0:
Source: code/Filter/alpha.filter
Lines: 20
# Copyright 2002-2007 Interchange Development Group and others # Copyright 1996-2002 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. See the LICENSE file for details. # # $Id: alpha.filter,v 1.7 2007-08-20 21:11:09 jon Exp $ CodeDef alpha Filter CodeDef alpha Description A-Za-z only CodeDef alpha Help Returns only ASCII alphabetic characters (A-Z and a-z) CodeDef alpha Routine <<EOR sub { my $val = shift; $val =~ s/[^A-Za-z]+//g; return $val; } EOR