Some other resources: perlre, perlretut, perlrecharclass, Regexp Quote-Like Operators, and Pattern Matching, Regular Expressions, and Parsing.
Also see Short, Self Contained, Correct (Compilable), Example and How to ask better questions using Test::More and sample data. For the latter, both for asking questions and for general development, maybe something like:
use warnings;
use strict;
use Test::More 'no_plan';
use Test::NoWarnings;
my @TESTS = (
# dirty # clean
[ q{The 99th bottle's x-o-x labels'} => q{The 99th bottle's labels'}
+ ],
...
);
VECTOR:
for my $ar_vector (@TESTS) {
if (not ref $ar_vector) {
note $ar_vector;
next VECTOR;
}
my ($dirty, $expected) = @$ar_vector;
my $clean = clean_it_up($dirty);
ok $clean eq $expected, qq{'$dirty' -> '$clean'};
} # end for VECTOR
done_testing;
exit;
# subroutine(s) ##############################
sub clean_it_up { ... }
...
See Test::More and friends.
Update: Changed to using q{...} in example code test sentences (was '...') because it's more compatible with embedded single-quotes. (Also a trivial wording change.)
Give a man a fish: <%-{-{-{-<
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