I'd turn things outside in a little and have the sub actually sort the list rather than just supply a compare function especially as the sub name implies that sorting is what it is likely to do. Consider:
use strict;
use warnings;
my %sorts = (
'case' => sub {return sort @_},
'ignore' => sub {return sort {uc $a cmp uc $b} @_},
'num' => sub {return sort {$a <=> $b} @_},
'len' => sub {return sort {length $a <=> length $b} @_},
);
my $modeMatch = '(' . join ('|', keys %sorts) . ')';
sub shortSorts {
my ($type, @list) = @_;
my ($mode) = lc ($type) =~ $modeMatch;
@list = map {scalar reverse $_} @list if $type =~ /\brev\b/i;
@list = $sorts{$mode}->(@list);
@list = map {scalar reverse $_} @list if $type =~ /\brev\b/i;
@list = reverse @list if $type =~ /\bdesc\b/i;
return @list;
}
my @unsorted_array = qw(Red yellow Green cyan Blue magenta);
for my $sortType ('case rev desc', 'case desc', 'ignore') {
print "$sortType:\n ", join (', ', shortSorts($sortType, @unsort
+ed_array)), "\n";
}
Prints:
case rev desc:
yellow, Green, cyan, Blue, Red, magenta
case desc:
yellow, magenta, cyan, Red, Green, Blue
ignore:
Blue, cyan, Green, magenta, Red, yellow
True laziness is hard work
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