Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock - Forbid $b before $a in sort blocks.
This Policy is part of the core Perl::Critic distribution.
Conway says that it is much clearer to use reverse than to flip $a and
$b around in a sort block. He also suggests that, in newer perls,
reverse is specifically looked for and optimized, and in the case of a
simple reversed string sort, using reverse with a sort with no block
is faster even in old perls.
my @foo = sort { $b cmp $a } @bar; #not ok
my @foo = reverse sort @bar; #ok
my @foo = sort { $b <=> $a } @bar; #not ok
my @foo = reverse sort { $a <=> $b } @bar; #ok
This Policy is not configurable except for the standard options.
Chris Dolan <cdolan@cpan.org>
Copyright (C) 2006 Chris Dolan. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.