| Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock(3pm) | User Contributed Perl Documentation | Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock(3pm) |
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) 2006-2011 Chris Dolan.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
| 2020-05-17 | perl v5.30.0 |