Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock3pm
Forbid $b before $a in sort blocks.
Affiliation
This Policy is part of the core Perl::Critic distribution.
Overview
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 okmy @foo = reverse sort @bar; #okmy @foo = sort { $b <=> $a } @bar; #not okmy @foo = reverse sort { $a <=> $b } @bar; #ok
Configuration
This Policy is not configurable except for the standard options.
Releases
10 releases since Debian 5.0 (Lenny); the text changed 9 times.