Perl::Critic::Policy::Community::DollarAB - Don't use $a or $b as variable names outside sort

       This policy is part of Perl::Critic::Community.

       Dan Book, "dbook@cpan.org"

       This policy can be configured to allow $a and $b in additional functions, by putting an entry in a
       ".perlcriticrc" file like this:

         [Community::DollarAB]
         extra_pair_functions = pairfoo pairbar

       Copyright 2015, Dan Book.

       This library is free software; you may redistribute it and/or modify it under the terms of the Artistic
       License version 2.0.

       The special variables $a and $b are reserved for sort() and similar functions which assign to them to
       iterate over pairs of values. These are global variables, and declaring them as lexical variables with
       "my" to use them outside this context can break usage of these functions. Use different names for your
       variables.

         my $a = 1;                  # not ok
         my $abc = 1;                # ok
         sort { $a <=> $b } (3,2,1); # ok

       Perl::Critic::Policy::Community::DollarAB - Don't use $a or $b as variable names outside sort

       Perl::Critic

perl v5.40.1                                       2025-03-22              Perl::Critic::...unity::DollarAB(3pm)