Perl::Critic::Policy::Community::LoopOnHash - Don't loop over hashes

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

       Dan Book, "dbook@cpan.org"

       This policy is not configurable except for the standard options.

       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.

       It's possible to loop over a hash as if it was a list, which results in alternating between the keys and
       values of the hash. Often, the intent was instead to loop over either the keys or the values of the hash.

        foreach my $foo (%hash) { ... }      # not ok
        action() for %hash;                  # not ok
        foreach my $foo (keys %hash) { ... } # ok
        action() for values %hash;           # ok

       If you intended to loop over alternating keys and values, you can make this intent clear by first copying
       them to an array:

        foreach my $key_or_value (@{[%hash]}) { ... }
        foreach my $key_or_value (my @dummy = %hash) { ... }

       This policy is a subclass of the policy Perl::Critic::Policy::Variables::ProhibitLoopOnHash, and performs
       the same function but in the "community" theme.

       Perl::Critic::Policy::Community::LoopOnHash - Don't loop over hashes

       Perl::Critic

perl v5.40.1                                       2025-03-22              Perl::Critic::...ity::LoopOnHash(3pm)