NAME

       Perl::Critic::Policy::Variables::ProhibitLoopOnHash - Don't write loops on hashes, only on
       keys and values of hashes

VERSION

       version 0.008

DESCRIPTION

       When "looping over hashes," we mean looping over hash keys or hash values. If you forgot
       to call "keys" or "values" you will accidentally loop over both.

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

       An effort is made to detect expressions:

           action() for %hash ? keys %hash : ();                             # ok
           action() for %{ $hash{'stuff'} } ? keys %{ $hash{'stuff'} } : (); # ok

       (Granted, the second example there doesn't make much sense, but I have found a variation
       of it in real code.)

CONFIGURATION

       This policy is not configurable except for the standard options.

AUTHOR

       Sawyer X, "xsawyerx@cpan.org"

THANKS

       Thank you to Ruud H.G. Van Tol.

SEE ALSO

       Perl::Critic

AUTHOR

       Sawyer X

COPYRIGHT AND LICENSE

       This software is copyright (c) 2018 by Sawyer X.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.

perl v5.28.1                             Perl::Critic::Policy::Variables::ProhibitLoopOnHash(3pm)