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SLOYD / Alt-Data-Frame-ButMore-0.0042_02 / lib / Data / Frame / Autobox / Hash.pm 

            

              
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package Data::Frame::Autobox::Hash;
# ABSTRACT: Additional Hash role for Moose::Autobox
use Moose::Role;
use List::AllUtils qw(pairmap);
use Ref::Util;
use namespace::autoclean;
sub isempty { keys %{ $_[0] } == 0 }
sub names { [ keys %{ $_[0] } ] }
sub set {
    my ( $hash, $key, $value ) = @_;
    $hash->{$key} = $value;
}
sub rename {
    my ( $hash, $href_or_coderef ) = @_;
    my %new_hash;
    if ( Ref::Util::is_coderef($href_or_coderef) ) {
        %new_hash = pairmap { ( $href_or_coderef->($a) // $a ) => $b } %$hash;
    }
    else {
        %new_hash = pairmap { ( $href_or_coderef->{$a} // $a ) => $b } %$hash;
    }
    return \%new_hash;
}
sub copy { { %{ $_[0] } } }
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Data::Frame::Autobox::Hash - Additional Hash role for Moose::Autobox
=head1 VERSION
version 0.0042_02
=head1 SYNOPSIS
    use Moose::Autobox;
    Moose::Autobox->mixin_additional_role(
        HASH => "Data::Frame::Autobox::Hash"
    );
    { one => 1 }->names;            # [ 'one' ]
    { one => 1 }->isempty;          # false
=head1 DESCRIPTION
This is an additional Hash role for Moose::Autobox.
=head1 METHODS
=head2 isempty
    my $isempty = $hash->isempty;
Returns a boolean value for if the hash ref is empty.
=head2 names
    my $keys = $hash->names;
This is same as the C<keys> method of Moose::Autobox::Hash.
=head2 set($key, $value)
    $hash->set($key, $value);
This is same as the C<put> method of Moose::Autobox::Hash.
=head2 rename($hashref_or_coderef)
    my $new_href1 = $href->rename( { $from_key => $to_key, ... } );
    my $new_href2 = $href->rename( sub { $_[0] . 'foo' } );
It can take either a hashref of key mappings. If a keys does not exist in
the mappings, it would not be renamed. 
Also this method can take a coderef which transforms the keys.
=head2 copy
Shallow copy.
=head1 SEE ALSO
L<Moose::Autobox>
L<Moose::Autobox::Hash>
=head1 AUTHORS
=over 4
=item *
Zakariyya Mughal <zmughal@cpan.org>
=item *
Stephan Loyd <sloyd@cpan.org>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014, 2019 by Zakariyya Mughal, Stephan Loyd.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut