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README  view on Meta::CPAN

     %hash = (a=>1, b=>2);
     %reverse = reverse %hash; # => (2=>"b", 1=>"a")

    Since the new keys can contain duplicates, this can "destroy" some old
    keys:

     %hash = (a=>1, b=>1);
     %reverse = reverse %hash; # => sometimes (1=>"b"), sometimes (1=>"a")

    Hash::MoreUtil's "safe_reverse" allows you to specify a coderef that can
    decide whether to ignore overwriting, croak, or whatever else.

  Slicing (creating subset)
    Hash::MoreUtils's "slice_*" functions.

    Hash::Subset

    Hash::Util::Pick

  Tying
    The tie mechanism, although relatively slow, allows you to create

lib/Acme/CPANModules/HashUtilities.pm  view on Meta::CPAN

    %hash = (a=>1, b=>2);
    %reverse = reverse %hash; # => (2=>"b", 1=>"a")

Since the new keys can contain duplicates, this can "destroy" some old keys:

    %hash = (a=>1, b=>1);
    %reverse = reverse %hash; # => sometimes (1=>"b"), sometimes (1=>"a")

<pm:Hash::MoreUtil>'s `safe_reverse` allows you to specify a coderef that can
decide whether to ignore overwriting, croak, or whatever else.


## Slicing (creating subset)

<pm:Hash::MoreUtils>'s `slice_*` functions.

<pm:Hash::Subset>

<pm:Hash::Util::Pick>

lib/Acme/CPANModules/HashUtilities.pm  view on Meta::CPAN

 %hash = (a=>1, b=>2);
 %reverse = reverse %hash; # => (2=>"b", 1=>"a")

Since the new keys can contain duplicates, this can "destroy" some old keys:

 %hash = (a=>1, b=>1);
 %reverse = reverse %hash; # => sometimes (1=>"b"), sometimes (1=>"a")

L<Hash::MoreUtil>'s C<safe_reverse> allows you to specify a coderef that can
decide whether to ignore overwriting, croak, or whatever else.

=head2 Slicing (creating subset)

L<Hash::MoreUtils>'s C<slice_*> functions.

L<Hash::Subset>

L<Hash::Util::Pick>

=head2 Tying