Hash::Util(3p) Perl Programmers Reference Guide Hash::Util(3p)

Hash::Util(3p) Perl Programmers Reference Guide Hash::Util(3p) # Hash::Util(3p) Perl Programmers Reference Guide Hash::Util(3p) NNAAMMEE # Hash::Util - A selection of general-utility hash subroutines SSYYNNOOPPSSIISS # # Restricted hashes use Hash::Util qw( fieldhash fieldhashes all_keys lock_keys unlock_keys lock_value unlock_value lock_hash unlock_hash lock_keys_plus hash_locked hash_unlocked hashref_locked hashref_unlocked hidden_keys legal_keys lock_ref_keys unlock_ref_keys lock_ref_value unlock_ref_value lock_hashref unlock_hashref lock_ref_keys_plus hidden_ref_keys legal_ref_keys hash_seed hash_value hv_store bucket_stats bucket_info bucket_array lock_hash_recurse unlock_hash_recurse lock_hashref_recurse unlock_hashref_recurse hash_traversal_mask ); %hash = (foo => 42, bar => 23); # Ways to restrict a hash lock_keys(%hash); lock_keys(%hash, @keyset); lock_keys_plus(%hash, @additional_keys); # Ways to inspect the properties of a restricted hash my @legal = legal_keys(%hash); my @hidden = hidden_keys(%hash); my $ref = all_keys(%hash,@keys,@hidden); my $is_locked = hash_locked(%hash); # Remove restrictions on the hash unlock_keys(%hash); # Lock individual values in a hash lock_value (%hash, 'foo'); unlock_value(%hash, 'foo'); # Ways to change the restrictions on both keys and values lock_hash (%hash); unlock_hash(%hash); my $hashes_are_randomised = hash_seed() ! ...