YAML::DBM#invert

ydbm.invert → hash

# File tmp/rubies/ruby-3.4.1/lib/yaml/dbm.rb, line 194
def invert
    h = {}
    keys.each { |k| h[ self.fetch( k ) ] = k }
    h
end

Returns a Hash (not a DBM database) created by using each value in the database as a key, with the corresponding key as its value.

Note that all values in the hash will be Strings, but the keys will be actual objects.

See also #index #key #has_value? #reject also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0