Contents

class Hash
  # Returns true or false whether the hash contains
  # _only_ the given keys.
  #
  #   require 'facet/hash/has_only_keys?'
  #
  #   h = { :a => 1, :b => 2 }
  #   h.has_only_keys?( :a, :b )   #=> true
  #   h.has_only_keys?( :a )       #=> false
  #  
  def has_only_keys?(*check_keys)
    unknown_keys = self.keys - check_keys
    return !unknown_keys.empty?
  end
end

  

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
facets-0.7.0	lib/facet/hash/has_only_keys%3F.rb
facets-0.7.1	lib/facet/hash/has_only_keys%3F.rb
facets-0.7.2	lib/facet/hash/has_only_keys%3F.rb