Method: Hash#-

Defined in:
lib/ext/hash.rb

#-(other) ⇒ Object

Extracted from Ruby Facets: Operator for remove hash paris. If another hash is given the pairs are only removed if both key and value are equal. If an array is given then matching keys are removed.


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# File 'lib/ext/hash.rb', line 12

def -(other)
  h = self.dup
  if other.respond_to?(:to_ary)
    other.to_ary.each do |k|
      h.delete(k)
    end
  else
    other.each do |k,v|
      if h.key?(k)
        h.delete(k) if v == h[k]
      end
    end
  end
  h
end