Method: Hash#-

Defined in:
lib/core/facets/hash/op_sub.rb

#-(other) ⇒ Object

Operator for removing hash pairs. 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.

CREDIT: Trans CREDIT: Xavier Shay (bug fix)



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# File 'lib/core/facets/hash/op_sub.rb', line 10

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