You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: op_sub.rb
    path of file: ./repos/facets/lib/core/facets/hash
    
    the code of the file until where you have to start completion: class Hash

  # Operator for removing hash pairs. If another hash is given
  # the pairs are only removed if both key and value are equa
    
  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