Method: Bmg::Operator::Project#each

Defined in:
lib/bmg/operator/project.rb

#each ⇒ Object 



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# File 'lib/bmg/operator/project.rb', line 31

def each
  return to_enum unless block_given?
  seen = {}
  @operand.each do |tuple|
    projected = tuple_project(tuple)
    unless seen.has_key?(projected)
      yield(projected)
      seen[projected] = true
    end
  end
end