# File lib/facets/core/enumerable/each_unique_pair.rb, line 33
  def each_unique_pair(&yld)
    self.each_combination(2,&yld)
    #s = self.to_a
    #self.each_with_index{ |a,i|
    #  self[(i+1)..-1].each{ |b| yield a,b }
    #}
  end