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Functional programming abstractions for Elixir (Beta release: APIs may change before 1.0)

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funx lib range.ex
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lib/range.ex 

defimpl Funx.Foldable, for: Range do

  @spec fold_l(Range.t(), acc, (elem, acc -> acc)) :: acc when acc: term(), elem: term()

  def fold_l(range, acc, func), do: Enum.reduce(range, acc, func)



  @spec fold_r(Range.t(), acc, (elem, acc -> acc)) :: acc when acc: term(), elem: term()

  def fold_r(range, acc, func), do: Enum.reduce(Enum.reverse(range), acc, func)

end