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Convert numbers to various string formats, such as currency

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number lib number decimal.ex
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lib/number/decimal.ex 

defmodule Number.Decimal do

  @moduledoc false



  # Temporary shim that allow Number to work with <2.0 versions of Decimal.

  #

  # In Decimal 1.5, Decimal.compare/2 would return -1, 1, or 0 decimals.

  # In Decimal >=2.0, Decimal.compare/2 returns :lt, :gt, :eq.

  #

  # See https://github.com/danielberkompas/number/issues/47

  @spec compare(Decimal.t(), Decimal.t()) :: :lt | :gt | :eq

  def compare(a, b) do

    result = Decimal.compare(a, b)



    cond do

      result in [:lt, Decimal.new(-1)] ->

        :lt



      result in [:gt, Decimal.new(1)] ->

        :gt



      result in [:eq, Decimal.new(0)] ->

        :eq

    end

  end

end