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2.0.1
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A collection of helpers to operate on nested maps. See README for the complete list of helpers. The test suite is also helpful.

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digger lib impl snake_caser string.ex
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lib/impl/snake_caser/string.ex 

defimpl Digger.SnakeCaser, for: BitString do

  def snake_case(string) do

    string

    |> String.replace(~r/([A-Z\d]+)([A-Z][a-z])/, "\\1_\\2")

    |> String.replace(~r/([a-z\d])([A-Z])/, "\\1_\\2")

    |> String.replace(~r/-/, "_")

    |> String.downcase

  end

end