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alco/bin_to_hex.ex

Last active August 29, 2015 14:00
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bin_to_hex.ex
defmodule B do
def bin_to_hex(data) do
for <<hi::4, lo::4 <- data>>,
into: <<>>,
do: <<hex_digit(hi), hex_digit(lo)>>
end
defp hex_digit(n) when n < 10, do: n + ?0
defp hex_digit(n), do: n-10 + ?a
end
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