defmodule Identicon do
	def main(input) do
		input
		|> hash_input  # pipe operator: input is fed into hash_input
	end

	def hash_input(input) do

		# equal to the below the first two lines
		# hash = :crypto.hash(:md5, input)
		# :binary.bind_to_list(hash)

		:crypto.hash(:md5, input)
		|> :binary.bin_to_list
		
	end
end

• hashing

hash = :crypto.hash(:md5, "banana")
<< 114, 179, 2, ... , 65 >>
Base.encode16(hash)
"72B302BF297A228A75730123EFEF7C41"  # unique sequence of string
:binary.bin_to_list(hash)
[114, 179, 2, ..., 65]  # unique sequence of numbers