Elixir's :binary.bin_to_list atom is not working properly

Asked Apr 07 '20 at 18:12

Active Apr 07 '20 at 18:12

Viewed 25 times

I am trying to create a simple app for creating Identicons.

Hash.input should return first 3 values from a list, but it breaks when I try to hash 'hello'. What is going on and how can I fix it?

defmodule Hash do
    def input(input) do
        hex = :crypto.hash(:md5, input) |> IO.inspect |> :binary.bin_to_list
        [first, second, third | _tail] = hex
        [first, second, third]
    end
end

Code output:

iex(1)> Hash.input('hello')
<<93, 65, 64, 42, 188, 75, 42, 118, 185, 113, 157, 145, 16, 23, 197, 146>>
']A@'

iex(2)> Hash.input('good day') 
<<202, 151, 104, 189, 8, 195, 115, 102, 95, 188, 200, 128, 33, 240, 136, 182>>
[202, 151, 104]

asked Apr 07 '20 at 18:12

reebyt

What does mean “it breaks”? It works exactly as intended, the same as `:binary.bin_to_list/1`. What have you wanted to get back? – Aleksei Matiushkin Apr 07 '20 at 18:18
1

_Sidenote:_ `def input(input), do: :crypto.hash(:md5, input) |> :binary.bin_to_list() |> Enum.take(3)`. – Aleksei Matiushkin Apr 07 '20 at 18:27

Elixir's :binary.bin_to_list atom is not working properly

0 Answers0