Programming Elixir binary chop exercise

gistfile1.ex

defmodule Chop do

    def guess(actual, a..b) do
        mid = midpoint(a, b)
        IO.puts "Is it #{mid}?"
        compare actual, a..b, mid
    end

    defp compare(actual, _.._, current) when current == actual do
        IO.puts "Got it! It was #{actual}"
    end

    defp compare(actual, a.._, current) when actual < current do
        guess actual, a..current
    end

    defp compare(actual, _..b, current) when actual >= current do
        guess actual, current..b
    end

    defp midpoint(a, b) do
        a + div(b - a, 2)
    end

end

#iex(1)> Chop.guess(273, 1..1000)
#Is it 500?
#Is it 250?
#Is it 375?
#Is it 312?
#Is it 281?
#Is it 265?
#Is it 273?
#Got it! It was 273

you don't need the guard on your first compare, you can just do compare(actual, _.._, actual)