defmodule HW do
  @moduledoc """
  A very minor module to support hello world
  Ironically complex as there are 4 versions of hello world here
  """

  @doc """
  a basic function to print hello world ...
  """
  def hw do
    IO.puts "Hello World 2"
  end

  @doc """
  As with the previous function, but using a special syntax to go on a single line
  """
  def hw2, do: IO.puts("hello World 2b")

  @doc """
  Prints command line arguements using the each function
  """
  def hw_args do
    Enum.each(System.argv, fn(ele) -> IO.puts("Hello World args #{ele}") end)
  end

  @doc """
  As with the previous function, but using a special syntax to write one line anonymous functions
  """
  def hw_args2 do
    Enum.each(System.argv, &(IO.puts("Hello World2 args #{&1}") ))
  end

end


HW.hw_args2