Elixir: how to use flush() function in script?

1
votes

Documentation gives example of usage in iex - and it works there: http://elixir-lang.org/getting-started/processes.html#send-and-receive

Though it doesn't work inside of script:

$ elixir e.exs
** (CompileError) e.exs:6: undefined function flush/0
    (elixir) lib/code.ex:363: Code.require_file/2

I found that this function is part of some IEx.Helpers https://hexdocs.pm/iex/master/IEx.Helpers.html

But prepending use IEx.Helpers or use IEx at the beginning of script doesn't give effect.

1
elixir
If I'm understanding your question correctly, uou could also simply run $ iex e.exs - Onorio Catenacci

1 Answers

2
votes

You do not want to use the use keyword. You are going to either want alias or import.

They are all related, but slightly different.

  • import Foo.Bar - will import all of the functions defined in the Foo.Bar module allowing you to call function()
  • alias Foo.Bar - will also import all of the functions defined in the module Foo.Bar. The difference is that now you need to use Bar.function() instead of just function().
  • use Foo.Bar - will call a macro inside of the Foo.Bar module called __using__/1.

You can read more about the difference of these words and more here.