Tasks from Programming Elixir book

1. Exercise: ListsAndRecursion-5 (enum_funtions.ex) Implement the following Enum functions using no library functions or list comprehensions: all?, each, filter, split, and take. You may need to use an if statement to implement filter. The syntax for this is if condition do expression(s) else
   expression(s) end

2. Exercise: ListsAndRecursion-6 (flatten_list.ex) Write a flatten(list) function that takes a list that may contain any number of sublists, which themselves may contain sublists, to any depth. It returns the elements of these lists as a flat list.

If available in Hex, the package can be installed as:

1. Add elixir_tasks to your list of dependencies in mix.exs:

   def deps do [{:elixir_tasks, "~> 0.0.1"}] end

2. Ensure elixir_tasks is started before your application:

   def application do [applications: [:elixir_tasks]] end