Two ways of dealing with modules

module_examples.ex

# Option 1
# Imagine that the implementations of these three functions span ~100 LOC each, including
# private functions
defmodule Users do
  def create(params) do
    # this and all private functions for this are like 100 LOC
  end

  def update(user, params) do
    # this and all private functions for this are like 100 LOC
  end

  def get_posts_for(user) do
    # this and all private functions for this are like 100 LOC
  end
end

# Option 2
# Instead of 1 300 LOC module, we now have 3 100 LOC modules, and we just delegate to
# the smaller modules in our original module.
defmodule Users do
  defdelegate create(params), to: Users.Create
  defdelegate update(user, params), to: Users.Update
  defdelegate get_posts_for(user), to: Users.GetPostsFor
end