elixir-for-n00bs

Simple project to study and practice Elixir

Nice things about functional programming

No mutable data (no side effect)
No state (no implicit, hidden state. Functional programming do not eliminate state, it just make it visible and explicit (at least when programmers want it to be).
Referential transparency: Expressions can be replaced by its values. Example = 5*5 can be replaced by 25

This project is organized in elixir source files and each example have comments.

elixir types.exs

Mix creates a new Elixir project

cd hello_world
mix test

REPL interaction

iex -S mix
iex(1)> HelloWorld.hello()

Nice tool to create one inicial project, could help to organize projects and already create one test file :)

Turn error cases more explicit

def div(a, 0) do
    :no_dice
end

Simplify parameters validation and leaves more explicit

def div(a, 0) do
    :no_dice
  end
  def div(a, b) do
    a / b
  end

Simplify chained operations

val = 
      "leo"
      |> reverse
      |> capitalize
      |> reverse