elixir_pattern_matching.exs

defmodule Greeting do
  def say(%{hello: name}) do
    IO.puts "Hello #{name}"
  end

  def say(%{ola: name}) do
    IO.puts "Olá #{name}"
  end
end

Greeting.say(%{hello: "john"})
Greeting.say(%{ola: "joao"})

# ❯ elixir greeting.exs
# Hello john
# Olá joao