defmodule Talk do  
  def introduction(opts \\ [name: "Sarah", birthday: "1985-12-30"]) do
    IO.puts "Hi my name is #{opts[:name]} and I was born on #{opts[:birthday]}"
  end
end
# Drops the birthday
Talk.introduction(name: "Joe") # => Hi my name is Joe and I was born on
# Drops the name
Talk.introduction(birthday: "1985-12-30") # => Hi my name is  and I was born on 1985-12-30

defmodule Talk do
  use NamedArgs
  def introduction(opts \\ [name: "Sarah", birthday: "1985-12-30"]) do
    IO.puts "Hi my name is #{opts[:name]} and I was born on #{opts[:birthday]}"
  end
end
# No params!
Talk.introduction # => Hi my name is Sarah and my birthday is 1985-12-30
# Keeps the birthday
Talk.introduction(name: "Joe") # => Hi my name is Joe and I was born on 1985-12-30
# Keeps the name
Talk.introduction(birthday: "1986-01-01") # => Hi my name is Sarah and I was born on 1986-01-01
# Order does not matter!
Talk.introduction(birthday: "1986-01-01", name: "Joe") # => Hi my name is Joe and I was born on 1986-01-01

  def deps do
    [
      {:named_args, "~> 0.1.0"}
    ]
  end