Elixir Pattern matching

matching.exs

defmodule Patterns do
  def greet(%{name: name, age: age}) do
    IO.puts "Hi there #{name}, what's up at #{age}?"
  end
  def greet(%{name: "José Valim"}) do
    IO.puts "Hi José, thanks for elixir! <3"
  end
  def greet(%{name: name}) do
    IO.puts "Hi there #{name}"
  end
  def greet(_) do
    IO.puts "Hi"
  end
end

Patterns.greet %{name: "Tobi", age: 27} # Hi there Tobi, what's up at 27?
Patterns.greet %{name: "José Valim"} # Hi José, thanks for elixir! <3
Patterns.greet %{name: "dear Reader"} # Hi there dear Reader
Patterns.greet ["Mop"] # Hi