Correcting case in a name

user.rb

class User

  attr_accessor :first_name, :last_name

  def name
    out = [first_name, last_name].join(' ').strip
    out =~ /\A([a-z\s'\-]*|[A-Z\s'\-]*)\Z/ ? out.titleize : out
  end

end

# Too lazy to use the SHIFT key? Don't worry, we'll do that for you.
"alice" + "marigold" => "Alice Marigold"

# Angry? We'll tone that down.
"ALICE" + "MARIGOLD" => "Alice Marigold"

# Already know how to capitalize your name? That's fine, we'll leave it alone.
"Alice" + "du Marigold" => "Alice du Marigold"

# Another example where we'll leave your name alone.
"Alice" + "O'Conner" => "Alice O'Conner"

# This one fails a little, but not too bad.
"alice " + "o'conner" => "Alice O'conner"