# *** before: ***
def greet_old(options = {})
name = options[:name] || "World"
greeting = options[:greeting] || "Hello"
"#{greeting}, #{name}!"
end
puts greet_old(name: "Ann")
# *** in version 2.0: ***
def greet(name: "World", greeting: "Hello")
"#{greeting}, #{name}!"
end
puts greet(name: "Ann")
puts greet(name: "Ann", greeting: "Hi")