Ruby Language Methods Optional parameter(s) (splat operator)
Example
def welcome_guests(*guests)
guests.each { |guest| puts "Welcome #{guest}!" }
end
welcome_guests('Tom') # Welcome Tom!
welcome_guests('Rob', 'Sally', 'Lucas') # Welcome Rob!
# Welcome Sally!
# Welcome Lucas!
Note that welcome_guests(['Rob', 'Sally', 'Lucas']) will output Welcome ["Rob", "Sally", "Lucas"]!
Instead, if you have a list, you can do welcome_guests(*['Rob', 'Sally', 'Lucas']) and that will work as welcome_guests('Rob', 'Sally', 'Lucas').
