How to return multiple values from a method
The following is easy stuff but we tend to forget about it… probably because most of us are not used to this kind of behavior from a programming language.
Ruby gives the illusion that you can return more than one element from a method.
This is how you do it :
def a_method_to_insult_innocent_people error = compute_error if error == :stupid return false, "You made a stupid error" elsif error == :ridiculous return false, "You made a ridiculous error" elsif error == :worst_of_all_time return false, "You made the most idiot error in history. Way to go..." else return true, "You made no error, you are still an idiot" end end success, msg = a_method_to_insult_innocent_people do_something_with_success(success) destroy_hateful_words!(msg)
It’s important to note that even though it doesn’t look like it, only ONE thing is returned from this method. This thing is, you bet, an array.
return false, "you made a stupid error"
is equivalent to :
return [false, "you made a stupid error"]
Ruby arranges things both on the sending and receiving end to make it look like you are returning more than one element.