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Categories / Ruby / Statement

 

Raise ArgumentError

def join_to_successor(s)   raise ArgumentError, 'No successor method!' unless s.respond_to? :succ   return "#{s}#{s.succ}" end join_to_successor('a')                # => "ab" join_to_successor(4)                  # => "45" join_to_successor(4.01) # ArgumentError: No successor method!