raise ArgumentError : raise « Statement « Ruby






  1. Ruby
  2. Statement
  3. raise

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!








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