From: "Dan Stevens (IAmAI)" <dan.stevens.iamai@...>
Date: 2007-04-03T05:50:39+09:00
Subject: Newbie problem: ArgumentError when creating subclass

Could someone explain why the following code raises ArgumentError. Thanks.

class SuperClass
	
	def initialize #Make sure you spell 'initialize' correctly!
		@my_attr = 1
	end
	
	attr_reader :my_attr
end

class SubClass < SuperClass

	def initialize(data1, data2)
		super
		@data1 = data1
		@data2 = data2
	end
	
	attr_reader :data1
	attr_reader :data2
	
end

test = SubClass.new("one", "two")
puts test.my_attr
puts test.data1
puts test.data2

$ ruby inheritance_problem.rb
inheritance_problem.rb:13:in `initialize': wrong number of arguments
(2 for 0) (ArgumentError)
        from inheritance_problem.rb:13:in `initialize'
        from inheritance_problem.rb:23:in `new'
        from inheritance_problem.rb:23