class RPNCalculator::Result::Input
Public Class Methods
new()
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# File lib/rpn-calculator/result/input.rb, line 4 def initialize raise 'Can not instantiate abstract class' end
Public Instance Methods
error()
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# File lib/rpn-calculator/result/input.rb, line 12 def error raise 'must implement in subclass' end
result()
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# File lib/rpn-calculator/result/input.rb, line 16 def result raise 'must implement in subclass' end
valid?()
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# File lib/rpn-calculator/result/input.rb, line 8 def valid? raise 'must implement in subclass' end