Class: RPNCalculator::Result::Operation

Inherits:
Object
  • Object
show all
Defined in:
lib/rpn-calculator/result/operation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(operation, result, invalid_operation_elements = []) ⇒ Operation

Returns a new instance of Operation.



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# File 'lib/rpn-calculator/result/operation.rb', line 4

def initialize(operation, result, invalid_operation_elements = [])
  @operation                  = operation
  @result                     = result
  @invalid_operation_elements = invalid_operation_elements
end

Instance Attribute Details

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/rpn-calculator/result/operation.rb', line 18

def result
  @result
end

Instance Method Details

#error ⇒ Object 



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# File 'lib/rpn-calculator/result/operation.rb', line 14

def error
  "Invalid operation: #{invalid_operation}" unless valid?
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rpn-calculator/result/operation.rb', line 10

def valid?
  invalid_operation_elements.empty?
end