Class: LuhnAlgorithm

Inherits:
Object
  • Object
show all
Defined in:
lib/luhnAlgorithmCheck.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(num) ⇒ LuhnAlgorithm

Returns a new instance of LuhnAlgorithm.



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# File 'lib/luhnAlgorithmCheck.rb', line 4

def initialize(num)
  @num = num
end

Instance Attribute Details

#num ⇒ Object (readonly)

Returns the value of attribute num.



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# File 'lib/luhnAlgorithmCheck.rb', line 2

def num
  @num
end

Instance Method Details

#luhn_valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/luhnAlgorithmCheck.rb', line 8

def luhn_valid?()
 num.scan(/\d/).reverse.each_slice(2)
    .sum { |i, k = 0| i.to_i + ((k.to_i)*2).digits.sum }
    .modulo(10).zero?
end