Class: CheckDigit

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

Class Method Summary collapse

Class Method Details

.calculate_check_digit(number) ⇒ Object 



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# File 'lib/minidynamo/check_digit.rb', line 8

def calculate_check_digit(number)
	(10 - (check_sum(number)%10)) % 10
end

.valid?(number) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/minidynamo/check_digit.rb', line 14

def valid?(number)
	digits = to_digits number
	check = digits.pop
	check == calculate_check_digit(digits)
end