class Valabn::Utils
Public Class Methods
valid_format?(number)
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# File lib/valabn/utils.rb, line 3 def self.valid_format?(number) number = number.to_s.gsub(/\W/, '') if !!( number =~ /\A[0-9]{11}\z/) weights = [10, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19] sum = 0 numbers = number.split('').map(&:to_i) numbers[0] = numbers[0] - 1 numbers = numbers.zip(weights).map { |x, y| x * y } sum = numbers.inject(0, :+) (sum % 89).zero? else false end end