This method is used to format numerical information pertaining to credit cards.
format(2005, :two_digits) # => "05" format(05, :four_digits) # => "0005"
# File lib/active_merchant/billing/credit_card_formatting.rb, line 9 def format(number, option) return '' if number.blank? case option when :two_digits ; sprintf("%.2i", number)[-2..-1] when :four_digits ; sprintf("%.4i", number)[-4..-1] else number end end
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