Class: Faker::NationalHealthService
- Defined in:
- lib/faker/default/nhs.rb
Constant Summary
Constants inherited from Base
Base::Letters, Base::Numbers, Base::ULetters
Class Method Summary collapse
Methods inherited from Base
bothify, disable_enforce_available_locales, fetch, fetch_all, flexible, letterify, method_missing, numerify, parse, rand, rand_in_range, regexify, resolve, respond_to_missing?, sample, shuffle, translate, unique, with_locale
Class Method Details
.british_number ⇒ Object
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# File 'lib/faker/default/nhs.rb', line 6 def british_number base_number = rand(400_000_001...499_999_999) # If the check digit is equivalent to 10, the number is invalid. # See https://en.wikipedia.org/wiki/NHS_number base_number -= 1 if check_digit(base_number) == 10 "#{base_number}#{check_digit(base_number)}".to_s .chars .insert(3, ' ') .insert(7, ' ') .join('') end |
.check_digit(number = 0) ⇒ Object
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# File 'lib/faker/default/nhs.rb', line 18 def check_digit(number = 0) sum = 0 number.to_s.chars.each_with_index do |digit, idx| position = idx + 1 sum += (digit.to_i * (11 - position)) end result = 11 - (sum % 11) # A value of 11 is considered the same as 0 # See https://en.wikipedia.org/wiki/NHS_number return 0 if result == 11 result end |