Method: FFaker::CompanyIT#partita_iva

Defined in:
lib/ffaker/company_it.rb

#partita_iva ⇒ Object

Calculated using the algorithm at it.wikipedia.org/wiki/Partita_IVA to return a valid Partita IVA (Italian VAT number)

Returns:

  • a valid Italian VAT number (Partita IVA)



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# File 'lib/ffaker/company_it.rb', line 30

def partita_iva
  matricola = Array.new(7) { rand(0..9) }
  office_code = fetch_sample(PIVA_OFFICE_CODES)
  base = matricola + office_code.chars.map(&:to_i)

  # Thanks https://stackoverflow.com/a/9189731/1627766
  sum = base.reverse.each_slice(2).flat_map do |x, y = 0|
    [(x * 2).divmod(10), y]
  end.flatten.sum

  control_digit = (10 - (sum % 10)) % 10

  (base << control_digit).join
end