class ABN

Public Class Methods

new(num) click to toggle source

Creates an ABN object representing the ABN number passed as the only parameter.

   # File lib/abn.rb
15 def initialize(num)
16   @number = num.to_s.tr ' ',''
17 end

valid?(abn) click to toggle source

Accepts an ABN number as a String or Bignum and returns whether or not it is valid (not checked against a database)

   # File lib/abn.rb
44 def self.valid?(abn)
45   new(abn).valid?
46 end

Public Instance Methods

to_s() click to toggle source

Correctly formats the represented ABN if valid, else returns an empty string

   # File lib/abn.rb
38 def to_s
39   valid? ? "%s%s %s%s%s %s%s%s %s%s%s" % @number.split('') : ""
40 end

valid?() click to toggle source

Returns whether the current ABN class represents a valid ABN number according to a weighting algorithm (not checked against a datbase)

   # File lib/abn.rb
22 def valid?
23   return false unless @number.length == 11
24 
25   weights = [10, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19]
26   sum = 0
27   (0..10).each do |i|
28     c = @number[i,1]
29     digit = c.to_i - (i.zero? ? 1 : 0)
30     sum += weights[i] * digit
31   end
32 
33   sum % 89 == 0 ? true : false
34 end