BSON ObjectId conversion to base X

objectid2x.rb

require 'rubygems'
require 'bson'
require 'string'


DIGITS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".split(//)

def dec2x(number, base=16)
   number = Integer(number);
   ret_hex = '';
   hex_digit = DIGITS[0,base]
   while(number != 0)
      ret_hex = String(hex_digit[number % base] ) + ret_hex;
      number = number / base;
   end
   return ret_hex; ## Returning HEX
end


oid = BSON::ObjectId.new
ii = oid.to_s.to_i(16)

puts "Original: #{oid.to_s}"
puts "Hex:      #{dec2x(ii,16).to_s.downcase}"
puts "36 :      #{dec2x(ii,36).to_s}"
puts "36 alt :  #{ii.to_s(36)}"
puts "62 :      #{dec2x(ii,62).to_s}"