= Radix Rational

Radix also provides a Rational class. Like the Integer and Float classes
Radix::Rational delegates to an underlying instance of Ruby standard
Rational class.

  require 'radix'

  b = ["100","10"].br(2)
  b.assert = [2,1].br(10)

When convert to Array or String Radix::Rational uses `/` to separate
the numerator from the denominator.

  b.to_a  #=> [1,0,0,'/',1,0]
  b.to_s  #=> "100/10"

To use a custom character set, use an array of characters as the base
rather than an integer. For example we can convert a base 10 number
to another base 10 number but useing a different encoding.

  base = %w[Q W E R T Y U I O U]

  ["10","1"].br(10).to_a(base)  #=> ["W", "Q", '/', 'W']

  ["10","1"].br(10).to_s(base)  #=> "WQ/W"