gistfile1.txt

class Numeric
 def stuff=(value)
  @stuff=value
 end
end

x = 7
x.stuff='hello'

# EXPLOSION!

numeric_patch.rb

class Numeric
  attr_accessor :scale

  # NOTE: Does not affect self
  def to_scale(digits=2)
    out = self.round(digits)
    out.scale = digits
    out.extend(Formatter)
  end

  def scale(atts = {})
    max = atts[:max] || 4
    num = self
    scale = 0

    while(num != num.to_i && scale < max)
      scale += 1
      num *= 10
    end

    scale
  end
end