gistfile1.rb

  def self.first_uninteresting
    last = 0
    Number.all(:order => "number").each do |n|  # Number.find/all will return an enumerable, so you can each it directly.
      return last + 1 if n.number.to_i != last + 1  # if's can be on the same line at the end for basic tests
      last = n.number.to_i #ops forgot the number casting
    end
    last + 1 # Ruby will automatically return the last valuation, no need for 'return'
  end