class Array
  def self.toy(n=10, &block)
    block_given? ? Array.new(n,&block) : Array.new(n) {|i| i+1}
  end
end

class Hash
  def self.toy(n=10)
    Hash[Array.toy(n).zip(Array.toy(n){|c| (96+(c+1)).chr})]
  end
end

class Object
  def interesting_methods
    case self.class
    when Class
      self.public_methods.sort - Object.public_methods
    when Module
      self.public_methods.sort - Module.public_methods
    else
      self.public_methods.sort - Object.new.public_methods
    end
  end
end