FStore.rb

class FStore
  attr_accessor :dynamic_methods
  def initialize
    @dynamic_methods = []
  end
  def mix(s1, s2, s3, &block)
    name = "#{s1.to_s}_#{s2.to_s}_#{s3.to_s}".to_sym
    self.send(name) {|a,b| send(s1, send(s2,a), send(s3,b))}
  end
  def method_missing(symbol, &block)
    if block_given?	
      self.class.send :define_method, symbol, &block
    else
      bdy = proc {|*x| symbol}
      self.class.send :define_method, symbol, bdy
    end
    @dynamic_methods << symbol
    symbol
  end
end