# New object
e = FStore.new

# Define a bunch of methods dynamically
e.double {|x| 2*x}
e.triple {|x| 3*x}
e.square {|x| x**2}
e.plus {|x,y| x + y}

# Then you can use them, like so:

e.double 2 #=> 4
e.triple 2 #=> 6