Chapter 15. The Finite State Machine
Who changes his condition changes fortune.
—Italian proverb
Condition makes, condition breaks.
—Scottish proverb
In this chapter we get down to the meat of describing the dynamics of the problem solution. The most basic tool for doing that in MBD is the finite state machine (FSM). The FSM is probably the most elegant and important general mathematical tool applied to software development.1 More important, it is extraordinarily applicable to OO development. That’s because the rules for FSMs explicitly enforce basic OO principles. We would be hard pressed to design a tool that provides the same degree of rigorous enforcement of things like encapsulation, implementation hiding, separation of message and ...
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