Ruby Finite State Machine

A lot of business modeling tends to involve workflow like concepts and the aim of this library is to make the expression of these concepts as clear as possible using similar terminology as found in state machine theory.

Ruby finite state machine.

Finite state machines fsms are all around us and if we open our eyes long enough you can see them in play when you buy a can of soda progress through e commerce. Finite state machine is a ruby project that demonstrates the implementation of a finite state machine with a token parser. Finite state machines may sound like a very dry and boring topic but they reveal a lot about the power of different types of computing machine. A finite state machine fsm or finite state automaton fsa plural.

This has less than 50 lines of code and provides everything a finite state machine must have and nothing. Ruby init rb f your file checkout the user manual for further usage instructions and restrictions. There are many finite state machine implementations for ruby and they all provide a nice dsl for declaring events exceptions callbacks and all kinds of niceties in general. But if all you want is a finite state machine look no further.

Automata finite automaton or simply a state machine is a mathematical model of computation it is an abstract machine that can be in exactly one of a finite number of states at any given time. They also turn out to be very useful in practice. Workflow is a finite state machine inspired api for modeling and interacting with what we tend to refer to as workflow. A finite state machine inspired api for modeling and interacting with what we tend to refer to as workflow.

The change from one state to another is called a transition. Every turing machine includes a finite state machine so there is a sense in which they come first. This video is about state machines and how to implement them in ruby. 4 8 1 4 l4 ruby adds support for creating state machines for attributes on any ruby class.

More than 50 million people use github to discover fork and contribute to over 100 million projects. A little late to the party here but i was researching this exact issue for myself and found that the gem i m currently using to manage my state machines state machine by pluginaweek has some methods that deal with this issue quite nicely when used with activerecord and i m assuming other persistence layers as well it provides a state event method that accepts a string representation of. 5 1 5 7 l4 ruby a plain ruby state machine with a straightforward and expressive syntax.