![]() Usually, you'll see the FSM represented like this □: Let's represent the traffic light FSM on a graphic, so we can visualize the state transitions and understand how the machine works. The transition is a mapping that defines the path of our state. The state will change in response to an input, that in our case is a timer, through a transition. The initial state of the machine is □ green and whenever one of the lights is on the output of the other ones is off. Those scenarios are called states and because the set is limited to 3 states we can say that is finite. For the sake of this consider that our traffic light has 3 colors.Īt any point in time, the traffic light will be on one of the following scenarios: I'm sure that after reading the post you'll start pointing them in the real world, trust me I'm doing it right now □Ī traffic light □ is a simple example to understand FSM. The world is full of finite state machines, in fact, you are using them every day, but probably you didn't think of them as such. ![]() Now you're probably like wtf □, this sounds scary □ and academic, right? Let's try to illustrate this definition with a real world example to understand it better. s 0 : The initial state, an element of S.δ : The state-transition function ( δ: S x Σ -> S).The FSM can change from one state to another, this change is called a transition. Let's dive in! □ #What is a finite state machine?Ī finite state machine is an abstract machine that can be in exactly one of a finite number of states at any given time. In this article, I'm going to explain the benefits of composing user interfaces using finite state machines. Did you know that □□ SpaceX used JavaScript for the spaceship flight interface? □. Finite State Machines, often abbreviated as FSM is a mathematical computation model that could be useful for building user interfaces, especially nowadays that front-end apps are becoming much more complex due to the nature of the problems that they solve.
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