Design Patterns in .NET Core 3: Reusable Approaches in C# and F# for Object-Oriented Software Design

© Dmitri Nesteruk 2020

D. NesterukDesign Patterns in .NET Core 3https://doi.org/10.1007/978-1-4842-6180-4_22

22. State

Dmitri Nesteruk¹  

(1)

St. Petersburg, c.St-Petersburg, Russia

 

I must confess: my behavior is governed by my state. If I didn’t get enough sleep, I’m going to be a bit tired. If I had a drink, I wouldn’t get behind the wheel. All of these are states, and they govern my behavior: how I feel, what I can and cannot do.

I can, of course, transition from one state to another. I can go get a coffee, and this will take me from sleepy to alert (I hope!). So we can think of coffee as a trigger that causes a transition of yours truly from sleepy to alert. Here, let me clumsily illustrate it for you:¹

        coffee

sleepy --------> alert

So, the ...