This does not include a finite-state machine you might have done for college.
I want to know who has had to create one and why?
What was the most difficult aspect of creating the machine?
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This does not include a finite-state machine you might have done for college.
I want to know who has had to create one and why?
What was the most difficult aspect of creating the machine?
Yes, lots of them. Basically, I had to implement lexical analyzers manually for performance reasons. Other personal uses have been in GUI designs where the FSA has controlled the flow of interaction with the user.
Creating such machines is not difficult at all. Changing them is because at least part of the structure of the FSA is embedded rigidly in the code. The state pattern helps to ease some of these transitions – but not all of them.