Questions tagged [state-machine]

A state machine is a model for designing systems which change based upon their current state and what input they receive.

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F# pattern matching to determine the state of a bank account based on past events

I am writing an event sourced system in which I need to have the state based on the events that already occurred for a given bank account. The events are defined such as: ...
4
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1answer
60 views

Implementing Hangman using a State Pattern

I decided to implement a Hangman game using an object oriented State Pattern design. This is one of my first actual OOP as I normally write functional code. Code use: ...
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2answers
151 views

Turing machine schoolwork

Our teacher doesn't give much feedback on our code itself. Was just looking for some feedback on how I could improve on this. This is the method that tests the string against the Turing machine that ...
3
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1answer
48 views

Finite state machine for chasing and attacking a target

My questions are: How can I improve my implementation of the FSM model? Should Finite State Machines have functionality for Adding and Removing states from table? (Since I can only be in one state at ...
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0answers
23 views

Java UIState System

I am trying to come up with a UIState system that works well with Java UI. Before I show it I know I could add enums to help distinguish the states but I've left that out for simplicity. Here is what ...
7
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1answer
209 views

Designing yet another a state machine

I wanted to design a state machine with a few goals in mind: Encapsulate state logic within individual classes to keep them decoupled. (I'm very curious what the community thinks about this in ...
2
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1answer
82 views

Scheme: FSM substring search

I have been working on a function that return a FSM that searches a specific word based on the argument of the constructor. The idea was to use those routines as means to learn about regular ...
3
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1answer
161 views

C++ CLI Console Menu Statemachine

I am trying to find the best way(/most efficent way) to setup my console program's menu. The way I have it set up is that I have a Menu class and then I use a menu pointer called currentMenu and I ...
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3answers
416 views

Finite State Machine in C++

I made a state machine. You can press 0 and 1 to switch between the hypothetical menu and playing state. I hope you can help me improve it further. StateManager.h ...
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0answers
56 views

static macro-based State Machine implementation

While learning Rust for the past couple of weeks, I set out to use the type-system to build a static State Machine implementation in Rust. The goals: program in idiomatic Rust no runtime overhead ...
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0answers
126 views

21 Game (Nim) as Finite State Machine in Python

Feedback from previous posts of mine suggested that my approach to states was haphazard, which is not surprising since I hadn't really thought of games in terms of states before. I have since gone off ...
6
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2answers
207 views

Finite state automata

This is a non-deterministic finite state automata (NFA) meant to be used with a Regex engine. To show some example usage, suppose you wanted to construct an NFA for the regex ...
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0answers
619 views

Finite Automata stub in Rust

I wrote a finite automata implementation in C years ago. C's access to mutable, unsafe, raw pointers made it quite simple for me to link/relink the states of a finite automata. I read the official ...
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60 views

Finite State Machine to segment Thai syllables

I am developing a FSM to segment Thai syllables with the following rules: Here are my util functions: ...
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1answer
307 views

Implement a Finite State Machine in ES6 [closed]

I have built a simple finite state machine that models an even simpler fictitious bank account system. Any given account can be in one of three states at any time: Open, Closed, or Held. I have a ...
2
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1answer
136 views

Push Down Automaton to detect RNA hairpins

For one of my assignments I am supposed to write a Push Down Automaton. It's supposed to receive a string that has to be checked if it's an RNA Hairpin. For example: gacgcaaguc would be one, since ...
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0answers
36 views

3 state switch for a table sort

I have a data table with 7 columns. The first column is the index that increases from 1 to N and is considered to be in ascending order by default. The remaining columns are unsorted. I need to be ...
2
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1answer
44 views

Python coroutine structure

I've completed Advent of Code's Day 9 in Python3, trying to use it to teach myself coroutines. I'm very familiar with generators, but I've pretty much never used coroutines before. I've ended up with ...
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1answer
180 views

Simple state machine based command-line argument parser

I'm in the process of learning to write idiomatic JavaScript code so naturally I'm parsing command line arguments. My approach to this is to have a simple state machine. The parser should work as ...
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0answers
53 views

“Academic interest” implementation of a Finite State Machine

Context I'm playing around the concept of a Finite State Machine. While I understand the basic principles behind it, I want to implement a simple, yet generic class which could be reused in the ...
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2answers
737 views

DFA creation from string

I have fairly simple Python 3 code that creates a DFA from a string. It works great, but I believe it can be made more efficient. There are a total of 3 loops: First iterates over the string Second ...
4
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1answer
354 views

Mars Rover problem in J

I've written an implementation of the "famous" Mars Rover simulation, (another question on this) whose problem statement is this: The first line of input is the upper-right coordinates of the ...
2
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1answer
514 views

Stack-based state machine

Is everything alright with this code? What can I add to it? state.h: ...
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2answers
187 views

Alternative to nonlocal for local variables in a function with nested functions in Python

Introduction for future readers I posted the code below in the hope that it would be a good example to discuss the topic "Alternative to nonlocal for local variables in a function with nested ...
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0answers
53 views

Time-dependent state machine with two outputs

Given a class BasicDataFeed whose purpose is to feed questions and answers into an artificial neural network, which is tested in a non-negotiable manner as follows: ...
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2answers
10k views

Very simple finite state machine

I have beginner knowledge of C++ and using that and some self dummy design I came up with the above implementation. The FiniteStateMachine here first asks for the ...
2
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1answer
508 views

Tennis-Refactoring-Kata through OOP

I was trying to solve Tennis-Refactoring-Kata. This seems quite hard at startup but, through use os OOP it can be deeply refactoring using just a single if. My ...
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2answers
119 views

Stateful implementation of TicTacToe

I made a TicTacToe implementation using State pattern in Java. I was wondering if this could ...
2
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1answer
233 views

Regex to DFA parser in Dart

I've created a Regex to DFA parser, using Thompson's construction algorithm and epsilon-reduction. Here is the code: builtins.dart: ...
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1answer
331 views

Designing posts: state machine

In the Object-Oriented Design Pattern Implementation chapter of the second edition of The Rust Programming Language, the basic code structure is given and it suggests trying to add features: This ...
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0answers
70 views

STTCL FSM framework based on the GoF State Pattern, Part III: Policy based design of higher level State Machine constructs

Preface I have decided to let my pet project created some years ago to undergo a code review here. The review will be broken into parts according to meta question Multiple reviews or one big review?...
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0answers
45 views

STTCL FSM framework based on the GoF State Pattern, Part II: Abstraction of asynchronous/concurrency features

Preface I have decided to let my pet project created some years ago to undergo a code review here. The review will be broken into parts according to meta question Multiple reviews or one big review?...
7
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0answers
285 views

STTCL FSM framework based on the GoF State Pattern, Part I: The basic interfaces

Preface I have decided to let my pet project created some years ago to undergo a code review here. The review will be broken into parts according to meta question Multiple reviews or one big review?...
1
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1answer
39 views

How to refactor / re-architect the components/state here in ui-router app [closed]

https://plnkr.co/edit/bOZW1a9u62W1QA6cYjYj?p=preview My goal has been to separate the Dashboard states from the Feed state. ...
6
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1answer
70 views

Arduino controller to control the backlighting of a gear selector

Background The gear selector on a car allows the driver to select which state the transmission should be in. In the example picture, one of the five letters (P, R, N, D & S) lights up to ...
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3answers
838 views

Efficient data-driven finite state machine

In creating this answer to a recent question, I thought I might write a fully worked example that implements a finite state machine in C. The purpose is to implement the following function: ...
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1answer
129 views

SafeBox StateMachine implemented with Enums

does someone has any opinions about this SafeBox StateMachine? ...
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1answer
215 views

Defusing a bomb using a state machine

This code is a solution for /r/daily_programmer #293. The idea of this challenge is, you are given input in the form of colored wires: ...
5
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1answer
77 views

Logon state management

I'm in the process of writing a simple text based MUD. First up is making sure that it's possible to create new players / logon with existing players. Since everything is text based, there are ...
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1answer
45 views

Handling workflow rules for a job application process

For some reason I always have a negative feeling towards having many if statements in my JavaScript functions. But I've got some code that is processing an object ...
4
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1answer
197 views

Time-dependent state machine

I keep having to write state machines that depend on time for various experiments I run and I'd like to know how to write them better. This state machine is for training a neural network by feeding in ...
4
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1answer
4k views

Event-driven finite state machine DSL in Kotlin

I wrote a DSL for defining a finite state machine. My robotics team wants to use a state machine to manage the state of the subsystems on our robot, like the arms, drive train, lifter, etc. Each ...
7
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1answer
1k views

Implementation of tokenizer object and finite state machine in C

I was given an assignment to create an implementation of a tokenizer object (by object, I mean a struct with associated functions that operate on instances of the struct). This tokenizer retrieves ...
5
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1answer
84 views

UTF8 Codepoint decode and length v.2

This is the complete rewrite of a function to decode an UTF-8 codepoints and return the encoding length (or 0 if the codepoint is ...
0
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1answer
55 views

Controller method to modify Active Directory, other systems, and send notification with error handling

I have to handle an Action (Modify) about my web application. The app working with SMTP Email, ActiveDirectory, External System (...
6
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2answers
2k views

Simple ini file parser

The below is a C++ parser for a reasonably simple INI grammar (although my understanding is that there isn't an official spec as such). My grammar is roughly: ...
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0answers
378 views

Linear finite state machine in ES6

I would love some feedback on my linear finite state machine. I say linear, as it can only handle one state at a time. I am also giving my method of how I -work- with the state machine, as I would ...
3
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0answers
37 views

Backbone.model based state machine

I have created a class to keep track of some internal states. You can see it as a very simple implementation of a state machine ...
10
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1answer
268 views

Parse regular expression

Task: This function searches given null terminated string pStr by given subset of regular expression pMatch. Return value is ...
6
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1answer
1k views

Simulate Turing machine

I have written this code to simulate a Turing machine and wonder what could be improved. In particular, the --tape.end() seems a bit dodgy. ...