Questions about problem solving and planning for a solution through software design.

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2
votes
1answer
99 views

Building a string parser for user command and control?

My goal is to build a command parser that has basic syntax and multiple possible branches at each point. These commands come from users of the system and are text input (no GUI). The basic syntax is ...
4
votes
3answers
319 views

database design, how to handle freelancers

The context i'm modeling a database for a small ERP system. However I've recently hit a difficult spot that I'm having a hard time wrapping my head around. The logic of it involves a few special ...
0
votes
2answers
153 views

Is this instance of mixing FP and OOP a good design?

I had a strange-feeling pattern come up in some code I was writing. In a project with user accounts, there was a lot of code that needed to do common things such as creating accounts, deleting them, ...
3
votes
1answer
206 views

Is this caution in Android API documentation an indication of suboptimal design?

The content below is from the Android developer site: According to the phrase it is expecting the developer to store this info in his head. Shouldn't this be simple if they kept only ...
1
vote
1answer
120 views

Are CRUD operations intended to be used with collections?

CRUD operations, by definition are... interfaces that permit users to create, remove, modify or retrieve data Implementations of CRUD interfaces can come in various shapes and sometimes they are ...
1
vote
2answers
119 views

Why do IoC containers provide public Resolve method(s)?

In my opinion it just inverses the inversion and could make new users (including myself) make incorrect assumptions about using IoC containers. It can be used for the Service Locator (anti-)pattern ...
1
vote
2answers
249 views

Email service or simply abstract email out and call from?

Got a fairly large web application in asp.net using C#. Also have a mobile setup using a common api that we wrote to basically share data across both of our apps using web methods and common classes. ...
11
votes
4answers
676 views

Is it an overkill to wrap a collection in a simple class only for the sake of better readability?

I have the following map: Map<Double, List<SoundEvent>> soundEventCells = new HashMap<Double, List<SoundEvent>>(); This HashMap maps double values (which are points in time) ...
0
votes
0answers
99 views

How far to go when future proofing fluent-method-chained-DSL test code?

Is it worth implementing interfaces, or using the getThis() trick, or even static factory methods to future proof against the need to extend this DSL? The current design is a pair of thin ...
0
votes
0answers
34 views

Efficiently extracting data from pdf with a template system?

basically allow a user to label specific text in a pdf file. Use the label information to create a template, which a script uses to extract text from specific pdf. What would be a good pattern to use ...
0
votes
1answer
81 views

Properly design program database to reflect organization structure

I'm having trouble setting up my program's database the 'right' way. I was hoping you guys could give me suggestions on doing it properly. I am creating a database+client for a non-profit organization ...
2
votes
1answer
112 views

How do I avoid duplicating utility functions across modules?

I've seen this question but it doesn't help me because I'm writing functional code (Standard ML) and the answers there are heavily focused towards OOP (the OP is advised to use the Facade pattern, to ...
1
vote
2answers
77 views

View model structuring best practise

What is the preferred convention for structuring view model properties? It is better to use generic or more specific property names? Let's have a user, the page where this user will be displayed ...
0
votes
0answers
30 views

MongoDB Embedded vs Reference Private info

I have searched extensively for a similar Mongo schema design and can't find relevant examples. I have a store (with public info), each store has an account (with private account info). // store ...
4
votes
2answers
272 views

dealing with a very large state machine in a class

I am currently implementing a class for a network protocol. The protocol uses a quite complex and extensive finite state machine. A pair of an event plus a state is mapped to a function, which does ...
3
votes
4answers
192 views

Wrap all external calls with flag to fight against recursion and double-entry?

Producing predictable output for each possible input is the responsibility of each module. For example (in C#): class Logger { public ITextWriter Writer { get; set; } private uint counter; ...
0
votes
1answer
66 views

Allow entities owned by one user to be referenced by other users' entities

I am working on an Asp.NET MVC web application. I have the following (simplified) entities: public class Course { public int Id { get; set; } public string Name { get; set; } public ...
2
votes
2answers
89 views

Static Test-Data in Helper Class: Getter vs Public Constant

Currently I am in process of writing large batches of Unit-Tests in the Project I am working on. Additionally we recently Introduced GUI-Testing. This project is a relatively simple webapp, on basis ...
0
votes
1answer
204 views

Git structure for java project

I know there are multiple posts on similar problems, so please be kind with me. I am asking for suggestions I have not thought of and for good advice. I have a java "project" that is structured in a ...
1
vote
0answers
100 views

How can I put multiple hierarchical forms in a single web page and avoid making it a mess?

We are a group of developers working on a web application that accepts forms filled and sent by our users and present it in an overall view. Our main form view looks like this: There are multiple ...
0
votes
2answers
114 views

Traffic splitter on a single server for 50+ krps [closed]

I am building a "splitter" for web traffic: a web server that will receive an HTTP request, forward it to two backend servers, choose the best response (for which it needs to parse all of them) and ...
2
votes
2answers
534 views

How to model users accounts in ASP MVC Framework with Entity Framework using code-first approach?

How do you design your code-first approach in entity framework when your code should include user data (name, password...) without repeating/overwriting what the MVC framework will generate in terms ...
1
vote
1answer
88 views

Is routing a site with RESTful not the best when you have very long URLs?

I've read a lot about RESTful, but I have always had a hard time figuring out how I'd use it with a very long query string. This is an in-house project, and it won't always have a simple /someAction ...
2
votes
1answer
67 views

Drawing a custom rendered control in Windows - resizing

Some background: in order to learn GUI programming and drawing in Windows I'm starting to create my own GUI toolkit in Windows (so this is a didactic exercise, please don't suggest "use Qt" or "use ...
8
votes
2answers
326 views

Applying the principles of Clean Code to functional languages

I'm currently reading Robert Martin's Clean Code. I think it's great, and when writing OO code I'm taking his lessons to heart. In particular, I think his advice to use small functions with meaningful ...
1
vote
1answer
143 views

Entity Component System Coupling

Lately I've been working on a small personal project which is basically an Entity Component System framework with autoupdated Systems. While I have a pretty good idea on the way the framework should ...
3
votes
3answers
212 views

How would you rewrite/refactor this ? [duplicate]

Old application that is used by 50-60.000 paying customers. Company is several hundred people big. Application has a lot of business critical code (30% of all code) written in classic asp. Application ...
3
votes
2answers
159 views

Ranking players depending on decision making during a game

How would I go about a ranking system for players that play a game? Basically, looking at video games, players throughout the game make critical decisions that ultimately impact the end game result. ...
1
vote
0answers
120 views

Why should ViewModel route actions to Controller when using the MVCVM pattern?

When reading examples across the Internet (including the MSDN reference) I have found that code examples are all doing the following type of thing: public class FooViewModel : BaseViewModel { ...
1
vote
2answers
261 views

Advice on approaching a significant rearrangement/refactoring?

I'm working on an application (hobby project, solo programmer, small-medium size), and I have recently redesigned a significant part of it. The program already works in it's current state, but I ...
1
vote
2answers
326 views

C# inherit from a class in a different DLL

I need to make an application that needs to be highly modular and that can easily be expanded with new functionality. I've thought up a design where I have a main window and a list of actions that ...
4
votes
2answers
134 views

Strategy to use two different measurement systems in software

I have an application that needs to accept and output values in both US Custom Units and Metric system. Right now the conversion and input and output is a mess. You can only enter in US system, but ...
1
vote
2answers
45 views

Should I reference a CopyOnWriteArraySet from the Set interface?

There are two ways to use a CopyOnWriteArraySet: // A Set<Object> set = new CopyOnWriteArraySet<>(); and // B CopyOnWriteArraySet<Object> set = new CopyOnWriteArraySet<>(); ...
0
votes
2answers
133 views

Interface (contract), Generics (universality), and extension methods (ease of use). Is it a right design?

I'm trying to design a simple conversion framework based on these requirements: All developers should follow a predefined set of rules to convert from the source entity to the target entity Some ...
0
votes
1answer
90 views

Single database, multiple system dependency

Consider an environment where we have a single, core database, with many separate systems using this one database. This leads to all of these systems have a common dependency, which ultimately ...
0
votes
1answer
62 views

How should I design a wizard for generating requirements and documentation

I'm currently working in an industry where extensive documentation is required, but the apps I'm writing are all pretty much cookie cutter at a high level. What I'd like to do is build an app that ...
3
votes
2answers
209 views

How do programmers handle several versions of a same program? [closed]

A lot of apps, for instance, have a free version and pro version. Do programmers, when a new update is released, remove lines of code that shouldn't be available in the free version? As for Visual ...
1
vote
4answers
131 views

When should a method of a class return the same instance after modifying itself?

I have a class that has three methods A(), B() and C(). Those methods modify the own instance. While the methods have to return an instance when the instance is a separate copy (just as Clone()), I ...
5
votes
6answers
499 views

Requesting feedback on my OO design

I'm working on an application that creates music by itself. I'm seeking feedback for my OO design so far. This question will focus on one part of the program. The application produces Tune objects, ...
3
votes
1answer
146 views

What is the right way to process inconsistent data files?

I'm working at a company that uses Excel files to store product data, specifically, test results from products before they are shipped out. There are a few thousand spreadsheets with anywhere from ...
1
vote
0answers
81 views

JS closures - Passing a function to a child, how should the shared object be accessed

I have a design and am wondering what the appropriate way to access variables is. I'll demonstrate with this example since I can't seem to describe it better than the title. Term is an object ...
1
vote
1answer
127 views

Changelog Management [closed]

I'm currently developing a WinForm application. In order to inform the client about the improvements and corrections made during the last version, I would like to manage and display a changelog. I ...
0
votes
2answers
104 views

How would you create a program where two objects randomly move throughout the screen BUT never collide? [closed]

they are free to move anywhere on the screen weather in straight lines or curved ones just as long as they don't be at the same place at any given time. btw I'm not asking how to write it in code, ...
1
vote
2answers
113 views

Where should the “not empty field” validation code be written on a 3-layer application?

When working with the 3-layer model, where should the validation code be placed? for: not empty fields, unchecked options, null values, wrong-written dates, etc. To keep total isolation between a ...
3
votes
2answers
355 views

How to layer if statements when order of logic is irrelevant?

Basically I have a series of logic in my website that can lead to 5 total outcomes. Basically two different if tests and then a catch all else statement. For example: if cond1: if mod1: ...
1
vote
0answers
60 views

Dealing with class optional dependencies

I am wondering how are you guys handling an optional class properties. Let's say I have a product that can bud doesn't have to have a color property. Is that really the best way of doing that? Should ...
0
votes
2answers
202 views

How often do you refactor or restructure your code in long term projects? [duplicate]

As developers we are always eager to learn new things and better ourselves at what we do. You've all had moments when you look at your old code and get that feeling: "WTH, I can't believe I used ...
0
votes
1answer
119 views

How to generalize a classes that has identical function plus some additional function

I have some designing problems with my project. To illustrate my problem, I'll use the following two classes from my project. public class RAM_UserManagement{ private Map<int,User> userList; ...
1
vote
2answers
319 views

How to approach program design with respect to data strucutres and algorimths - is there an equivelant of the OO design process for d.s.'s + algs? [closed]

My applogies for probably the worst written body of text I have produced in my life and many thanks to those willing to plough through it all. I was (and still am) not able to clearly express what I ...
0
votes
2answers
93 views

Which layer should service errors be handled in?

I am coding in a multitier architecture in Java, and I perform a query to a web service. Is it better form for the errors returned by the service be handled in the data access layer or in the ...