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

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2answers
183 views

Large number of projects for a single application

I'm working on 300K line C/C++ Windows application that is spread across 23 different Eclipse projects (approximately one third for Qt interface, one third for DLLs and one third for static ...
15
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2answers
799 views

Which is better: a bunch of getters or 1 method with a selection string parameter?

Our knowledge domain involves people walking over a pressure-recording plate with their bare feet. We do image recognition which results in objects of the 'Foot' class, if a human foot is recognized ...
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4answers
300 views

“A well designed system is a testable system” [closed]

I'm thinking about something I've read in a book: "A well designed system is a testable system" and I'm wondering why it is so. Certainly, a system that is much tested is probably well designed. ...
1
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2answers
407 views

Is eventual consistency a wrong solution for e-commerce applications?

I'm reading about eventual consistency in couchDB. I'm somewhat confused by the term and its consequences on an application. Let's say I'm building a distributed e-commerce website where monetary ...
5
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5answers
1k views

Martin Fowler's Refactoring book: switch statement is using other object's data, why is that bad ? A deeper explanation is sought for.

In the code sample below the Rental object is using Movie's fields to do a switch statement. Martin says : this is a bad idea but he does not give any deeper explanation as to why ? Of course, you ...
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3answers
314 views

Is it better expose a collection or an API to the collection?

Take for example the following: public interface IManager { void AddItem(CollectionItem item); void RemoveItem(CollectionItem item); } public interface IManagerCustomCollection { ...
0
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0answers
45 views

C# Code Design Issue [duplicate]

I am building a small application and I am trying to understand the best way to approach the design. I am looking for some guidance/advice how best to approach the following issue. Please bear with ...
6
votes
5answers
2k views

Why doesn't Haskell have a 'format' function for string interpolation?

I'm trying to use Shake and I stumbled upon the following problem: there's no easy and convenient way to interpolate a string. I know about Text.Printf — it's not what I'm looking for. The ...
0
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2answers
226 views

How to remove redundant code that enables button. Or “if” statement

I got probably "micro optimization" problem. I got "History number", "Next Number", "Reset" buttons, as well "label" for text. Every time I click At "Next number" button I would like to show random ...
5
votes
2answers
411 views

How to Know When to Stop Designing? [duplicate]

First some backgrounds, I'm interning at a company that makes parallel processing hardware. We're currently working out the design for a component of our driver that is supposed to evolve over a few ...
4
votes
1answer
933 views

State pattern vs Inheritance

In the following image for the State Pattern from Applying Domain-Driven Design and Patterns: With Examples in C# and .NET I'm trying to persist the SalesOrder entity into the database. Normally I ...
1
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2answers
241 views

How to determine the better design?

What do I need to consider to determine which design I choose when I have the following scenario? There are two cases to considerer; Given T a generic class, I have to do something with multiple ...
2
votes
4answers
291 views

How to organise the different bits and pieces in an agile environment?

Trying to make our shop an agile environment, we struggle with some bits and pieces of that world. While not making it waterfally, we do have to have some sort of agreement on what a new feature needs ...
1
vote
1answer
155 views

Separating entities in the business logic layer

I am going to start a project, which in the BLL would have something like: Jumper Map Record I need to keep track of all those, so I will make probably classes which hold them, e.g.: JumperList ...
3
votes
1answer
887 views

Loose Coupling Presenter to View in MVP

We work in a Java shop here and our web application uses an implementation of the MVP architectural pattern. Our manager comes from a .NET world, where he has been exposed to the MVVM design pattern. ...
1
vote
1answer
142 views

Optimizing mindmaps by finding the least amount of redundancy

When using mindmaps, you order them based on how you think it fits best. So for instance (tab means subtree) requirements dinner food forks spoons breakfast food forks this ...
2
votes
1answer
264 views

UML diagram for an existing implementation

I have some code, which I want to present in UML, but I've stuck at one point. Let me tell you something about code's functionality. I have a workspace in which I can place some Components, select ...
0
votes
2answers
135 views

I need advice for a subsystem design?

I'm doing it in C++, I can't post the entire thing, because it's gigantic, I'll just sum it up with a simple example.I have: class B; class A { //Members and methods... void DoSomething(B* ...
14
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4answers
1k views

Phenotropic Program Design

I recently ran across an idea put forth by Jaron Lanier called "phenotropic programming." The idea is to use 'surface' interfaces instead of single point interfaces in computer programs utilizing ...
2
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3answers
287 views

Framework in which views are defined in the database - design flaw or reasonable?

I'm working with a framework where the fields displayed on each web page are defined in the application database. Administrators can add new fields to pages or hide/completely delete old fields. The ...
-1
votes
1answer
253 views

What is meant by a step-by-step refactoring plan describing implementation of design [closed]

What is meant by a step-by-step refactoring plan describing how to implement a certain design? As little as I know about refactoring it regards improving a (UML) design model and has nothing to ...
2
votes
2answers
187 views

Distribution of Event Listeners in a Distributed Service Oriented Architecture

I have a service architecture composed of services that service common areas of the application. Examples of services would be: AccountService (manages client accounts in the system) BillingService ...
5
votes
7answers
542 views

Scrum decision making versus maintainability and development time? [closed]

I appreciate that this question may be controversial. In a sense, it is the flip-side of the question "Business trying to make technical decisions". In Scrum, the development team is supposed to be ...
5
votes
2answers
704 views

Game server code design

I'm designing a multiplayer game server where the players are in rooms. Right now I have classes to take care of the client, networking, etc. I'm struggling however to find a design for this Room ...
-1
votes
1answer
292 views

When to use non-embedded databases over embedded databases [closed]

We are trying to start a web base project that need to develop based on MS technologies such as C#,.net, IIS etc. This is a web application suppose to sell as a product with a single installer. Now ...
2
votes
2answers
71 views

Ordering menu items fed from multiple modules.

I have a main application that can load modules (or plugins). Each modules can define one or more links (or items) that will be displayed in a side menu defined in the main application. Right now, my ...
1
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1answer
111 views

How to deal with hard configurations at the component level?

I distinguish three organisation levels while programming: the library level, the component level and the application level. A library defines functions to solve a range of related problems or ...
6
votes
2answers
925 views

What's the reason for C standard to consider const-ness recursively?

The C99 standard says in 6.5.16:2: An assignment operator shall have a modifiable lvalue as its left operand. and in 6.3.2.1:1: A modifiable lvalue is an lvalue that does not have array ...
5
votes
3answers
322 views

Is there a guide for software development to design efficient hotkeys for actions?

I don't know how to word this easily but basically the software I am writing has a ton of actions and I want to assign hotkeys to every one of them so power users can work super fast. First off they ...
1
vote
1answer
255 views

Create an Objective-C category to route methods depending on a specified type

For one project, I needed to find a solution to avoid code like this: if ([self.desiredColor isEqualToString:@"Red"]) [self constructRedMenu]; else if ([self.desiredColor ...
0
votes
0answers
44 views

Designing online exam [duplicate]

I need to design an online exam server for an exam like GRE in which question difficulty increases if you answer correctly and decreases if you answer wrong. Questions are multiple choice ...
0
votes
2answers
2k views

Is it a good idea to const-qualify the fields of structure in C?

Consider the following program: #include <stdlib.h> #include <stdio.h> typedef struct S_s { const int _a; } S_t; S_t * create_S(void) { return calloc(sizeof(S_t), 1); } void ...
4
votes
3answers
2k views

Building a distributed system on Amazon Web Services

Would simply using AWS to build an application make this application a distributed system? For example if someone uses RDS for the database server, EC2 for the application itself and S3 for hosting ...
5
votes
1answer
696 views

How to design application with rollback capability

I am currently working on an application (basically its a kind of execution engine capable of running user defined jobs and generate output in real time) that needs to handle rollback functionality, ...
4
votes
1answer
653 views

Inheritance in test classes

I have an interface Serializer with methods serialize and isSerializerFor. I created a first implementation of this using TDD, and ended up with a nice clean test case fully covering a nice clean ...
8
votes
3answers
304 views

Selecting the (right?) application design [closed]

While working to build software products for early stage startups, I have seen two very common schools of thought that define an approach to application design. Those 2 paradigms typically include ...
0
votes
2answers
194 views

Limiting certain functionality to development environment only [closed]

I intuitively think that an application should be exactly the same in DEV, QA, and PROD environments. However, I have been asked to add a feature to an application that will only be available in DEV ...
3
votes
2answers
247 views

How to abstract transition between Views?

Our team is developing an application using WPF with MVVM. We want to make ViewModels reusable. With this intention we want to abstract the transition logic between Views (ViewModels, we use ...
5
votes
4answers
351 views

Is it normal to write all logs into a single file?

Our teamlead said that many files much worse than a single, despite of we are working on a big project. He argued that our customers could more easily send logs to us if there will be just a single ...
2
votes
2answers
848 views

Package diagram for an MVC patterned project?

We are required to make a package diagram for our senior project. Since our project uses MVC patter design, we created an MVC class diagram, now, our problem is in creating the package diagrams from ...
2
votes
1answer
335 views

Why aren't Entities allowed to reference other entities inside an aggregate except the root?

I have read in several places this following rule concerning Aggregates: Entities in one aggregate can hold references to any other Aggregate Root, but never to an Entity or Value Object inside ...
0
votes
1answer
417 views

Design pattern for configuring objects

Context In a Cocoa application I am developing, I need to load a data model that is defined in plist files. So, I have something like: root (Array) ---- item (Dictionary) -------- name : "objects" ...
0
votes
1answer
829 views

Should the helper function in class be defined before the usage or after

I need to do the code review of fellow members. One of the member always defined the helper functions at the bottom and use them at top e,g class Sample { public function SendFile(){ file = ...
1
vote
1answer
331 views

What is the significance of the output of Function Point analysis

I am a beginner in Software Engineering principles. This question have only academic significance. I read about Function Point analysis.We will be getting an integer value as output for Function ...
4
votes
1answer
305 views

How should web development design patterns differ from software development design patterns? [closed]

I want to become a better developer, and so have been dedicating most of my free time outside of work to learning design patterns, and when to implement them (since I feel learning general patterns is ...
1
vote
3answers
289 views

Ways of developing for small system. What is expedient?

I'm developing a small system for internal automation. I use asp.net webforms and faced with a choice: develop a system architecture in an object-oriented style (development becomes more difficult ...
3
votes
1answer
220 views

How can I structure my code when I have orthogonal arrays of features?

Example: You have a game with different schools of magic (fire, ice, etc). Each school has a set of properties that pertain to independent features of the game, such as: strings to be displayed on ...
0
votes
1answer
160 views

Aggregate Boundary repository/service design

I am trying to apply DDD to the design of a Release Management system. Domain Entities Project: The project/product/system. ProjectEnvironment: The environments (Test, Staging, Prod) that exist ...
1
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0answers
34 views

SPA thin or thick architecture [duplicate]

I seek your advice on SPA (Single-page application) architecture. I'm building an SPA which edits a model. The models consists of objects which have a relation to one another. The objects (and ...
0
votes
3answers
171 views

Design for a template class

I have an abstract class abstract class MathFunc that is used to implement the mathematical functions Rastrigin, Griewangk and Rosenbrock in their specific classes final class Rastrigin extends ...