Questions tagged [design-patterns]

A design pattern is a general reusable solution to a commonly occurring problem in software design.

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votes
2answers
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What are the best patterns/designs for stateful API development?

I am about to implement a API for my TCP/IP server written in Java. Right now I have a temporary method that takes a String, executes a command based on the String and returns a String basically like ...
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5answers
475 views

Does this have a name? DRY overloading?

public int foo(int x) { int defaultValue = 0; return foo(x, defaultValue); } public int foo(int x, int y) { return x + y; }
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3answers
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Recommended order for learning design patterns? [closed]

I can't help but notice the amount of design patterns that are out there. Does anyone have suggestions on an order I should learn them in? Or should I pick and choose them at random? The only one I ...
9
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3answers
3k views

Design pattern for window management in a Java Swing app

I've just started creating my very first little Java Swing app. When the program opens, it brings up a single, simple window with a label and a couple buttons. Clicking one of those buttons is ...
12
votes
5answers
2k views

Do you leverage the benefits of the open-closed principle?

The open-closed principle (OCP) states that an object should be open for extension but closed for modification. I believe I understand it and use it in conjunction with SRP to create classes that do ...
9
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6answers
602 views

Giving a presentation on "code style and design patterns" [closed]

My company (small, about 40 people across 3 offices) occasionally does "developer workshops" online where one of the devs hosts a presentation about some tech topic. It's not necessarily about our ...
44
votes
6answers
24k views

How much business logic should be allowed to exist in the controller layer?

Sometimes we have some business logic represented in the controller code of our applications. This is usually logic that differentiates what methods to call from the model and/or what arguments to ...
5
votes
4answers
6k views

Why GRASP patterns are less known than GOF ones?

Design patterns help developers to improve the quality of their design, but only GOF patterns are very known, and paterns like GRASP that gives a good concepts like Information Expert,low coupling and ...
5
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2answers
1k views

How to program for constraints/rules

First the background, during interviews in the past, many times I have been asked to design some or other variation of card game as programming puzzle, and I have tried to design it in OO way, but I ...
2
votes
1answer
433 views

PHP objects with configurable data interfaces

I have a User class which needs to load data from a variety of sources, e.g. the main user database, WordPress user metadata, authorizations from another app, etc. For the sake of organization, I want ...
3
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3answers
83 views

How to manage tailored/branded web tools?

We produce a number of analysis tools which we re-brand and customise for other businesses to include in their websites. The tools are typically product comparison, data/trend analysis and report ...
8
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2answers
1k views

Do Ruby (and other dynamic language) programmers use IoC / Dependency Injection?

I'm primarily an ASP.NET developer and the single thing i've been introduced to in recent years that has had the most dramatic impact on the quality of the code I write has learning how to use IoC ...
5
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1answer
336 views

MVC for our application?

There are some issues about how to manage our program designs and programming styles. I was assigned to find a solution to write reusable code - though, the programming team does not follow the rules. ...
5
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2answers
554 views

ORM domain design pitfalls

Are there any patterns which seem sensible when designing an object oriented domain, but do not translate nicely onto a relational database schema? If so, are there standard patterns that can be used ...
7
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2answers
304 views

Do you experiment with unconventional ways to use design patterns?

We stick to standard usages and best practices because they work and communicate intent well, but without trying new things we can't really grow. Have you ever tried something that seemed absurd but ...
3
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1answer
272 views

Why doesn't DDD consider Documents?

... that is, the inputs and outputs of service functions ? Are entities, or aggregates, allowed to leave service boundaries?
8
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5answers
485 views

How can we make software development best practices more interesting to people without a software background?

Where I work there are a few experienced software developers with a software background, but the majority of developers are physicists or chemists with excellent domain knowledge but limited ...
1
vote
1answer
312 views

What design pattern is best suitable with this context?

I have a base class Shape, and drived classes Line Segment, Arc, B-spline,... I want to find the intersection point between these shapes. I would like: Shape* a = new LineSegment(); Shape* b = new ...

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