A design pattern is a general reusable solution to a commonly occurring problem in software design.
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Player statistics class architecture
I've made a stats hierarchy for my Unity game project, it consists of 1 base class and few derived ones.
abstract class Stats : MonoBehaviour
...
3
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Designing a toy dependency injection library
Just for learning purpose I thought to write a simple and useful dependency injection service which would just do dependency injection but also it should expose its core too which would let the client ...
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2answers
60 views
Chain of commands
I need to execute several commands in a specific order but before I excute the main command, another command needs to be executed first and in some situations there are more commands that also need to ...
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1answer
32 views
Modelling an account manager in OOP
I have this task of modelling a system where given a group of users each can keep track of their expenses. The basic requirements are as followed:
To be able to give credit to an user.
Find all the ...
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22 views
Responsibility to Validate Move in chess game? [closed]
I came across couple of software LLD to design chess game. I have a specific question where behavior to validateMove of pieces should lie ? Should it be part of piece class or validator class ?
Per ...
3
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3answers
56 views
Presenter creating Views in c# MVP
I have a c# WinForms application in which I have tried to implement the Model View Presenter pattern with Passive View. I create new Views in the Presenter of my 'home screen'. I was wondering if this ...
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Refactoring API endpoint class in Android
I have a class with multiple methods which return a URL string of an API endpoint.
Each methods takes different parameters based on what the endpoint have to include.
Example,
GET: http://api....
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2answers
43 views
No getter/setter on model with many instance vars
I have been reading a lot of material on how to become better in OOP, DDD etc. While reading Object calisthenics and Getters/Setters. Evil. Period. I got confused. Let me explain it by example.
I ...
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1answer
32 views
Framework for composing algorithms
I am implementing a game in python, which will give the user a sample encryption, and explain each step from plaintext to cipher. The task for the player is to decrypt a word by undoing each step ...
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1answer
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Json type-safe builders using jackson-annotations
I have created these builders to help creating fluent acceptance tests for my api.
I would really like suggestions for improvements because this is supposed to be a "how to" project on creating ...
3
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1answer
108 views
Try again, and again, and again… but not too often because the potatoes won't grow
The delay sequence has been fixed so I can move to the next step which are the Retry and Breaker.
(Just ignore the console ...
2
votes
1answer
48 views
A general-use For-comprehensible Loan Pattern
I use Scala's loan pattern in order to ensure and automate the resource aquisition and release after its use. When multiple resources have to be acquired at once, however, the function calls must be ...
2
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1answer
21 views
Classical model for database connection provider
Let's forget about Spring Singleton Beans and about other frameworks in Java. We have one or more simple HttpServlets. And we should make database connection. (doesn't matter what is it, hibernate ...
3
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2answers
108 views
Implementing SOLID Principles - LINQ TO SQL
I have been using Layered Architecture in my web application. Can anyone please advise if my data layer classes (both Linq and booking class) can be improved?
I have just started learning about solid ...
3
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4answers
303 views
Alternative to the Josh Bloch Builder pattern in C#
The Josh Bloch Builder Pattern (here after JBBuilder) introduced me to the idea of using a nested class to aid in construction. In Java the JBBuilder pattern is aimed at fixing the telescoping ...
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1answer
51 views
Abstracting HTTP requests to keep it simple, flexible
The project is an API that will itself make HTTP requests to external webservices.
Since this is PHP, we actually chose to use guzzlehttp.
Now the library itself doesn't matter much, but I'm scared ...
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0answers
36 views
App for system that will load ad reports
I need object analysis for this problem. Since I am new to OOP and this is basically my first project, I want to know if I am doing it right. I think it should work as it is stated in assignment (...
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2answers
72 views
Using getters and setters to change another variable C#
Is it a bad practice to use getters and setters this way?
Below is my code:
...
4
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1answer
80 views
Visitor that changes the structure of the objects it visits
Brief summary:
The vanilla GoF visitor is great for altering items within a tree of elements, but when the visitor visits an element it can only change the children of that element not the element ...
2
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2answers
77 views
A trip down the single method interface rabbit hole
I responded to this question about designing around interdependant methods with the strategy pattern.
Afterwards I started thinking about the functional additions to java 8 and wondered if I was ...
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2answers
115 views
Abstract factory using generics
I am learning design patterns and I have implemented the abstract factory using generics C#.NET. Is this implementation correct or not? Or is there any SOLID principle violation?
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5
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2answers
154 views
Simple factory pattern for cooking a pizza
I have developed a command line application which prompts the user to initially select an oven and then requests that they cook a pizza. The oven affects the pizzas cooking time. The pizzas ...
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0answers
40 views
Handling a user control that needs to be put on my form in WinForms project using MVP pattern
in my application i have a form 'DetailScreenView' which implements 'IDetailScreenView'. It is connected to 'DetailScreenPresenter' by the Passive View MVP pattern. I also have a '...
2
votes
1answer
54 views
Handling an openFileDialog in the View of my MVP WinForms project
I have a WinForms project in which I am trying to implement the Passive View MVP pattern (meaning no business logic in my Views). Each form is a concrete View with an IView interface to which a ...
2
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0answers
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Show dialog to add device and tab
I am just into redux. I am developing a dashboard using ReactJS redux and material-ui for components. It's a large app as my dashboard contains various features like add/edit/delete device, add/edit/...
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2answers
102 views
Combining two classes to hold general and specific properties of an item
I have an ItemData class in my program that stores saved data about a game inventory item that can change, such as its durability, quality, number of bullets in the ...
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3answers
83 views
Visitor Pattern/Leaky Bucket variant implementation to run an operation at a certain interval
My code is a variant on the Visitor Pattern and a "leaky bucket" variant. The goal is pretty straightforward: the "bucket" will collect a specified number of items (say, for example, 500) and then ...
2
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1answer
289 views
MVC design pattern approaches
I am actually more confused rather than understanding the concept. I have been developing a system and want to know the MVC design pattern. which one is best and the concept and usability of the ...
2
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0answers
58 views
System to process data from a specific client
I'm working on an important project. We're an IT services provider and we have a project where we have to build a new system to process data from a specific client.
The problem is that usually we ...
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4answers
108 views
Multilingual command handler using inheritance
My problem is that you have a lot of ifconditions to be checked and inside that if condition you have multiple lines of code. I ...
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1answer
33 views
UnionFind data structure implemented in Python
This class is used to create sets out of nodes to from a graph-like structure (or grouping since I remove most of the normal graph structure and all child nodes have the same parent).
Is there ...
2
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1answer
53 views
Storing global constants in app delegate or singleton
I am converting a non ARC projecs to ARC. I just found that after login in my old app, the data is stored in app delegate objects, like Home_DataArray, various ...
2
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0answers
36 views
Implementing FusedLocationProvider for more than one Activity in Android
I am trying to implement Google Maps in Android. I am also trying to learn different design patterns.
I want to use location in more than one Activity hence I have used a class named 'GoogleLocation' ...
3
votes
0answers
77 views
Factory (pattern) of Commands (pattern) with additional dependency injection (dependency inversion pattern)
What would you improve at the following code, except:
The problems I'm already aware of, marked as TODO
Line width of at most 120 characters (I've run flake8 over ...
4
votes
1answer
55 views
Words Counter using the revealing module pattern
Is the following a good way to use the revealing module pattern?
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4
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4answers
218 views
Client to connect to server and show a text menu
First of all: Sorry for my English, that said...
I am developing an obligatory for my University, so far it has a class that provides the user with options to connect to a server (once connected it ...
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2answers
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4answers
138 views
General Retry Strategy #3 with TryResult
I wanted to use the Try helper from @DmitryNogin's General Retry Strategy #2 but each attempt to implement it revealed another thing that is missing.
In my review ...
13
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1answer
163 views
Ambient Context
What do you think about this way to make logging available across the application without passing log object around? Let’s say we have something which allows us to ...
3
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1answer
77 views
Base activity for handling network state changes in Android
I had the need in one of my activies to handle displaying a message to the user when the network disconnected, and then reload the data for a RecyclerView adapter ...
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1answer
50 views
File-copying Manager
I have the following java class which has many private variables and methods:
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3
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1answer
116 views
General Retry Strategy #2
Previous version
Now supports async operations and cancellation.
Let’s say we copy some file using retry strategy (it might be blocked, etc.). App code comes bellow:
...
4
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3answers
132 views
General Retry Strategy
Let’s say we copy some file using retry strategy (it might be blocked, etc.):
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2
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2answers
56 views
Load/Save application sessions
I'm working on load/save application sessions functionality, and came up with this code:
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2answers
51 views
Compute and Display Engineering Information
I am updating a class in legacy code and having some issue with my calcPressure method. I want to make it nice and clean but there is some convolution in the ...
2
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1answer
82 views
Resository Pattern and Unit of Work with ADO.net
I am trying to implement the Repository Pattern with a Unit of work but i dont know if i am on the right direction. This is my Model
...
12
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3answers
1k views
Building car factory with custom features per car
I was once asked in an interview to build a factory that makes cars.
All cars has common features like price, rating and color and they have some features like fuel injection which can on specific car ...
1
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1answer
93 views
Using extension methods in the decorator pattern
After reading an exceptional article here about the decorator pattern applied to functions, I saw an opportunity to reduce a lot of boilerplate code in a console application project I've been working ...
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0answers
20 views
Common code in extracted into utility classes [closed]
Recently was working on a project with a lot of duplicated, but simple code. They are mostly for setting, getting and casting values e.g.
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