A methodology that enables a system to be modeled as a set of objects that can be controlled and manipulated in a modular manner

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2answers
83 views

What is the accepted practice for handling numeric conversions under OOP?

I am making a weather app that involves temperatures. You can change between Kelvin, Celsius, and Fahrenheit just for fun. However, temperature figures get used all over the place in different ways. ...
-1
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1answer
104 views

Is there an official name for the “one object disease” anti-pattern (iterative single object operations on databases, services etc.)?

It is caused by the naive programming paradigm: focus on just a single object, do something with it, and if you have to work with many objects, you loop, iterate and traverse, repeating the operation ...
1
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3answers
82 views

Should I keep “redirect only” methods in my Controller?

Controller: function indexAction() { if ($condition) $this->renumPosition($id); //LINE #1 } //Redirect only - function's sole purpose is to call another function function ...
6
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2answers
157 views

Is there such a thing as a workflow pattern? or how to do a workflow properly?

(and alternatives to a workflow engine) Problem: I have various inputs with various attributes. For example {name: john, country: US} and {name: Jose, country: MX} And I have the following workflows ...
-1
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3answers
195 views

What to do with database foreign keys in an entity class?

I know that an attribute defines the state of an object. So, is it correct to keep attributes that don't define the state of an object of a class? For example, I have an Employee class, which has ...
3
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6answers
318 views

Can we say “If a parent class never appears in my codes except in its child class, it should be composition instead of inheritance”?

I read some posts about "composition over inheritance","where to use composition/inheritance" , "Is-a relationship..." or "Liskov substitution principle" for some time, but I am not sure if I get the ...
2
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2answers
112 views

Should we add an extra class to this code sample

I have a shopping website which allows users to place orders. In my web application when the users click 'Create Order' i call an OrderService class which looks like the below: public class ...
0
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4answers
258 views

How to convince “old” co-workers of the merits of OO for certain applications [closed]

I am working as SAP developer, where in many cases you have traditional requirements to applications (reports): Read in some data from the database or a file Do some magic with that data, e.g. do ...
1
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1answer
111 views

Alternatives to anonymous class

In the language I work with, Progress OpenEdge 11.5.1, there is nothing like anonymous classes. However, the system design would really benefit the use of such classes. Is there some nice known way ...
2
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1answer
126 views

Are nested private classes considered composition?

Background I am considering a design that includes a public API class containing many nested private classes. I am doing this for the following reasons: Why private nesting? They will have no use ...
0
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2answers
200 views

Per my design requirements, does this design hierarchy seem reasonable?

Background Construction Note that I am using C# here, but it may not be necessary to provide input to my conceptual questions about design. Consider the following design methodology... I work at a ...
0
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3answers
276 views

Java constructors confusion? [closed]

public class example { private String one; private String two; public example(String one, String two) { this.one = one; this.two = two; } public static void ...
4
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3answers
201 views

What is the purpose of writing functions and methods? When should you make a snippet of code into a function or method?

I have a philosophical disagreement with one of my co-workers, and I'm trying to get back to basics here. What is the purpose of a method? In this question, consider this example. I was criticized ...
1
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2answers
168 views

Is a an object Necessary or can I still use a DataTable

I'm currently working on a fund project and I have it set up so I get the holdings from my database and store in in to a DataTable to process. I've created a function where my Database results are ...
19
votes
5answers
4k views

Is it okay for a class to use its own public method?

Background I currently have a situation where I have an object that is both transmitted and received by a device. This message has several constructs, as follows: public void ReverseData() public ...
0
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0answers
108 views

How do I replicate my object-ish style from Python into Golang?

I've been going around in circles on this for a while Googling and reading, time to ask experts. When coding my common approach is to create a type of thing and add it to some sort of list with ...
4
votes
3answers
71 views

Using Multiple 'Sub-types' vs a larger single type?

I have a user model in an application that I'm working on, which currently uses sub-types to encapsulate properties depending on what type of user you are - I just can't help but think that this is ...
8
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4answers
2k views

Why would passing objects through static methods be advantageous?

Why would there be an advantage to use a static method and pass the reference to an object as a parameter rather than calling the method on an object? To clarify what I mean, consider the following ...
3
votes
1answer
119 views

Avoiding tightly coupled class definitions in Python for has-a relationships

I have the following code: class Car(object): def __init__(self, my_id): self.my_id = my_id self.color = color self.brand = brand self.get_color() self....
1
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1answer
135 views

Is it sensible to write a wrapper to use an OO library in this procedural project?

I am writing a program using a procedural style. At most I have some modules where the logic is present (one to retrieve data from, one to display the info, one with the saving logic, etc.), but my ...
242
votes
17answers
18k views

Why have private fields, isn't protected enough?

Is the visibility private of class fields/properties/attributes useful? In OOP, sooner or later, you are going to make a subclass of a class and in that case, it is good to understand and being able ...
9
votes
3answers
322 views

Are Python mixins an anti-pattern?

I'm fully aware that pylint and other static analysis tools are not all-knowing, and sometimes their advice must be disobeyed. (This applies for various classes of messages, not just conventions.) ...
-1
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1answer
133 views

Does this pattern have a name?

I have a large XML file that I extract information from. I am extracting the information using a list of classes with a main method of the type ParsedValue[] GetValue(BigXmlFile). This is a bit like ...
11
votes
4answers
917 views

Why is there no consistent definition of essential concepts to OOP?

I am very new to coding and a bit confused from reading\hearing different conventions from different sources: Does Object-oriented programming have 4 or 5 concepts? As a newcomer, I understand these ...
5
votes
1answer
471 views

Are we abusing static methods?

A couple of months ago I started working in a new project, and when going through the code it stroke me the amount of static methods used. Not only utility methods as collectionToCsvString(Collection&...
5
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2answers
88 views

Should Modelling Document Analysis?

I use UML I, like most (I think), use UML as my main diagramming toolset. UML is clear and useful for representing OOP and has sufficiently diverse diagrams that there is something for whatever area ...
1
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2answers
312 views

Multiple instance of the same class?

I have a class named "Category" to handle all the operations and data about my categories. Now, my class is created however I need to find a way to build an object for each of the categories in my ...
1
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4answers
110 views

File-Directory Implementation: Does a a file have to own a reference to it's dir?

I am currently issuing a problem while forming the program-design, which is exact like a File-Directory relationship, and to ease it, I am using that as an example. I think it is usual, that a ...
2
votes
2answers
81 views

How do I decide whether to make an Input/Output data type an array or a class?

I have some input that I send to a computational library, which processes the input and produces some output. Question: What considerations do I take into account to help me decide whether the ...
4
votes
1answer
213 views

Do I have to stop using Dependency Injection to keep object debug printouts small?

Say I have a large object - think EntityManager of an ORM such as Doctrine, or a custom DAO object, or what have you. Object, output of which is required to be used inside a class, but the object ...
1
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2answers
138 views

Safety of magic setters in PHP

I don't know how in else languages, but in PHP seems to me that they are very unsafe way how to set value of any member variable - because one setter cannot easily validate input for many variables (...
3
votes
1answer
99 views

PHP OOP, structuring my objects properly

I have an architecture similar to this: User (Name, Email, ID...) ---- Studios (Name, Location, Description...) ---------- Videos (Title, Description, URL, Length, Views...) Simply put, a user can ...
1
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0answers
58 views

Creating duplicate instances of objects for timeline functionality

I am working on a Spring-MVC based project, in which I would like to add Timeline functionality. The most important object in our project is the Note, there are objects associated with it like ...
7
votes
2answers
258 views

Object reading from file, violation of SRP?

I am writing a physics simulation program in C++. I am a novice in OOP and C++. In my program, several objects need to be initialized based on data from an input file. For example, an imaginary ...
1
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0answers
143 views

OOP - Modeling a Chat Design Review [closed]

Seeking thoughts on the following design. I know the design could be lot simpler if use Sockets. But I wanted to think of a design with pure POJO classes. User string id; string displayname; ...
1
vote
5answers
156 views

Can variable names match field names? [closed]

Microsoft suggested that variable names should not match field names. However I saw this extensively in Java (e.g., this tutorial), especially in setters and constructors. So, among these two styles: ...
3
votes
1answer
324 views

Bad c++ code design? [closed]

This is bothering me a long time. I feel like I am doing mistakes on the code design relative to the performance. I never had any teacher to indicate my mistakes so its hard to me to make it right in ...
7
votes
2answers
186 views

Am I using Zend Form library correctly? (I am effectively duplicating work in Controller and in View)

Brief Summary This question is asking for guidance on how to deal with Zend Form library that allows me to specify how to construct each form element (Controller side) and how to render each element (...
1
vote
2answers
139 views

swift typealias vs empty inherited class

I am working on JSON model classes in a swift project. Examples of the sample JSON and classes are below. In the JSON response, there can be many different unique statistics returned, but they all ...
2
votes
2answers
130 views

Abstraction on Iterator Pattern?

Recently, I had the task to implement a research project where I had to read an XML file. XML file contained a list of messages that I had to send to some other system on a specific port. Each message ...
0
votes
2answers
203 views

General term for T[], T*, and T& [closed]

An array of T, a pointer to T, and a reference to T (represented as T[], T*, and T& respectively by Type.ToString) all share the similarity that they are constructed from an "element" type (which ...
3
votes
1answer
129 views

Confused about approach I should take to designing classes for a card game

My primary goal is to create a Euchre game in Python. Euchre card games are rare on the Linux platform, no matter the language or the desktop flavor of choice. For now I want to be able to just ...
3
votes
0answers
91 views

How to think about a schedule that pulls from a database as objects

I am working on a personal project using Python. I have been using version control to the best of my abilities and if you would like to check it out and run the app https://github.com/CodeAmend/old-...
0
votes
1answer
40 views

Boolean flags in Presenters to control flow of execution

I can see people use boolean flags, especially in Controllers / Presenters, to control the flow of execution. For example, public void onButtonClicked() { hasButtonClicked=true // code here }...
3
votes
4answers
161 views

Low-level error handling

I am working with some low-level (by that I mean code that can't use C++ exceptions and/or the standard library) code that makes heavy use of classes. Basically, every class contains a bool initialize(...
0
votes
0answers
60 views

Concepting a Server - Handling Clients/Connections

I am writing the Server-Side of an Application, just for practicing my Java programming skills. I have made an attempt to program it, but I am not satisfied with my solution and I think it is because ...
2
votes
3answers
150 views

Shall I call this “Multitasking” in OOP?

I am very new to programming and have this humble OOP-related question: Can we have a module in a OOP-manner written program, that contains 2 or more OOP features? Say, both Encapsulation and ...
10
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3answers
315 views

How to manage single responsibility when the responsibility is shared?

I have base two classes, Operation and Trigger. Each has a number of subclasses which specialise in certain types of operations or triggers. A Trigger can trigger a specific Operation. Whilst an ...
1
vote
1answer
179 views

What is the DRY-est factory pattern to instantiate subtypes based on one of their properties' values?

Take the following class hierarchy: Client FacebookClient PinterestClient TwitterClient Each client must define a value for an enum property named ClientType (string property Url in the ...
3
votes
1answer
101 views

Snap to grid functionality in drawing application

I'm working on drawing application and I want to provide grid with snap to grid functionality. I'm trying to find the right way how to do that (ideally some design pattern), but I'm quite confused ...