A template for declaring a type of object.

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4answers
259 views

Why I need to make method of my class private, If I need to access it throughout my application?

I am going through the beginners tutorial for C# from a website http://www.homeandlearn.co.uk/csharp/csharp_s10p1.html On chapter of classes, it makes the method of class private and then use ...
4
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1answer
93 views

Nested classes via a getter (to emulate namespacing)

So, we all know that ES6's introduced syntax is definitely sugar over what we've been doing, previously. That being said, we still don't have namespaces (which would be nice...) The problem that I'm ...
0
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1answer
59 views

Setting up folders and importing modules in Python

I'm building an app to automate some processes that are annoying to do by hand (looking in a file, taking certain information out of a file, building another file with that information). My project ...
1
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1answer
41 views

What's the best way to store class/type info in a plugin system in your software?

There are lots of applications like 3ds Max, Maya, etc that allows you to use plugins, where even the default nodes are created as plugins. This is all good but if the developer changes the ...
1
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2answers
217 views

Are any side effects not concrete side effects?

In Chapter 23 of "Object Oriented Software Construction" (1988), Betrand Meyer makes a distinction between side effects, concrete side effects, and abstract side effects. Meyer defines a side effect ...
0
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1answer
130 views

Best OOP practice for object vs dataservice [duplicate]

I am working on a new project and am curious as to how I should go about doing something properly. Lets say I have a table called "leads" in my database. This clearly means that a single "lead" would ...
0
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0answers
42 views

Internal class variables convention

When I see some open source projects, specifically classes, I see that its variables starts with a 'm' minuscule. What does it mean? What means the 'm'?
1
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0answers
64 views

Static properties and implicit “self” property in structures and enumerations vs classes in Swift

I am currently reading the Swift language documentation and came across these sentences in the chapter about methods: Similarly, type methods on structures and enumerations can access static ...
1
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5answers
375 views

Are there too many parameters in this constructor? [duplicate]

Check this out: public function __construct( \Magento\Framework\Model\Context $context, \Magento\Framework\View\DesignInterface $design, \Magento\Framework\Registry $registry, ...
0
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1answer
74 views

Is there a name for classes that only contain variables (and getters and setters)? [closed]

For example public class Student { private int id; private String firstName; private String lastName; /*getters, setters, constructors*/ } As opposed to public class Course { ...
1
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3answers
197 views

OOP implementation doubts with databases

I was starting a project today and after designing the database structure and how the data would be stored etc, I started the implementation. I am doing this on php, but the language isn't really ...
4
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2answers
242 views

Should I use properties for the properties of properties?

Sometimes I use some indirect properties to set or get some other sub-properties, I give an example class Page { public string MainText { set { MainParagraph.Text = value; } get { return ...
0
votes
1answer
102 views

Should I prefer classes or singletons in JavaScript/Node?

This question applies especially to Node.js, but also to JavaScript in general. I started working on a simple web app in Node.js. I'm relatively new to Node and JavaScript, and come mainly from C# ...
13
votes
4answers
894 views

“Use map instead of class to represent data” -Rich Hickey

In this video by Rich Hickey, the Clojure creator, he advises to use map to represent data instead of using a class to represent it, as done in Java. I don't understand how it can be better, since how ...
2
votes
1answer
99 views

When to use nested classes and when to use namespaces?

I have really never made use of namespaces, and am considering them at the moment. My situation. I have a class Reverb. It contains as members instances of other classes, declared in the same header ...
0
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1answer
53 views

Comments for a class that isn't an entity

According to Java's commenting conventions, classes comments should describe a "thing", rather than "actions". It is easy when the class IS a thing (ex. a Clown), but what if it isn't? In this case, ...
-1
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1answer
101 views

Why is it said that a class represents an abstraction? [closed]

I think that abstraction represents only the essential things needed for the purpose as there are so many unnecessary properties. So why is it said that a class represents an abstraction?
9
votes
5answers
2k views

class in OOP language and type

In programming language theory, a type is a set of values. E.g. the type "int" is the set of all integer values. In OOP languages, a class is a type, is it? When a class is defined with more than ...
1
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2answers
110 views

Class as resource handle & Bad Copy

I am reading Bjarne Stroustrup's book titled "A tour of C++". The following section is confusing to me: When a class is a resource handle – that is, when the class is responsible for an object ...
1
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1answer
91 views

Splitting single Class into multiple Classes

I am writing automated test scripts with Selenium Webdriver (Python) and I try to follow the correct programming practices, specifically the Object Oriented methodologies, where possible. At the ...
1
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1answer
157 views

How to represent “class” data type in C or any low level language? [closed]

I'm writing a simple language compiler,currently it's support functional programming only. I want to support OOP concept, but I don't know how exactly I can represent an object ? just where to start ...
4
votes
4answers
1k views

Refactoring: When to add a new class in the project?

When do you feel that you need a new class (maybe when you are developing or after development for refactoring purpose)? Maybe I can start from my existing variables and think how I can reorganize ...
1
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1answer
125 views

How to store/deal with data available to other classes

I'm writing a CAD program. Let's say I have in input class, this class reads various data from a text file and creates lots of lists/dictionaries and .... These data need to be accessed by other ...
1
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2answers
251 views

Is using multiple static classes with maximum one public method is a good idea

I'm writing a structural detailing (CAD) software for concrete buildings in C#. I have defined like hundreds of static classes each with one public method and if needed some private methods. Each one ...
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2answers
145 views

Confusion about associations in UML class diagram

--------------------- ---------------------- | FLIGHT | | STEWARD | --------------------- ---------------------- | Arrival time | | Steward ID | | ...
4
votes
2answers
192 views

In Python, is there any difference (apart from a few listed exceptions) between classes and dictionaries?

My logic goes like this: def A(val): return {'a':val} print(A(7)['a']) is the same as class A: def __init__(self, val): self.a = val print(A(7).a) Obviously, there are problems ...
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2answers
197 views

Will there be a memory or processing time difference between a class member function and a global function

I'm writing a neuron network simulation program and every operation or additional byte per neuron scales insanely. I prefer C++ as a language over the others, but now I'm wondering if the class ...
0
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1answer
77 views

Storing Form Data in a class

I have a form that writes to a database. Other than creating a class handle an external API, this project is done. However, the processing script is your standard procedural calling of queries using ...
1
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2answers
314 views

What is the purpose of creating a member function with the same type as its class?

I'm sure I'll botch some of the specific terminology, but what is the difference between object and object2 in this implementation? Is the only purpose of the first method (prototyping the class's ...
1
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2answers
266 views

Decide the type of an object during runtime

I try to implement a PriorityQueue with C#: public class PriorityQueue<T> : Heap<T> where T : IComparable<T> { ... } The Heap is abstract. I have MinHeap and MaxHeap that are ...
3
votes
6answers
1k views

Unit test private method in c++ using a friend class

I know that this is a debated practice, but let's suppose that this is the best option for me. I am wondering about what is the actual technique to do this. The approach that I see is this: 1) Make a ...
1
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2answers
271 views

When should I refactor a private class into a package-private class?

When I began implementing a class in my system (let's call it A), I realized I needed some kind of object that does something. So I needed a new class (let's call it B), but I made it a private static ...
0
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0answers
56 views

Is it good to make singleton Log classes for Entity classes [duplicate]

I am little confused about the technique i use in almost all applications i wrote ,i think i am going wrong I make Entity class Forexample Person, Adress ,Class and then to save it i make AdressLog ...
0
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0answers
43 views

c++ coding practice class vs. “free” functions [duplicate]

I am currently writing my first bigger project in c++. Its basic linear algebra. I am aware that boost libraries and others exist, but for various reasons I need to write my own. Purpose of the ...
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votes
2answers
217 views

Why friend in C++ should be in the header file? [closed]

Friend function/class, FriendOfX for some arbitrary class X is an implementation detail of class X. Why in C++ we have to declare them in the header file? Are there any compelling reasons to make this ...
2
votes
1answer
132 views

class hierarchy with structurally different subclasses

I want to implement a protocol layer which sits on top of the TCP/IP stack. There is a limited set of PDUs that can be sent and for each PDU there is a class which represents it in a structured form. ...
1
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2answers
93 views

How specific should be an interface about its implementation details?

Perhaps I should have picked a better title, but anyway... Basically what to do with two or more implementations that have the same public interface, but they are meant for slightly different ...
1
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2answers
2k views

A vector of pointers to different derived classes of the same base class

I am writing a game in C++ which has different enemy types. I have defined a base Enemy class and I also have derived classes enemy1, enemy2 etc. Now for updating these enemies in each iteration of ...
0
votes
2answers
342 views

Working with Javascript classes the right way

Comparable questions have surely been asked before but I'd like to hear some words about my specific way of implementing Javascript classes. Let me first start with a Javascript example taken from a ...
1
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1answer
111 views

Using class like an object in Python

I am learning from Learn Python the hard way where I have come across a study drill where they want to know that whether a class can be used like an object. As I have experimented: class A(object): ...
4
votes
7answers
753 views

Significant amount of the time, I can't think of a reason to have an object instead of a static class. Do objects have more benefits than I think? [closed]

I understand the concept of an object, and as a Java programmer I feel the OO paradigm comes rather naturally to me in practice. However recently I found myself thinking: Wait a second, what are ...
0
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2answers
2k views

Question about casting a class in Java with generics

In Java 6 Class<? extends ArrayList<?>> a = ArrayList.class; gives and error, but Class<? extends ArrayList<?>> b = (Class<? extends ...
2
votes
0answers
114 views

How to build child classes as parent configuration?

I'm using Codeigniter PHP Framework for developing a web application, and when developing an admin zone, I've ended building a generic parent class called AdminController which is extended by the ...
2
votes
2answers
380 views

MVC: “User” model gets big and crowded. Should methods that do CRUD operations on one-to-many relationship data be in different models?

In most MVC web projects there is a User class. Many times a user has something else in a one-to-many relationship, i.e. orders. If we have a user class that has many orders, should methods that add, ...
2
votes
1answer
251 views

UML class diagrams: How to show dependency

Please consider a program with four classes: Class A, B, C and D. Classes A and B are subclasses of abstract super-class C. Class D is dependent on C. Meaning: It holds a C objectOfTypeC field. As ...
26
votes
7answers
8k views

Why have private static methods?

I just wanted to clear up a question I have. What is the point of having a private static method as opposed to a normal method with private visibility? I would have thought an advantage to having a ...
2
votes
2answers
134 views

How to invoke a method in a class always when the class is accessed - like a reaction? [duplicate]

I am working on a C# net micro framework project, in particular an I2C bus class. I have several different I2C devices each defined in separate classes which contain all of the devices' unique ...
3
votes
2answers
8k views

Suggest a best practice to create Constants class

There is a debate in between my team members about declaration of Constants class. We are moving the constant variables into separate class as like below public class Contants { public const ...
2
votes
2answers
342 views

Should I always start with UML as a good practice when designing classes?

I am in the middle of creating a Bundle for PHP application based on Symfony 2. I want the bundle to be clear and good designed, so I constantly move and refactor code, rename methods, reorder ...
1
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5answers
235 views

Clarification about Polymorphism / Inheritance

I am trying to better my understanding of polymorphism. Say I have a base class called baseClass with one method called foo() and I have three derived classes called derived1 , derived2 and derived3 ...