Recent questions tagged OOP

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oop - PHP Child class accessing Parent variable problem

I got this class: Class Username { protected $id; protected $username; protected $contact_information; private ... from Username? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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oop - Can I assign types to class properties in MATLAB?

I'm new to using MATLAB as an object-oriented environment and I'm writing my first class to describe a network ... there a way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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936 views

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oop - Observable in Java

I'm trying to understand the Observer and the Observable. Here's an example that I'm trying to figure out: ... I need this observer anyway? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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oop - PHP Multiple Inheritance with Interfaces

I'm trying to understand how using interfaces gives me multiple inheritance as I've been googling. class A { ... there something I'm missing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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994 views

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oop - Accessing PHP Class Constants

The PHP manual says Like static members, constant values can not be accessed from an instance of the object. ... inst; echo $inst::someconstant; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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oop - When should you use a local class in Java?

I just discovered local classes in Java: public final class LocalClassTest { public static void main(final String[ ... which should be avoided)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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917 views

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oop - Can inheritance be replaced completely by composition?

This question is NOT question like "inheritence vs composition". I understand completely how inheritance differs from ... "in MyCar class". See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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oop - Ruby Dynamic Classes. How to fix "warning: class variable access from toplevel"

I'm trying to write a program that dynamically defines ruby classes based on configuration read from a file. I know ... in `' Thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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964 views

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oop - Is Inheritance really needed?

I must confess I'm somewhat of an OOP skeptic. Bad pedagogical and laboral experiences with object orientation didn' ... inheritance to it... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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982 views

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oop - Difference between object and instance in python?

This happens in python2.7 I am working on the idea of meta class in python, almost all the tutorial refer object ... one should I use? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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oop - accessing fields of a class in Java

I am completely new to Java. I was practicing a code about a person eating some fruit. I have 3 classes ... . Please help me to understand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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995 views

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oop - Effective JavaScript: Making your Constructor Function new-agnostic

I've been reading 'Effective JavaScript' lately and I came across this question. The author explains how it' ... like the one above? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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oop - How to use Java comparator properly?

If I have the following class: public class Employee { private int empId; private String name; private int age; public ... , then age, then id? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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944 views

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oop - what is a member vs. a property

A friend who is new to OO programming asked me the difference between a Member and Property, and I was ashamed to ... can't explain it to him. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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oop - Association vs. Aggregation vs. Composition in Java

I'm trying to understand what these terms mean. And I came with few examples like: Aggregation : Facebook has a ... I'm missing the concept? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

oop - What are good reasons to use static methods in PHP?

Does anyone have any good examples of using static methods instead of dynamic? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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998 views

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oop - What is the difference between subtyping and inheritance in OO programming?

I could not find the main difference. And I am very confused when we could use inheritance and when ... in object-oriented programming? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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oop - How to access to the parent object in c#

I have a "meter" class. One property of "meter" is another class called "production". I need to access to a ... = new Production(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

oop - Is it possible to write strictly typed PHP code?

For example, is it possible to write code like this: int $x = 6; str $y = "hello world"; bool $z = false ... 555; //Or any numeric value } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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oop - Why can't you call abstract functions from abstract classes in PHP?

I've set up an abstract parent class, and a concrete class which extends it. Why can the parent class not call the ... () in foo.php on line 5 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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oop - Empty class object in Python

I'm teaching a Python class on object-oriented programming and as I'm brushing up on how to explain classes, ... there another way of doing it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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893 views

1 answer

oop - Java Instantiation

When an object is instantiated in Java, what is really going into memory? Are copies of parent constructors included? ... the JVM really do it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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971 views

1 answer

oop - Why do we need abstract classes in C++?

I've just learned about polymorphism in my OOP Class and I'm having a hard time understanding how abstract ... function in each actual class? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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866 views

1 answer

oop - JavaScript Inheritance with Prototypes -- 'constructor' property?

I've seen a lot of stuff like this, and am looking for the proper solution to basic JavaScript inheritance: ... well as the instanceof operator? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

oop - Speed of C# lists

Are C# lists fast? What are the good and bad sides of using lists to handle objects? Extensive use of lists ... "too many objects" for lists? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

oop - Call an overridden method in base class constructor in typescript

When I'm calling an overridden method from the base class constructor, I cannot get a value of a ... override functions in typescript. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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991 views

1 answer

oop - Inheritance vs enum properties in the domain model

I had a discussion at work regarding "Inheritance in domain model is complicating developers life". I'm an OO ... kind of situations? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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oop - Javascript calling public method from private one within same object

Can I call public method from within private one: var myObject = function() { var p = 'private var'; function ... here } }; } (); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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