Recent questions tagged OOP

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oop - PHP - Implement logging mechanism to file in several classes

I would like to implement logging mechanism to file in PHP: log file path will be in config file config.php ... $instance_b = new B($logger); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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698 views

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oop - Calling one prototype method inside another in javascript

var Ob = function(){ } Ob.prototype.add = function(){ inc() } Ob.prototype.inc = function(){ alert(' Inc ... inner function. how do i do that ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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847 views

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oop - Is Multiple Inheritance allowed at class level in PHP?

Is Multiple Inheritance allowed at class level in PHP? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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717 views

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oop - Why can't a Java class be declared as static?

I am trying to find why the class cant be created as a static? Like: public static class Qwert{ public static void main( ... is : "+ x); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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807 views

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oop - How to set javascript private variables in constructor?

Say I have a javascript function/class called Foo and it has a property called bar. I want the value of ... to all internal functions of foo? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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602 views

1 answer

oop - OO Javascript : Definitive explanation of variable scope

Can someone provide an explanation of variable scope in JS as it applies to objects, functions and closures? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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736 views

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oop - C++ virtual table layout of MI(multiple inheritance)

Look at the following C++ code class Base1 { public: Base1(); virtual ~Base1(); virtual void speakClearly(); ... someone tell me why? Thx. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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564 views

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oop - Should Enterprise Java entities be dumb?

In our legacy Java EE application, there are loads of value object (VO) classes which typically contain only ... concerns to take into account? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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947 views

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oop - Python - Testing an abstract base class

I am looking for ways / best practices on testing methods defined in an abstract base class. One thing I ... bar without doing any subclassing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

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oop - Why avoid subtyping?

I have seen many people in the Scala community advise on avoiding subtyping "like a plague". What are the ... ? What are the alternatives? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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872 views

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oop - Should you ever use protected member variables?

Should you ever use protected member variables? What are the the advantages and what issues can this cause? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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611 views

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oop - When to use a Class in VBA?

When is it appropriate to use a class in Visual Basic for Applications (VBA)? I'm assuming the accelerated ... is there a specific criterion? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

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oop - What is the meaning and reasoning behind the Open/Closed Principle?

The Open/Closed Principle states that software entities (classes, modules, etc.) should be open for extension, ... good object-oriented design? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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665 views

1 answer

oop - Coupling, Cohesion and the Law of Demeter

The Law of Demeter indicates that you should only speak to objects that you know about directly. That is, do not ... use to make that decision? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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887 views

1 answer

oop - Differences between Proxy and Decorator Pattern

Can you give any good explanation what is the difference between Proxy and Decorator? The main difference I ... create Proxy with aggregation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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712 views

1 answer

oop - What is polymorphism in Javascript?

I have read some possible article I could found on the internet on polymorphism. But I think I could not ... (person); showInfo(employee); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

881 views

1 answer

oop - How do I create an abstract base class in JavaScript?

Is it possible to simulate abstract base class in JavaScript? What is the most elegant way to do it? Say, I ... should output: 'bark', 'meow' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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766 views

1 answer

oop - Difference between Encapsulation and Abstraction

I had an interview today. I had a question from OOP, about the difference between Encapsulation & Abstraction? I ... it with a simplest example? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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881 views

1 answer

oop - C++ Double Dispatch for Equals()

Imagine I have abstract base class Shape, with derived classes Circle and Rectangle. class Shape {}; class Circle : ... well enough to know why. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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886 views

1 answer

oop - Access subclass fields from a base class in Java

I have a base class called Geometry from which there exists a subclass Sphere: public class Geometry { String ... ? Thanks in advance :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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925 views

1 answer

oop - Java: Overriding static variable of parent class?

I have the following class which I'm using as the base of all the models in my project: public abstract class ... of the User class as well? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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865 views

1 answer

oop - Difference between value parameter and reference parameter?

Difference between value parameter and reference parameter ? This question is asked sometime by interviewers during my ... same thing ? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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953 views

1 answer

oop - What does slicing mean in C++?

It is mentioned in C++ FAQ site -- "larger derived class objects get sliced when passed by value as a ... C++ as my development environment. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

757 views

1 answer

oop - Are Java classes objects?

I've read before that Java classes are instances of the class Class. But now, my computer science teacher says ... not objects. Which is true? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

789 views

1 answer

oop - Why there is no local static variable in Java?

In C/C++ we use static local variables for maintaining a method's state. But why it is not supported in ... maintaining only one method's state? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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716 views

1 answer

oop - How to create a "single dispatch, object-oriented Class" in julia that behaves like a standard Java Class with public / private fields and methods

I read in a book that "you can't create traditional 'classes' in julia with single-dispatch-style ... where this might fail spectacularly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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894 views

1 answer

oop - Is global constants an anti-pattern?

I've always thought having a class just for the sake of holding constants is a bad design. But recently, I've ... . What do other people think? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

749 views

1 answer

oop - Java Enums: Two enum types, each containing references to each other?

Is there a way to get around the class-loading issues caused by having two enums that reference each other? I ... -versa.) Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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