Recent questions tagged OOP

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I want a method to be executed every 5 minutes, I implemented whenever for ruby (cron). But it does not ... = false end @monitor_ping.save end See Question&Answers more detail:os...

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

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686 views

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oop - How to catch any method called on an object in python?

I'm looking for a pythonic solution on how to store a method which is called on an object right inside the ... a method. 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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736 views

1 answer

oop - Static Method of a Static Class vs. Static Method of a Non-Static Class ( C# )

I was asked the above question in an interview. Could you please explain the differences? ( performance - memory - ... ? ) Thank you, Erkan See Question&Answers more detail:os...

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

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794 views

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oop - Emulate super in javascript

Basically is there a good elegant mechanism to emulate super with syntax that is as simple as one of the ... and thus fails criteria 4. See Question&Answers more detail:os...

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

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928 views

1 answer

oop - Any PHP function that will strip properties of an object that are null?

I am returning a json_encode() of an array of objects pulled from an ORM. It includes lots of properties with a ... must be a more elegant way? See Question&Answers more detail:os...

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

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795 views

1 answer

oop - How can I require a method argument in Java to implement multiple interfaces?

It's legal to do this in Java: void spew(Appendable x) { x.append("Bleah! "); } How can I do this ( ... if (timeToClose()) xClose.close(); } See Question&Answers more detail:os...

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

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830 views

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oop - Default visibility of class methods in PHP

I looked at the manual, but I can't seem to find the answer. What is the default visibility in PHP for ... __construct(). Are they equivalent? See Question&Answers more detail:os...

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

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812 views

1 answer

oop - How to handle "duck typing" in Python?

I usually want to keep my code as generic as possible. I'm currently writing a simple library and being able ... to be as helpful as possible. See Question&Answers more detail:os...

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

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801 views

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oop - Why can't we instantiate an abstract class in Java?

I understand: Since an abstract class is nothing on its own, e.g. vehicle, we want to create an object of ... why does Java enforce these rules? See Question&Answers more detail:os...

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

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732 views

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oop - "Is a" vs "Has a" : which one is better?

Portfolio A → Fund 1 Portfolio A → Fund 2 Portfolio A → Fund 3 I couldn't frame my sentence without ... albeit with a small syntactical change. See Question&Answers more detail:os...

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

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794 views

1 answer

oop - Why would you declare an Interface and then instantiate an object with it in Java?

A friend and I are studying Java. We were looking at interfaces today and we got into a bit of an ... modeOfTransport objects? Does it matter? See Question&Answers more detail:os...

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

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847 views

1 answer

oop - Can an object automatically delete itself in javascript once it has achieved its purpose?

I am wondering if it is possible for an object in javascript to delete itself once it has finished its task. For ... not, is there another way? See Question&Answers more detail:os...

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

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761 views

1 answer

oop - Iterating over object instances of a given class in Python

Given a class that keeps a registry of its Objects: class Person(object): __registry = [] def __init__(self, ... how this would look like? See Question&Answers more detail:os...

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

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766 views

1 answer

oop - IoC, Where do you put the container?

I'm using castle windsor for a pet-project I'm working on. I'm starting to notice that I need to call ... into objects in a clean way. See Question&Answers more detail:os...

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

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814 views

1 answer

oop - Dynamically mixin a base class to an instance in Python

Is it possible to add a base class to an object instance (not a class!) at runtime? Something along the lines of ... > "Hello, my name is John" See Question&Answers more detail:os...

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

0 votes

732 views

1 answer

oop - Can you write any algorithm without an if statement?

This site tickled my sense of humour - http://www.antiifcampaign.com/ but can polymorphism work in every case ... would use an if statement? See Question&Answers more detail:os...

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

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755 views

1 answer

oop - What makes a language Object-Oriented?

Since debate without meaningful terms is meaningless, I figured I would point at the elephant in the room and ... -oriented languages and why? See Question&Answers more detail:os...

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

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965 views

1 answer

oop - PHP abstract properties

Is there any way to define abstract class properties in PHP? abstract class Foo_Abstract { abstract public $tablename; } ... = 'users'; } See Question&Answers more detail:os...

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

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716 views

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oop - Avoiding 'instanceof' in Java

I have the following (maybe common) problem and it absolutely puzzles me at the moment: There are a couple of ... problem? Thanks for any help! See Question&Answers more detail:os...

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

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849 views

1 answer

oop - What is the difference between dynamic dispatch and late binding in C++?

I've recently read about the Dynamic Dispatch on Wikipedia and couldn't understand the difference between dynamic ... the name refers to. See Question&Answers more detail:os...

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

0 votes

751 views

1 answer

oop - Closures: why are they so useful?

As an OO developer, maybe I have difficulty seeing its value. What added value do they give? Do they fit in an OO world? See Question&Answers more detail:os...

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

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682 views

1 answer

oop - JavaScript Classes

I understand basic JavaScript pseudo-classes: function Foo(bar) { this._bar = bar; } Foo.prototype.getBar = ... each with its own state) See Question&Answers more detail:os...

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

0 votes

727 views

1 answer

oop - Composition, Inheritance, and Aggregation in JavaScript

There is a lot of information about composition vs inheritance online, but I haven't found decent ... demonstrate composition and aggregation? See Question&Answers more detail:os...

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

0 votes

635 views

1 answer

oop - JavaScript: The Good Parts - How to not use `new` at all

Crockford's book, JavaScript: The Good Parts, says (on page 114) that constructor functions should always be ... with our own custom Objects? 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 - Aggregation vs Composition vs Association vs Direct Association

I am reviewing my knowledge in object-oriented programming. Under the relationship between classes topic, I have ... things out for me. See Question&Answers more detail:os...

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

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734 views

1 answer

oop - dynamic class names in php

I have a base class called field and classes that extend this class such as text, select, radio, checkbox, ... $field = new $$field_type(); See Question&Answers more detail:os...

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

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819 views

1 answer

oop - C++ inheritance, base methods hidden

I have a simple C++ base class, derived class example. // Base.hpp #pragma once class Base { public: virtual ... Derived pointer, or am I wrong? 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 - How to Access a static method in c#?

When we have a static method in a class it access only static members right and the static method can access only ... Console.ReadLine(); } } } See Question&Answers more detail:os...

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

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