Recent questions tagged design

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design patterns - Java: Lazy Initializing Singleton

The pattern to create singletons seems to be something like: public class Singleton { private static final ... locking pattern in java. See Question&Answers more detail:os...

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

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design patterns - How do I restrict object creation not more than 3 in Java class?

How do I restrict object creation not more than 3 in Java class? Can you give me an idea of how I can to 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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design patterns - Does the Single Responsibility Principle work in OOP?

I am struggling to understand how the Single Responsibility Principle can me made to work with OOP. If we are ... the point in the principle? See Question&Answers more detail:os...

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

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design patterns - Check for derived type (C++)

How do I check at runtime if an object is of type ClassA or of derived type ClassB? In one case I ... changing the existing class ClassA ? See Question&Answers more detail:os...

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

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design patterns - JavaScript Namespace

I want to create a global namespace for my application and in that namespace I want other namespaces: E.g. ... offer an alternative? 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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design patterns - Microservice architecture - carry message through services when order doesn't matter

Tl;dr: "How can I push a message through a bunch of asynchronous, unordered microservices and know when that ... fundamental design. Thank you. See Question&Answers more detail:os...

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

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design patterns - What's the difference between mixin() and extend() in Javascript libraries

I'm looking through various libraries, and seeing extend() pop up a lot, but I'm also seeing mixin() show ... extending an object? Thanks, Matt See Question&Answers more detail:os...

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

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design patterns - what reasons are there to use interfaces (Java EE or Spring and JPA)

Most of the J2EE(Spring and JPA) classes are designed with interfaces. Except for inheritance, are there any technical ... <User> get(){} } See Question&Answers more detail:os...

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

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design patterns - Objective-C switch using objects?

I'm doing some Objective-C programming that involves parsing an NSXmlDocument and populating an objects properties ... pattern in Objective-C See Question&Answers more detail:os...

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

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design patterns - How to do a PHP nested class or nested methods?

How can I do this in PHP $myDBClass->users()->limit(5);//output you limited users to 5 $myDBClass->comments()- ... where id > 3 limit 10" 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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design of python: why is assert a statement and not a function?

In Python, assert is a statement, and not a function. Was this a deliberate decision? Are there any ... which is arguably less pretty. See Question&Answers more detail:os...

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

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design patterns - Usage of local class in C++ function

I see some usage of internal struct in c++ function. There is a common interface IBase. Here is the ... some documents talking about 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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design patterns - How to use log4net with Dependency Injection

I'm trying to figure out what the right patter and usage of log4net is with a dependency injection framework. Log4Net ... (message, ex); } } See Question&Answers more detail:os...

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

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design patterns - Tips for writing fluent interfaces in C# 3

I'm after some good tips for fluent interfaces in C#. I'm just learning about it myself but keen to hear what ... , too. Thank you 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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design patterns - Façade vs. Mediator

I've been researching the difference between these two patterns. I understand that facade encapsulates access ... mediator add functionality? See Question&Answers more detail:os...