go-design-pattern | golang design pattern go design pattern implementation | Architecture library

by mohuishou Go Version: v1.0.0 License: No License

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kandi X-RAY | go-design-pattern Summary

go-design-pattern is a Go library typically used in Architecture applications. go-design-pattern has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

golang design pattern go design pattern implementation, including 23 common design pattern implementations, and this is also a note on geek time - the beauty of design patterns

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go-design-pattern has a medium active ecosystem.

It has 1438 star(s) with 281 fork(s). There are 19 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 7 have been closed. On average issues are closed in 64 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of go-design-pattern is v1.0.0

Quality

go-design-pattern has no bugs reported.

Security

go-design-pattern has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

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go-design-pattern releases are available to install and integrate.

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Community Discussions

Trending Discussions on go-design-pattern

Singleton test not working when var is instantiated with *

what is the difference between pool and prototype patterns?

QUESTION

Singleton test not working when var is instantiated with *

Asked 2019-Jun-12 at 22:01

I'm following the Singleton design pattern as described in this book (https://github.com/PacktPublishing/Go-Design-Patterns/blob/master/Chapter02/main.go) and I have this code in file "singleton2.go":

...

ANSWER

Answered 2019-Jun-12 at 22:01

Follow the logic of your code and it's apparent where the problem is.

When you declare, but do not initialize the singleton (var instance *singleton) then instance is nil. Calling GetInstance evaluates instance == nil as true and returns a new *singleton every time it is called. That is why counter2 will never equal expectedCounter - each call to GetInstance is returning a new counter instance.

When you initialize the singleton instance (var instance = &singleton{}) then calls to GetInstance will return that singleton instance since it is not nil.

I imagine you'd want to modify GetInstance to something like this:

Source https://stackoverflow.com/questions/56534491

QUESTION

what is the difference between pool and prototype patterns?

Asked 2018-Jun-14 at 20:14

I've just read the chapter on Creational patterns in the book Design Patterns in golang. These are:

factory
abstract factory
prototype
singleton
builder

I've created a repository on github to list all of them. I've looked for other repositories like mine:

Some list object-pool as a pattern, others simple-factory and factory-method. Does there exist an official list of creational patterns in go? Is it important to know the list, or is it more important to know what is possible and be able to use right code in right context? With or without know all the patterns in the world?

And, ... what is the difference between prototype and object pool patterns? They look very similar to me.

...

ANSWER

Answered 2018-Jun-14 at 20:14

Design Patterns do not exist in isolation, they have relationships of their own. So for example, an object pool might use a factory or prototype to initially fill the pool or deal with exhaustion. The objects in that pool might conform to the command pattern, or be examples of the builder pattern.

In practice you cannot possibly know all the details of all patterns, the most important thing to know is the intent. What the pattern achieves. When using the pattern the remaining details can and should be taken from a pattern catalogue, over time you will learn some patterns comprehensively and reference others.

A Pattern Catalogue is the a collection of fully documented Design Patterns. The GoF Design Patterns book is probably the most famous Pattern Catalogue, however the book you mention and even github repositories can fulfil the same purpose.

Source https://stackoverflow.com/questions/46189914

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