this post was submitted on 12 Apr 2024
801 points (98.8% liked)
Programmer Humor
19623 readers
1 users here now
Welcome to Programmer Humor!
This is a place where you can post jokes, memes, humor, etc. related to programming!
For sharing awful code theres also Programming Horror.
Rules
- Keep content in english
- No advertisements
- Posts must be related to programming or programmer topics
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Why do you have access to my project??
... And can you fix it?
https://gist.github.com/thom-nic/2c74ed4075569da0f80b
Okay, here we go. I'm going to spit out some bullshit and home someone corrects me if I'm wrong. I've looked for some explanations and this is what I've gotten.
Are you ready?
The Factory Pattern.
My understanding is that the purpose is a function to return any of several types of objects, but a specific type, not just an interface or whatever they might all inherit from.
I think most languages now have something like a "dynamic" keyword to solve this issue by allowing determination of the type only at runtime. (To be used with extreme caution.)
But most of the time I see the Factory pattern, it's used unnecessarily and can only return one specific type. Why they would use a Factory pattern here and not just a plain old constructor confounds me.
Am I off base?
Factory pattern can return a mock type for testing or a production type, as needed, which makes it possible to unit test the code that uses the produced object.
This quick guide explains it well. Then it improves on it by explaining dependency injection.
https://github.com/google/guice/wiki/Motivation
Yeah most uses of the factory pattern are unnecessary and it's mild code smell IMO. If your factory only returns one type you should definitely just use that type's constructor.