Solving Common Programming Issues

Is there a website that collects solutions to common programming scenarios. For example right now I am building a solution for payment gateways in my application, using factories, but I am not sure if there is a better, more established patterns for it.

I guess what I am asking if there is a place where design patterns are applied to these kind of real-world scenarios?

Both GitHub and stack overflow could be useful, but with so many different kind of informations and solutions, it becomes hard to find the "standard"