When is a good time to use a function or a method? Here is a list of reasons when you should use them.
A design pattern that allows you to make sure there is only one instance of a class. This is uber-important for fast and efficient code. You no longer have to worry if you created an instance somewhere that wasn’t cleaned up afterward (i.e database connections). Big time stress relief. If you have never used a design pattern or don’t know what one is you can check out this previous article that can walk you through it.
Are you not sure how to structure your code? Have you come across a problem that makes life difficult. Odds are many developers have been in your situation before. Design patterns are the antacid of the development world…finally relief.