Creational and structural patterns
Comes up in: Low-level design
This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.
What it covers
- factory, builder, singleton (and module singletons' testing problems)
- adapter, facade, decorator, proxy
- examples in real libraries
Words you will know
What you will practise
- adapter for two payment SDKs
Interview questions this answers
- What problems do singletons cause?