Glossary

DAG - Directed Acyclic Graph

Critical coding

SRP - Single Responsibilty Principle

A module, class, or function should only have a single responsibility.

Put alternatively, something obeying the SRP should only have one reason to change.

DRY - Don't repeat yourself

If you find yourself writing code to do the same thing many times then it's a very strong hint that you should abstract the repeated work.