Code should be...

• Code readability - code that is easy to read by others
• Code maintainability - code that is easy to modify or extend by others
• Code reliability - code that runs without failure
• Code testability - code that can be measured and observed during development

Good, Cheap, Fast [Link]

• Good user experience
• Cheap maintenance
• Fast performance

SOLID Principles

• S — Single-responsiblity principle
• O — Open-closed principle In short, inheritance fulfils the second principle.
• L — Liskov substitution principle can more easily be switched out with either implementation.
• I — Interface segregation principle Make small client specific interfaces
• D — Dependency Inversion Principle

https://itnext.io/brutally-solid-typescript-ba745585f440

Pair Programming