SOLID Principles
The five SOLID principles applied to TypeScript and Python - Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.
- Difficulty
- intermediate
- Read time
- 1 min read
- Version
- v1.0.0
- Confidence
- established
- Last updated
Quick Reference
SOLID: S-Single Responsibility (one reason to change), O-Open/Closed (extend don't modify), L-Liskov Substitution (subtypes replaceable), I-Interface Segregation (small focused interfaces), D-Dependency Inversion (depend on abstractions). Apply to classes, modules, and functions. Prefer composition over inheritance.
Use When
- Designing class hierarchies
- Structuring modules and services
- Refactoring existing code
- Code review discussions
Skip When
- Simple scripts or utilities
- Prototyping (can refactor later)
SOLID Principles
The five SOLID principles applied to TypeScript and Python - Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.