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Lessons (10)

• SOLID at a Glance

  … One picture and one sentence per letter. The big idea SOLID is a set of five principles collected …

• O — Open/Closed Principle

  … new behaviour is plugged in, the core stays untouched](/img/solid/ocp-plugins.svg) With classes and TypeScript …

• S — Single Responsibility Principle

  … split a class by who asks for changes](/img/solid/srp-split.svg) A frontend example SRP applies …

• I — Interface Segregation Principle

  … one giant remote vs small remotes that each do one thing](/img/solid/isp-remotes.svg) 📘 ISP: "Clients …

• D — Dependency Inversion Principle

  … the lamp and the power plant both depend on the socket standard](/img/solid/dip-socket.svg) 📘 DIP …

• L — Liskov Substitution Principle

  … changing height also changes width](/img/solid/lsp-square.svg) Square broke a promise that Rectangle made: "setting …

• Code Smells & Refactoring

  … is the Open/Closed Principle , covered in the SOLID lessons.) Shotgun surgery vs Divergent change mermaid flowchart TB …

• SQL vs NoSQL Databases

  … It's relational, rock solid, and it also handles JSON ( jsonb ), full-text search and geospatial data. Add …

• Normalization & Denormalization

  … For normal application schemas, reaching solid 3NF plus explicit constraints is usually the practical goal. Use BCNF when …

• Clean Architecture in Depth

  … That's Dependency Inversion (the D in SOLID) at architecture scale. mermaid flowchart LR subgraph Core["Application core …