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Lessons (10)

• D — Dependency Inversion Principle

  … Dependency Injection DIP is the principle; Dependency Injection (DI) is the most common technique to achieve it: pass …

• Clean Architecture

  … one application action js // application/RegisterUser.js export class RegisterUser { // Dependencies are injected: only "shapes" (interfaces), never concrete …

• Authentication, Authorization & API Security

  … Authorize every request. - Parameterised queries stop injection.

• Creational Patterns: How to Make Objects

  … Prefer creating one instance in your composition root and injecting it (see Dependency Inversion ). --- Cheat sheet Pattern One …

• Frontend Security

  … Even if an attacker injects a <script , the browser refuses to run it. http Content-Security-Policy: default …

• SOLID at a Glance

  … microwave's buttons. D Dependency Inversion Depend on abstractions , not concrete details. Lamps depend on the socket, not …

• Backend Languages: Node.js, Go, Python & Rust

  … NestJS (structured, TypeScript-first) NestJS adds modules, dependency injection and decorators on top of Express/Fastify, similar to …

• Which Pattern Do I Need?

  … first Singleton abuse Global state everywhere, flaky tests Dependency injection God object One class that knows and does …

• React vs Vue vs Angular

  … tracked dependencies"] V1[ref changes] -- V2["Proxy knows exactly<br/ which parts use it"] -- V3[update only those …

• Resilience Patterns

  … Mesh, Gremlin and AWS Fault Injection Service. Key takeaways - Assume every dependency will fail or slow down. - Timeouts …