Workspace

Dashboard Learn Handbook Labs Practice library Learning paths Review Insights Studios Mock interviews Notebook

Personal workspace · self-hosted

Search

Jump to a problem, path or page

Anti-patterns and refactoring · designlab

Dashboard Learn Handbook Labs Practice library Learning paths Review Insights Studios Mock interviews Notebook

Search

Jump to a problem, path or page

Part 5 · Module 10

Anti-patterns and refactoring

Recognize destructive architectural anti-patterns, diagnose code smells, avoid pattern mania, and safely refactor legacy code toward design patterns.

0 of 4 lessons24 min

10.1God objects and anemic modelsUp next6m
10.2Pattern overuse6m
10.3Code smells6m
10.4Refactoring toward a pattern step by step6m
LabAnti-Patterns and Refactoring: From Smells to Clean DesignFinish “Concurrency Patterns: Thread Pools, Queues, and Synchronization” first35m

Practice what this module teaches

Shopping Cart Domain LLDModel cart mutations, version checks and reproducible price quotes.Intermediate40 min Library Management LLDModel titles, physical copies, loans and reservations without double lending.Intermediate40 min Ticket Booking LLDReserve seats with expiring holds and reconcile payment without overselling.Advanced

50 min

Parking Lot LLDModel spots, tickets, and pricing with clear responsibilities and safe allocation.Foundation35 min