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AI-assisted engineering Working with AI Agents System design Core systems Data and AI systems Coding Coding problems Code review On-call SQL

Practice

Paths Concept guides

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Concept guides/Correctness review/Frontend bugs (React)

CodingCorrectness review

Frontend bugs (React)

Hard3 min read

Questions it teaches

Effect skips userId changeMedium20 min Array index as list keyMedium20 min Event listener not removedMedium18 min Concurrent checkout requestsMedium20 min Server client time mismatchMedium20 min React input loses external updatesMedium16 min Falsy zero renders nothingMedium16 min Timer runs on every messageMedium18 min

Related

Correctness review Arrays and strings Error handling Performance review Security review Reviewing AI code Concurrency

Builds on: Arrays and strings

Arrays & in-place tricks3 min Hash maps & sets3 min

Leads to: Error handling

Error handling & resilience3 min Blocking accept with no timeout4 min

Leads to: Performance review

Performance bugs3 min SQL query performance4 min

Leads to: Security review

Security vulnerabilities3 min Hardcoded secrets3 min

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