Code reviewMediumcr-g302

Subject PerformanceLevel Mid–Senior~18 minCommon in Code quality & review interviewsIndustries Software development, IT services

Question

Review this JavaScript function that returns tickets not yet seen, given an array of already-seen ids. Both arrays can be large.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

Learn the concepts

Talk through your review

Code to reviewjavascript

1function unseenTickets(tickets, seenIds) {2    return tickets.filter(t => !seenIds.includes(t.id));3}

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