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Vibe codingHardvc-g039
Subject Ai code reviewLevel Senior~17 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

You asked an AI assistant for a Go function that truncates a user bio to 20 characters with an ellipsis, for a profile preview. It produced:

go
func preview(bio string) string {    if len(bio) <= 20 {        return bio    }    return bio[:20] + "\u2026"}

It looks right on ASCII bios. What input corrupts the output, and what's the real fix?

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts
Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.