React state mutation no re-render
An AI generated this todo-toggle handler. Clicking a checkbox updates the data but the row's checkmark never re-renders. What's wrong?
Implement
toggle_todo_done(todo_lines: list[str], target_id: str) → list[str]Examples
in
[["t1:open","t2:done"],"t1"]out["t1:done","t2:done"]in
[["t1:open","t2:done"],"t2"]out["t1:open","t2:open"]in
[["t1:open"],"zz"]out["t1:open"]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.
0:00 of about 15 min
Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.