Practice · 2 of 3

Sortable Table Reducer

CHALLENGE

Difficulty: intermediate+25 XP

Write sortRows(rows, key, dir) that RETURNS rows sorted by key ("asc" or "desc", numbers and strings both supported) WITHOUT mutating the input, and nextSortDir(current) that cycles "asc" → "desc" → "asc". Stability: equal keys keep their original order.

Press Submit to check your solution.

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