sort by core interview pattern Pattern
1 problems
Pattern pages help build reusable solving frames. Identify signals first, then explain state, transition, and edge handling.
Recognition Signals
- Check if the candidate precomputes fn values to avoid repeated computation during sort.
- Ask how the solution handles objects or nested arrays where fn extracts numeric keys or indices.
Solve Flow
- 1. Define the active state/window.
- 2. Update state while preserving invariants.
- 3. Validate with edge-heavy examples.
Common Misses
- Calling fn multiple times during sorting can increase runtime unnecessarily.