51CTO HarmonyOS Developer Community

Sep 4, 2026 · Mobile Development

HarmonyOS arktoolbox compact: Remove Falsy Array Values in One Line

This article introduces the compact utility from the arktoolbox library for HarmonyOS, which removes falsy values (null, undefined, 0, false, empty string, NaN) from arrays, explains its implementation, compares it with filter(Boolean), highlights edge cases like 0 being valid data, and demonstrates practical usage in forms, API aggregation, and caching.