Array operators will work with all versions of all client SDKs except on device eval client SDKs.For on device eval SDKs below are the supported SDKs and minimum versionsjs-on-device-eval-client - v3.5.1
Array operators require certain SDK versions to work in server SDKsNode.js - v5.27.0Node Lite - v0.4.0Python - v0.42.0Ruby - v2.1.0Java/Kotlin Server - v1.26.0PHP - v3.5.0Go - v1.31.0 (only supports type []interface).Net Server - v2.1.0All of the new Server Core SDKs support array operators in all versions