how to trim frimware version

[Harish KM]

Try below script:

var shrt_desc = "AP510C, HiveOS 10.5r4 build-278788 System OID: 1.3.6.1.4.1.26928.1";
var arr = shrt_desc.split(/\s+/); //split by one or more whitespace characters regex - \s+
gs.info(arr[2]);