namesOf namesOf(Object): Array<String> Returns an array of strings with the names of all the keys within the given object. Introduced in DataWeave 2.3.0. Supported by Mule 4.3 and later. Parameters Name Description obj The object to evaluate. Example This example returns the keys from the key-value pairs within the input object. Source %dw 2.0 output application/json --- { "namesOf" : namesOf({ "a" : true, "b" : 1}) } Output { "namesOf" : ["a","b"] }