generate random single values

[Abenezer]

How do you add random single values example employees : { Type : ['Temporary','Permanent'], age : [random(20,45)] } so that the output would be something like employees: [ { Type: Temporary, age : 25 }, { Type: Permanent, age : 33 }, ]

if this is no available consider it as feature request.. to run custom functions before generating individual tuples