Get All Rooms that Contain Parameter Value of

[evargas7QQQV]

I want to generate a new list of room elements based on them having their room parameter ‘Department’ set. In this example, one room is set to Corridor and the other Storage.

[Nick_Boyts]

Sounds like you just want to filter the rooms based on having a value. You can do that with FilterByBoolMask and a conditional test.

[bvs1982]

Or GroupByKey.

[_Vijay]

or List.GroupByFunction