It would look like result = range(1, 3).concat(range 4, 6).map((x) -> x * x).filter (x) -> x % 2 is 0 or result = range 1, 3 result = result.conc

It would look like result = range(1, 3).concat(range 4, 6).map((x) -> x * x).filter (x) -> x % 2 is 0 or result = range 1, 3 result = result.concat range 4, 6 result = result.map (x) -> x * x result = result.filter (x) -> x % 2 is 0