Yes, I have done this, but I was talking more about streams that I can splice, filter, map, join, pair, slice, window, buffer, groupby, scan, skip, take, switch

Yes, I have done this, but I was talking more about streams that I can splice, filter, map, join, pair, slice, window, buffer, groupby, scan, skip, take, switch, zip, reduce, etc. Not really possible without generics, lambdas and a good core of functional routines. Once you get used to this and the speed, productivity and elegance with which problems can be solved, using Golang feels a bit primitive and painful. The same Go code is usually 5x-10x longer.