Parallel, but not unlimited in RxJS
RxJS interview exercise on Flattening, difficulty 3 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write uploadSome(files$, upload, limit): like uploadAll, but never more than `limit` uploads at a time; further files wait for a free slot, in arrival order.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.