Questions

1. Can you change the worker implementation so that the submitted work can be canceled by the caller?
2. Many languages offer frameworks with dynamically sized worker pools. Can you think of a way to implement that in Go? Would that worker pool be more performant than a fixed-sized worker pool that uses the same number of goroutines as the maximum for the dynamically sized one?
3. Try writing a generic fan-in/fan-out function (without ordering) that takes n input channels and m output channels.