`<-c` is the main routine waiting for the other goroutine to finish (`c <- true`). It's being blocked until there's something for it to receive. > It's also di

`<-c` is the main routine waiting for the other goroutine to finish (`c <- true`). It's being blocked until there's something for it to receive. > It's also difficult to tell in the for loop if v is being assigned as "range m", or if "k, v" are a tuple resulting from "range m" The `range` clause returns two values: index, and value at that index. It's really pretty easy to read and get used to once you actually read some documents.