There’s at least two things that one might conflate under the “Daily Coding Problem” rubric:
They’re related, as the book is a byproduct of the success of the email list. Both are deficient, but for different reasons
The Go programming language has a unique, built-in concurrency model that can make some processing much easier.
Have one goroutine do some (probably recursive) work. It puts results on a channel. The main goroutine reads results from the channel and possibly does some filtering on those results, like output unique values.
