concurrency.md

Concurrency

• There's a section in the Little Go Book.
  • I haven't reviewed it yet.
• https://github.com/golang/go/wiki/LearnConcurrency
  • I haven't reviewed it yet.

Tour

• https://tour.golang.org/list
• I did this; notes below.

1. Goroutines invoked by go f()

2. Channels ch := make(chan int) Now you can ch <- 123 and <-ch.

3. Can give an argument to decide how much to buffer

4. Can close(ch) when done. Then someone else can range over it. Only needed if someone is ranging; otherwise it's unnecessary to close. You can check if val, ok := <-ch if needed

5. select:

   select { case c <- 123: fmt.Println("Sent value!") case <-quit: fmt.Println("Someone sent us a value to quit!") }

6. You can use a default case to be non-blocking.

7. They show us how to use sync.Mutex which is simple.