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Mastering Concurrency in Go

Solution Review: Buzz Game

Explore how to use Go's select statement to unblock channel receiving operations in concurrent programs. Understand this practical solution to avoid blocking by choosing ready channels, enhancing your grasp of Go's concurrency features.

We'll cover the following...
Go (1.6.2)
package main
import (
  "fmt"
  "time"
  "math/rand"
)
func main() {
  channel1 := make(chan string)
  channel2 := make(chan string)
  go func() {
    rand.Seed(time.Now().UnixNano())
    time.Sleep(time.Duration(rand.Intn(500)+500) * time.Millisecond)
    channel1 <- "Player 1 Buzzed"
  }()
  go func() {
     rand.Seed(time.Now().UnixNano())
     time.Sleep(time.Duration(rand.Intn(500)+500) * time.Millisecond)
     channel2 <- "Player 2 Buzzed"
  }()
  for i := 0; i < 2; i++ {
    select{
      case message1 := <-channel1:
        fmt.Println(message1)
      case message2 := <-channel2:
        fmt.Println(message2)
    }
  }
}

You can see that we unblocked the channel receiving operations by using a select statement (lines 25-30). Yes, it was that simple!

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