Hands-On High Performance with Go

Selects

Selects are a construct that allow you to combine goroutines and channels in a meaningful way. We can multiplex Go functions in order to be able to execute a case that occurs when the goroutine is run. In our example, we create three separate channels: a string channel, a bool channel, and a rune channel. We next run some anonymous functions in the following code blocks in order to populate data in those channels, and use the select built-in to return values from the channels.

1. First, we initialize our package and set up three separate channels:

package main        import (    "fmt"    "time")         func main() {            // Make 3 channels    ch1 := make(chan string)    ch2 := make(chan bool)    ch3 := make(chan rune)

2. We next pass appropriate variables to each of ...