What techniques for handling parallel tasks are implemented in Go?

In Go, techniques for handling parallel tasks include:

• Goroutines — lightweight threads started with the go keyword. They allow functions to run in parallel.

• Channels — mechanisms for communication between goroutines, enabling data transfer and synchronization.

• Select — a construct to wait on multiple channel operations, allowing to handle data from multiple sources.

• sync package — contains synchronization primitives like Mutex, WaitGroup, Once, which help manage access to shared resources and coordinate goroutine completion.

Example of launching a goroutine and passing data through a channel:

package main
import (
    "fmt"
)
func worker(ch chan string) {
    ch <- "done"
}
func main() {
    ch := make(chan string)
    go worker(ch)
    msg := <-ch
    fmt.Println(msg) // output: done
}