"Comparison-free sorting of positive integers" aka "Sleepsort" in Go, using Goroutines

sleepsort.go

package main

import (
    "fmt"
    "os"
    "sync"
    "time"
    "strconv"
)

func main() {
    args := os.Args

    var wg sync.WaitGroup
    for _, arg := range args[1:] {
        wg.Add(1)   // Add a wait group for each of the arguments
        n, _ := strconv.Atoi(arg)
        go func(n int) {
            defer wg.Done()
            time.Sleep(time.Duration(n) * time.Second)
            fmt.Println(n)
        }(n)
    }
    wg.Wait()       // Wait for all goroutines to finish before continuing
}