Make me cool example go program

README.md

Download and install go

Create a folder for the main.go file

Put main.go there && cd there

go build -o coolmaker

./coolmaker name1 name2

or alternatively just go run main.go name1 name2

main.go

package main

import (
	"fmt"
	"os"
	"strings"
	"time"
)

func coolMaker(s string, coolChannel chan string) {
	time.Sleep(time.Millisecond * time.Duration((100 * len(s))))
	coolChannel <- s + " is 🆒!"
}

func createCoolPeople(makeCool []string) chan string {
	coolChannel := make(chan string, 2)
	for _, cool := range makeCool {
		go coolMaker(cool, coolChannel)
	}
	return coolChannel
}

func sumCoolPeople(coolChannel chan string, allTheCoolPeople chan []string, numberOfPeople int) {
	var coolPeople []string
	for message := range coolChannel {
		coolPeople = append(coolPeople, message)
		if len(coolPeople) == numberOfPeople {
			close(coolChannel)
		}
	}
	allTheCoolPeople <- coolPeople
}

func main() {
	makeCool := os.Args[1:]
	allTheCoolPeople := make(chan []string)
	coolChannel := createCoolPeople(makeCool)
	go sumCoolPeople(coolChannel, allTheCoolPeople, len(makeCool))
	result := <-allTheCoolPeople
	fmt.Println(strings.Join(result, "\n"))
}