simple_cli_app.go

package main

import "fmt"

func newProducer(products ...string) <-chan string {
	results := make(chan string)
	go func() {
		defer close(results)
		for _, product := range products {
			results <- product
		}
	}()
	return results
}

func main() {
	for result := range newProducer("A", "B", "C", "E", "F", "G") {
		fmt.Println(result)
	}
}