Refactoring SHA dir: shorter

shadirconcurrent/main.go

@@ -24,12 +24,12 @@ func main() {
 		log.Fatalln("Usage shadir file")
 	}
 
-	var wg sync.WaitGroup
 	chan_hash, chan_path := make(chan string), make(chan string)
 
-	for i := 0; i < 100; i++ {
-		wg.Add(1)
-		go func() {
+	go func() { // 100 routines hashing
+		var wg sync.WaitGroup
+		for i := 0; i < 100; i++ {
+			wg.Add(1)
 			for path := range chan_path {
 				if h, err := sha256File(path); err != nil {
 					log.Print("Error "+path, err)
@@ -38,14 +38,12 @@ func main() {
 				}
 			}
 			wg.Done()
-		}()
-	}
-	go func() {
+		}
 		wg.Wait()
 		close(chan_hash)
 	}()
 
-	go func() {
+	go func() { // walk through files
 		filepath.Walk(os.Args[1], func(path string, info os.FileInfo, err error) error {
 			if err == nil && !info.IsDir() {
 				chan_path <- path