June 2018 Update

Task/Concurrent-computing/Go/concurrent-computing-1.go

@@ -2,19 +2,20 @@ package main
 
 import (
     "fmt"
-    "math/rand"
+    "golang.org/x/exp/rand"
     "time"
 )
 
 func main() {
     words := []string{"Enjoy", "Rosetta", "Code"}
-    rand.Seed(time.Now().UnixNano())
+    seed := uint64(time.Now().UnixNano())
     q := make(chan string)
-    for _, w := range words {
-        go func(w string) {
-            time.Sleep(time.Duration(rand.Int63n(1e9)))
+    for i, w := range words {
+        go func(w string, seed uint64) {
+            r := rand.New(rand.NewSource(seed))
+            time.Sleep(time.Duration(r.Int63n(1e9)))
             q <- w
-        }(w)
+        }(w, seed+uint64(i))
     }
     for i := 0; i < len(words); i++ {
         fmt.Println(<-q)