From 45239efacc1735c0424db972c49f850692ead345 Mon Sep 17 00:00:00 2001
From: Dan Buch <dan@meatballhat.com>
Date: Tue, 23 Oct 2012 18:45:23 -0400
Subject: [PATCH] Playing with channels

---
 gotime/src/channels.go | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 gotime/src/channels.go

diff --git a/gotime/src/channels.go b/gotime/src/channels.go
new file mode 100644
index 0000000..0b9722a
--- /dev/null
+++ b/gotime/src/channels.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+    "fmt"
+    "time"
+    "math"
+)
+
+func sum(a []int, c chan int) {
+    sum := 0
+    for _, v := range a {
+        sum += v
+    }
+    to_sleep := time.Duration(100 * math.Abs(float64(sum))) * time.Millisecond
+    fmt.Printf("Sleeping %s...\n", to_sleep)
+    time.Sleep(to_sleep)
+    c <- sum
+}
+
+func main() {
+    a := []int{7, 2, 8, -9, 4, 0}
+
+    c := make(chan int)
+    go sum(a[:len(a)/2], c)
+    go sum(a[len(a)/2:], c)
+    x := <-c
+    fmt.Printf("x = %d\n", x)
+    y := <-c
+    fmt.Printf("y = %d\n", y)
+    fmt.Println(x, y, x + y)
+}