Differences

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--- cs_lang:go [2012/04/21 09:00] – cedric
+++ cs_lang:go [2012/04/30 09:24] – cedric
@@ Line 9: / Line 9: @@
 <code go>
 package main
 import "fmt"
 func sum(a []int, c chan int) {
     sum := 0
@@ Line 18: / Line 19: @@
     c <- sum  // send sum to c
 }
 func main() {
     a := []int{7, 2, 8, -9, 4, 0}
-        c := make(chan int)
+    c := make(chan int)
     go sum(a[:len(a)/2], c)
     go sum(a[len(a)/2:], c)
-        x, y := <-c, <-c  // receive from c
+    x, y := <-c, <-c
     fmt.Println(x, y, x + y)
 }
-</go>
+</code>
+===== Producer-consumer problem =====
+<code go>
+package main
+import ("fmt")
+var done = make(chan bool)
+var cake = make(chan int)
+func produce (firstname string) {
+    for i := 0; i < 10; i++ {
+        fmt.Printf("%s make cake %d\n", firstname, i)
+        cake <- i
+    }
+    done <- true
+}
+func consume (firstname string) {
+    for {
+      cake_number := <-cake
+      fmt.Printf("%s eat cake %d\n", firstname, cake_number)
+   }
+}
+func main () {
+   go produce("Alice")
+   go consume("Bob")
+   go consume("Maxime")
+   <- done
+}
+</code>
+===== Fork bomb =====
+<code go>
+package main
+import "fmt"
+func main() {
+    c := make(chan bool)
+    go func() {
+        count := 0
+        for <- c {
+            count++
+            fmt.Println(count)
+        }
+    }()
+    bomb(c)
+}
+func bomb(tick chan bool) {
+    for {
+        tick <- true
+        go bomb(tick)
+    }
+}
+</code>