closure-free simple walk

exercises/08-ebt/go.go

@@ -4,22 +4,18 @@ import (
 	"code.google.com/p/go-tour/tree"
 	"fmt"
 )
+func walk(t *tree.Tree, ch chan int) {
+    if t != nil {
+    walk(t.Left, ch)
+    ch <- t.Value
+    walk(t.Right, ch)
+    }
+}
 
 // Walk walks the tree t sending all values
 // from the tree to the channel ch.
 func Walk(t *tree.Tree, ch chan int) {
-    // do it as a nested closure so that I can control the call to close so 
-    // that I can use the range-based forloop in main.main
-	var walk func(t *tree.Tree)
-	walk = func(t *tree.Tree) {
-		if t == nil {
-			return
-		}
-		walk(t.Left)
-		ch <- t.Value
-		walk(t.Right)
-	}
-	walk(t)
+	walk(t, ch)
 	close(ch)
 }