subtree(users/wpcarro): docking briefcase at '24f5a642'

git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c
git-subtree-split: 24f5a642af
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789

users/wpcarro/go/actors.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+// Call function `f` in a go-routine, passing a reference to a newly created
+// channel, `c`, as its only argument. Return a reference to `c` to the caller
+// of `act`. When `f` halts, close the channel.
+func act(f func(chan interface{})) chan interface{} {
+	c := make(chan interface{})
+
+	go func() {
+		defer close(c)
+		f(c)
+	}()
+
+	return c
+}
+
+func prompt(msg string) string {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Print(msg)
+	text, _ := reader.ReadString('\n')
+	// TODO: Trim trailing newline from the rhs of text.
+	return text
+}
+
+func main() {
+	c := act(func(c chan interface{}) {
+		for {
+			x := <-c
+			fmt.Printf("[A] Received value: %v\n", x)
+
+		}
+	})
+
+	for {
+		x := prompt("[B] Enter a value: ")
+		c <- x
+	}
+	os.Exit(0)
+}