Golang tour #69

sixnine.go

package main

import "tour/tree"
import "fmt"

// Walk walks the tree t sending all values
// from the tree to the channel ch.
func Walk(t *tree.Tree, ch chan int) {
	WalkRecursive(t, ch)
	close(ch)
}

func WalkRecursive(t *tree.Tree, ch chan int) {
	if t.Left != nil {
		WalkRecursive(t.Left, ch)
	}
	ch <- t.Value
	if t.Right != nil {
		WalkRecursive(t.Right, ch)
	}
}

// Same determines whether the trees
// t1 and t2 contain the same values.
func Same(t1, t2 *tree.Tree) bool {
	ch1 := make(chan int)
	ch2 := make(chan int)
	go Walk(t1, ch1)
	go Walk(t2, ch2)
	for x := range ch1 {
		y := <- ch2
		if x != y {
			return false
		}
	}
	return true
}

func main() {
	t1 := tree.New(1)
	t2 := tree.New(2)
	r := Same(t1, t2)
	fmt.Println(r)
}