go-tour-70.go

package main

import "fmt"
import "tour/tree"

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

func _Walk(t *tree.Tree, ch chan int) {
	if t.Left != nil {
		_Walk(t.Left, ch)
	}
	ch <- t.Value
	if t.Right != nil {
		_Walk(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)
	v1 := <- ch1
	v2 := <- ch2
	return v1 == v2
}

func main() {
	ch := make(chan int)
	go Walk(tree.New(1), ch)
	for i := range ch {
		fmt.Println(i)
	}
	fmt.Println(Same(tree.New(1), tree.New(1)))
	fmt.Println(Same(tree.New(1), tree.New(2)))
}