Go Exercise: Equivalent Binary Trees

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

package mainimport (    "fmt"    "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) {    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)    for i:=0; i<10; i++ {        if <-ch1 != <-ch2 {            return false        }    }    return true}   func main() {    ch := make(chan int)    go Walk(tree.New(1), ch)    for i:=0; i<10; i++ {        fmt.Println(<-ch)    }    fmt.Println("Equivalent Binary Trees?",        Same(tree.New(1), tree.New(1)))    fmt.Println("Equivalent Binary Trees?",        Same(tree.New(1), tree.New(2)))}

1. Implement the Walk function.

2. Test the Walk function.

The function tree.New(k) constructs a randomly-structured binary tree holding the values k, 2k, 3k, ..., 10k.

Create a new channel ch and kick off the walker:

go Walk(tree.New(1), ch)

Then read and print 10 values from the channel. It should be the numbers 1, 2, 3, ..., 10.

3. Implement the Same function using Walk to determine whether t1 andt2 store the same values.

4. Test the Same function.

Same(tree.New(1), tree.New(1)) should return true, andSame(tree.New(1), tree.New(2)) should return false.

[寫完這個小練習，basic部分暫時完成，順便給go tour提交了一個commit]