public/subjects/btreeapplypreorder

btreeapplypreorder

Instructions

Write a function that applies a given function f to each element in the tree using a preorder walk.

Notions

• Tree Traversal

Expected function

func BTreeApplyPreorder(root *TreeNode, f func(...interface{}) (int, error)) {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	"piscine"
)

func main() {
	root := &piscine.TreeNode{Data: "4"}
	piscine.BTreeInsertData(root, "1")
	piscine.BTreeInsertData(root, "7")
	piscine.BTreeInsertData(root, "5")
	piscine.BTreeApplyPreorder(root, fmt.Println)

}

And its output :

$ go run .
4
1
7
5
$