hello-algo/en/codes/javascript/chapter_tree/binary_tree.js

/**
 * File: binary_tree.js
 * Created Time: 2022-12-04
 * Author: IsChristina (christinaxia77@foxmail.com)
 */

const { TreeNode } = require('../modules/TreeNode');
const { printTree } = require('../modules/PrintUtil');

/* Initialize the binary tree */
// Initialize the nodes
let n1 = new TreeNode(1),
    n2 = new TreeNode(2),
    n3 = new TreeNode(3),
    n4 = new TreeNode(4),
    n5 = new TreeNode(5);
// Set up references (pointers) between the nodes
n1.left = n2;
n1.right = n3;
n2.left = n4;
n2.right = n5;
console.log('\nInitialize the binary tree\n');
printTree(n1);

/* Insert and remove nodes */
const P = new TreeNode(0);
// Insert node P between n1 and n2 in n1 -> n2
n1.left = P;
P.left = n2;
console.log('\nAfter inserting node P:\n');
printTree(n1);
// Remove node P
n1.left = n2;
console.log('\nAfter removing node P:\n');
printTree(n1);