javascript only: debugg the following code to pass specs. function findFirstNodes (root) {let stack(queue) = [root];//root. level = 0;const firsts = [];}while (stack.length != 0) {const curr = stack.pop();}if (!firsts [curr.level]) {| | firsts.push(curr.value);}if (curr.left) {}stack.shift(curr.left);return firsts; class TreeNode {constructor(value, left, right, level) {}}this.value = value;this. left = left;this.right = right;this.level = level// Given a tree, find the first (left-most) node at each// level of the tree and return it in an array, with the root at the// 0th index, and the left-most node in the deepest level of the tree// in the last index.//////////////////15/ \43/8712/ \492 4// Expected Output -> [ 5, 4, 1, 8, 2 ]

There are a few errors in the provided code. They are mentioned as follows: The stack variable is…

Answered: javascript only: debugg the following…

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javascript only: debugg the following code to pass specs.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Fundamentals of Javascript

JavaScript (or js) is a scripting language used to script (program) web pages. It is used to make the web page dynamic and interactive. JavaScript codes are written in a web page's hypertext markup language (HTML) code and run automatically when the page loads. JavaScript codes do not require any particular application (app) or software for compilation or execution.

Question

javascript only: debugg the following code to pass specs.

function findFirstNodes (root) {
let stack(queue) = [root];
//root. level = 0;
const firsts = [];
}
while (stack.length != 0) {
const curr = stack.pop();
}
if (!firsts [curr.level]) {
| | firsts.push(curr.value);
}
if (curr.left) {
}
stack.shift(curr.left);
return firsts;

class TreeNode {
constructor(value, left, right, level) {
}
}
this.value = value;
this. left = left;
this.right = right;
this.level = level
// Given a tree, find the first (left-most) node at each
// level of the tree and return it in an array, with the root at the
// 0th index, and the left-most node in the deepest level of the tree
// in the last index.
//
//
//
//
//
//
//
//
//
1
5
/ \
4
3
/
8
7
1
2
/ \
4
9
2 4
// Expected Output -> [ 5, 4, 1, 8, 2 ]

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