What is preventing the removal of the zeros during the process of combining a sorted array?

Question

What is preventing the removal of the zeros during the process of combining a sorted array?

I've been tackling this challenge:

Below you'll find the code I've come up with so far:


/**
 Do not return anything, modify nums1 in-place instead.
 */
function merge(nums1, m, nums2, n) {
    nums2.forEach(i => {
        if (i > 0) {
            nums1.push(i)
        }

    })

    nums1.sort()


    for (let i = 0; i < nums1.length; i++) {
        if (nums1[i] == 0) {
            nums1.splice(i, 1)
        }
    }
};

This is the input ([1,2,3,0,0,0], 3, [2,5,6], 3)

The output I'm getting is: [0,1,2,2,3,5,6]

However, I expected it to be: [1,2,2,3,5,6]

Any insights on why this might be happening?

Thank you in advance!

javascript typescript array-merge

Answer 1

Answer №1

You are iterating through an array and accessing the index of the original array, but changes are being made to the array itself.

For example, if you begin with [0,0,0,1,2,2,3,5,6], and then remove at index 0, you will have [0,0,1,2,2,3,5,6]. When i=1, you attempt to remove at index 1 resulting in [0,(here=>)0,1,2,2,3,5,6] and ending up with [0,1,2,2,3,5,6]. Additional indexing shows no more zeros.

To avoid this issue, I recommend using a reduce or map function to create a new array while keeping the original intact for indexing purposes.

Answer 2

You are iterating through an array and accessing the index of the original array, but changes are being made to the array itself.

For example, if you begin with [0,0,0,1,2,2,3,5,6], and then remove at index 0, you will have [0,0,1,2,2,3,5,6]. When i=1, you attempt to remove at index 1 resulting in [0,(here=>)0,1,2,2,3,5,6] and ending up with [0,1,2,2,3,5,6]. Additional indexing shows no more zeros.

To avoid this issue, I recommend using a reduce or map function to create a new array while keeping the original intact for indexing purposes.

Answer 3

Answer №2

The issue in your code arises from altering the length of the nums1 array using the splice method while looping over it with its initial length. This results in skipped indexes. To resolve this problem, you can add i-- after splicing the array.

function mergeArrays(nums1, m, nums2, n) {
    nums2.forEach((num) => {
        if (num > 0) {
            nums1.push(num);
        }
    });

    nums1.sort();

    for (let i = 0; i < nums1.length; i++) {
        if (nums1[i] == 0) {
            nums1.splice(i, 1);
            i--;
        }
    }
}

Answer 4

The issue in your code arises from altering the length of the nums1 array using the splice method while looping over it with its initial length. This results in skipped indexes. To resolve this problem, you can add i-- after splicing the array.

function mergeArrays(nums1, m, nums2, n) {
    nums2.forEach((num) => {
        if (num > 0) {
            nums1.push(num);
        }
    });

    nums1.sort();

    for (let i = 0; i < nums1.length; i++) {
        if (nums1[i] == 0) {
            nums1.splice(i, 1);
            i--;
        }
    }
}

What is preventing the removal of the zeros during the process of combining a sorted array?

Answer №1

Answer №2

Similar questions

Transform the structure of the JSON data object

Using JavaScript regex to substitute white spaces and other characters

Troubleshooting: Node.js with Express - Issue with Loading Static JavaScript File in HTML

Is there a way to make the checkbox and corresponding text display on a single line within my code snippet?

Creating a dynamic number of properties with different names in Typescript can be achieved by using a loop

In Angular 4, you can easily preselect multiple options in a mat-select dropdown by passing an

The setState function in the useState hook is being called only one time when triggered by an EventListener

When iterating through it, a sorted array in Javascript mutates the window object, but not in any

Organize pictures and resize them to fit within a specific space

Guide on utilizing JavascriptExecutor in Selenium for inserting text into a concealed text field with an unknown ID

Add letters to the input field as soon as typing begins without the need to first click on the input field when

Retrieve file server domain using JavaScript or jQuery

Conflicts arise when trying to create several objects with different material types in ThreeJS within the

Click on the div and any elements it contains in the CSS and JavaScript

Title remains consistent | Angular 4

Issue with AngularJS: Click event does not trigger compilation of variable in $compile element

Identify when the user ceases typing in Angular 2

Put a cookie in place to deter users from returning to the website

Right-align SELECT-OPTIONS text

Invoking a URL handler with JavaScript