Day 4: Count Objects in JavaScript | 10 Days Of JavaScript Solutions | HackerRank Programming Solutions [💯Correct]

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In this post, you will find the solution for Day 4: Count Objects in JavaScript-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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Introduction To JavaScript

JavaScript is a lightweight, cross-platform, and interpreted scripting language. It is well-known for the development of web pages, many non-browser environments also use it. JavaScript can be used for Client-side developments as well as Server-side developments. JavaScript contains a standard library of objects, like Array, Date, and Math, and a core set of language elements like operators, control structures, and statements.

Advantages of JavaScript

The merits of using JavaScript are −

  • Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
  • Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
  • Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
  • Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.

Link for the ProblemDay 4: Count Objects– Hacker Rank Solution

Day 4: Count Objects – Hacker Rank Solution

Problem:

Objective

In this challenge, we learn about iterating over objects. Check the attached tutorial for more details.

Task

Complete the function in the editor. It has one parameter: an array, , of objects. Each object in the array has two integer properties denoted by  and . The function must return a count of all such objects  in array  that satisfy .

Input Format

The first line contains an integer denoting .
Each of the  subsequent lines contains two space-separated integers describing the values of  and .

Constraints

image 22

Output Format

Return a count of the total number of objects  such that . Locked stub code in the editor prints the returned value to STDOUT.

Sample Input 0

5
1 1
2 3
3 3
3 4
4 5

Sample Output 0

2

Explanation 0

image 21
Day 4: Count Objects– Hacker Rank Solution
function getCount(objects) {
  let pairCount = 0;
  for (let i = 0; i < objects.length; i++) {
    if (objects[i].x === objects[i].y) {
      pairCount++;
    }
  }
  return pairCount;
}

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