DAY 4: Count Objects

Hackerrank Solution 10 Days Of Javascript

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

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

Sample Output 0

Explanation 0

There are

objects in the

array:

Because we have two objects

that satisfy

(i.e.,

and

), we return

as our answer.

SOLUTION

function getCount(objects) {
    return objects.filter(item =>item.x===item.y).length;
}


function main() {
    const n = +(readLine());
    let objects = [];
    
    for (let i = 0; i < n; i++) {
        const [a, b] = readLine().split(' ');
        
        objects.push({x: +(a), y: +(b)});
    }
    
    console.log(getCount(objects));
}

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DAY 4: Count Objects | Hackerrank Solution | 10 Days Of Javascript