Algorithm
Hacker rank Problem Name: 10 Days of JavaScript -
Hacker rank Problem Link: https://www.hackerrank.com/challenges/js10-count-objects/problem?isFullScreen=true
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, a of objects. Each object in the array has two integer properties denoted by x and y.The function must return a count of all such objects o in array a that satisfy o * x == o * y
Input Format
The first line contains an integer denoting n. Each of the n subsequent lines contains two space-separated integers describing the values of x and y.
Constraints
- 5 <= n <= 10
- 1<= x.y <= 100
Output Format
Return a count of the total number of objects o such that o * x == o * y. 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
There are n = 5 objects in the objects array:
- objects0 = {x: 1, y: 1}
- objects1 = {x: 2, y: 3}
- objects2 = {x: 3, y: 3}
- objects3 = {x: 3, y: 4}
- objects4 = {x: 4, y: 5}
Because we have two objects o that satisfy o * x == 0* y (i.e., objects0 and objects2), we return 2 as our answer.
Code Examples
#1 Code Example with Javascript Programming
Code -
Javascript Programming
'use strict';
process.stdin.resume();
process.stdin.setEncoding('utf-8');
let inputString = '';
let currentLine = 0;
process.stdin.on('data', inputStdin => {
inputString += inputStdin;
});
process.stdin.on('end', _ => {
inputString = inputString.trim().split('\n').map(string => {
return string.trim();
});
main();
});
function readLine() {
return inputString[currentLine++];
}
function getCount(objects) {
var count=0;
for (var index in objects)
{
if (objects[index].x==objects[index].y)
{
count++;
}
}
return count;
}
Input
Output