JS10 Day 4: Count Objects

개요

JS10 Day 4: Count Objects

• https://www.hackerrank.com/challenges/js10-count-objects/problem

해커랭크 10 Days of Javascript

#	문제	비고
4-5 Day e
12	JS10 Day 4: Create a Rectangle Object
13	JS10 Day 4: Count Objects
14	JS10 Day 4: Classes
15	JS10 Day 5: Inheritance
16	JS10 Day 5: Template Literals
17	JS10 Day 5: Arrow Functions

---

'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++];
}

/*
 * Return a count of the total number of objects 'o' satisfying o.x == o.y.
 * 
 * Parameter(s):
 * objects: an array of objects with integer properties 'x' and 'y'
 */
function getCount(objects) {
    var cnt = 0;
    for(var i in objects) {
        var o = objects[i];
        if( o.x == o.y ) cnt++;
    }
    return cnt;
}

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));
}