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Football Matches - JavaScript (Basic) certification Test Solution | HackerRank

4 min read


Solution:



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'use strict';
const fs = require('fs');
const https = require('https');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', function (inputStdin) {
    inputString += inputStdin;
});

process.stdin.on('end', function () {
    inputString = inputString.split('\n');

    main();
});

function readLine() {
    return inputString[currentLine++];
}

const fs = require('fs');
const https = require('https');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', function (inputStdin) {
    inputString += inputStdin;
});

process.stdin.on('end', function () {
    inputString = inputString.split('\n');

    main();
});

function readLine() {
    return inputString[currentLine++];
}


const fetch = (url) => {
    return new Promise((resolve, reject) => {
        https
            .get(url, (resp) => {
                let data = '';

                resp.on('data', (chunk) => {
                    data += chunk;
                });

                resp.on('end', () => {
                    resolve(JSON.parse(data));
                });
            })
            .on('error', (err) => {
                reject(err.message);
            });
    });
};

const getAPIURL = (year, page) => {
    return `https://jsonmock.hackerrank.com/api/football_matches?competition=UEFA%20Champions%20League&year=${year}&page=${page}`;
};

const getFootballMatches = (year, page) => {
    const url = getAPIURL(year, page);
    return new Promise((resolve, reject) => {
        fetch(url)
            .then((jsonRespone) => resolve(jsonRespone))
            .catch((e) => reject(e.message));
    });
};
async function getTeams(year, k) {
    // write your code here
    // API endpoint template: https://jsonmock.hackerrank.com/api/football_matches?competition=UEFA%20Champions%20League&year=<YEAR>&page=<PAGE_NUMBER>

    const matchesPerTeam = {};
    let initialPage = 1;
    let totalPages = 1;
    while (initialPage <= totalPages) {
        const { total_pages, data: matches } = await getFootballMatches(
            year,
            initialPage,
        );

        matches.forEach(({ team1, team2 }) => {
            matchesPerTeam[team1] = (matchesPerTeam[team1] || 0) + 1;
            matchesPerTeam[team2] = (matchesPerTeam[team2] || 0) + 1;
        });
        totalPages = total_pages;
        initialPage += 1;
    }
    return Object.entries(matchesPerTeam)
        .filter(([, numOfMatches]) => numOfMatches >= k)
        .map(([team]) => team)
        .sort();
}
async function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const year = parseInt(readLine().trim());
    const k = parseInt(readLine().trim());

    const teams = await getTeams(year, k);

    for (const team of teams) {
        ws.write(`${team}\n`);
    }
}
Labels : #hackerrank ,#hackerrank certification ,#javascript (basic) ,

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