Hackerrank - HackerRank Tweets

Popis problému
Celý popis zadania sa nacháza – Hackerrank.

Riešenie
Skontrolovať, či každý riadok je validný pre nasledovný regulárny výraz.
.*hackerrank.*

Vytvoril som riešenie v týchto programovacích jazykoch:

Java
JavaScript
Scala
Ruby

Všetky riešenia sú dostupné aj na mojom GitHub profile.

Java

import java.util.*;

public class HackerrankTweets {

    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        int tests = Integer.parseInt(stdin.nextLine());
        int count = 0;
        for(int i = 0; i < tests; i++) {
            if(stdin.nextLine().toLowerCase().matches(".*hackerrank.*")) {
                count++;
            }
        }
        System.out.println(count);
        stdin.close();
    }
}

import java.util.*;

public class HackerrankTweets {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

int tests = Integer.parseInt(stdin.nextLine());

int count = 0;

for(int i = 0; i < tests; i++) {

if(stdin.nextLine().toLowerCase().matches(".*hackerrank.*")) {

count++;

}

System.out.println(count);

stdin.close();

}

JavaScript

'use strict';

const processData = input => {
    let lines = input.split('\n').slice(1);
    let matches = lines.filter(line => line.toLowerCase().match(/.*hackerrank.*/));
    console.log(matches.length);
};

process.stdin.resume();
process.stdin.setEncoding("ascii");

var _input = "";
process.stdin.on("data", input => _input += input);
process.stdin.on("end", () => processData(_input));

'use strict';

const processData = input => {

let lines = input.split('\n').slice(1);

let matches = lines.filter(line => line.toLowerCase().match(/.*hackerrank.*/));

console.log(matches.length);

};

process.stdin.resume();

process.stdin.setEncoding("ascii");

var _input = "";

process.stdin.on("data", input => _input += input);

process.stdin.on("end", () => processData(_input));

Scala

import scala.io.Source

object HackerrankTweets extends App {
  val lines = Source.stdin.getLines().drop(1)
  val matchingLines = lines.count(_.toLowerCase.matches(".*hackerrank.*"))
  println(matchingLines)
}

import scala.io.Source

object HackerrankTweets extends App {

val lines = Source.stdin.getLines().drop(1)

val matchingLines = lines.count(_.toLowerCase.matches(".*hackerrank.*"))

println(matchingLines)

}

Ruby

tests = gets.chomp.to_i
result = 0
tests.times do
  words = gets.chomp.split
  words.each do |word|
    result += 1 if word.downcase =~ /.*hackerrank.*/
  end
end

puts result

tests = gets.chomp.to_i

result = 0

tests.times do

words = gets.chomp.split

words.each do |word|

result += 1 if word.downcase =~ /.*hackerrank.*/

end

puts result

Pavol Pidanič

Dokážem na 10 prstoch napočítať do 1023

Hackerrank – HackerRank Tweets