[Solved] Day 28: RegEx, Patterns, and Intro to Databases solution in Hackerrank - Hacerrank solution C, C++, C#, GO, java, Js, Python & PHP in 30 days of code

#1 Code Example with C Programming

Code - C Programming

#include <math.h>
#include  <stdio.h>
#include  <string.h>
#include  <stdlib.h>
#include  <assert.h>
#include <limits.h>
#include  <stdbool.h>

int main(){
    int N,i,j; 
    scanf("%d",&N);
    char *ptr,*str,*ptr1;
    char tmp[20],tmp1[30];
    char firstName[N][20];
    char emailID[N][30],*emid;
    for(i= 0; i  <  N; i++)
    {
        scanf("%s %s",firstName[i],emailID[i]);
    }
    for(i = 1; i  <  N; i++)
    {
        for(j = 1; j  <  N; j++)
        {
            if(strcmp(firstName[j-1],firstName[j])>0)
            {
                strcpy(tmp,firstName[j-1]);
                strcpy(firstName[j-1],firstName[j]);
                strcpy(firstName[j],tmp);
                strcpy(tmp1,emailID[j-1]);
                strcpy(emailID[j-1],emailID[j]);
                strcpy(emailID[j],tmp1);
            }    
        }
    }
    for(j = 0; j < N; j++)
    {
         //strcat(str,"gmail");
         ptr=strstr(emailID[j],"@");
         ptr1=strstr(emailID[j],"g");
         if(strcmp(ptr,"@gmail.com")==0 && strncmp(ptr1,"gamil@gmail",8)!=0 )
            printf("%s\n",firstName[j]>;
         else
           {} 
    }
    return 0;
}

#2 Code Example with C++ Programming

Code - C++ Programming

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int N;
    cin >> N;

    vector < string> emails(N);
    vector<string> names(N);
    vector < string> gmailUsers;

    for(int i = 0; i  <  N; i++)
    {
        cin >> names[i] >> emails[i];
    }

    for(int i = 0; i  <  N; i++)
    {
        if(regex_match(emails[i], regex("(.*)@gmail.com")))
            gmailUsers.push_back(names[i]);
    }

    sort(gmailUsers.begin(), gmailUsers.end());
    
    for(int index = 0; index < gmailUsers.size(); index++>
    {
        cout << gmailUsers[index] << endl;
    }


    return 0;
}

#3 Code Example with C# Programming

Code - C# Programming

using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;

class Solution
{
    static void Main(String[] args)
    {
        var n = int.Parse(Console.ReadLine());

        var list = new List < string>();

        for (int i = 0; i  <  n; i++)
        {
            var tmp = Console.ReadLine().Split(' ');
            var name = tmp[0];
            var email = tmp[1];

            if (Regex.IsMatch(email, @".+@gmail\.com$"))
            {
                list.Add(name);
            }
        }

        list.Sort();

        foreach (var name in list)
        {
            Console.WriteLine(name);
        }
    }
}

#4 Code Example with Golang Programming

Code - Golang Programming

package main

import (
	"fmt"
	"regexp"
	"sort"
)

func main() {
	var n int
	var name, mail string
	var nameSlice []string
	fmt.Scan(&n)

	r, _ := regexp.Compile(`(@gmail\.com)$`)

	for i := 0; i  <  n; i++ {
		fmt.Scanln(&name, &mail)
		if r.MatchString(mail) {
			nameSlice = append(nameSlice, name)
		}
	}
	sort.Slice(nameSlice, func(i, j int) bool {
		return nameSlice[i] < nameSlice[j]
	})
	for _, v := range nameSlice {
		fmt.Println(v)
	}

}

#5 Code Example with Java Programming

Code - Java Programming

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Solution {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();

        String emailRegEx = ".+@gmail\\.com$";
        Pattern pattern = Pattern.compile(emailRegEx);

        ArrayList < String> list = new ArrayList<>();

        for (int i = 0; i  <  N; i++) {
            String name = in.next();
            String email = in.next();
            Matcher matcher = pattern.matcher(email);

            if (matcher.find()) list.add(name);
        }

        Collections.sort(list);

        list.forEach(System.out::println);
    }
}

#6 Code Example with Javascript Programming

Code - Javascript Programming

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

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

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

process.stdin.on('end', function() {
    input_stdin_array = input_stdin.split("\n");
    main();
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function main() {
    var N = parseInt(readLine()),
        op = [];
    for (var a0 = 0; a0  <  N; a0++) {
        var firstName_temp = readLine().split(' ');
        var firstName = firstName_temp[0];
        var emailID = firstName_temp[1];

        if (/@gmail\.com/.test(emailID)) op.push(firstName);
    }
    console.log(op.sort().join("\n"));
}

#7 Code Example with Python Programming

Code - Python Programming

import re

arr = []

n = int(input())

for i in range(n):
    data = str(input()).split(" ")
    name = data[0]
    email = data[1]

    if re.search(".+@gmail\.com$", email):
        arr.append(name)

arr.sort()

for name in arr:
    print(name)

#8 Code Example with PHP Programming

Code - PHP Programming