HackerRank matching specific string solution

Hello Programmers, In this post, you will know how to solve the HackerRank matching specific string solution. This problem is a part of the Regex HackerRank Series.

report this ad

One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

HackerRank matching specific string solution

Regular expression (or RegEx)

A regular expression is a sequence of characters that define a search pattern. It is mainly used for string pattern matching.

Regular expressions are extremely useful in extracting information from text such as: code, log files, spreadsheets, documents, etc.

We can match a specific string X in a test string S by making our regex pattern X. This is one of the simplest patterns. However, in the coming challenges, we’ll see how well we can match more complex patterns and learn about their syntax.

Task

You have a test string S. Your task is to match the string hackerrank. This is case sensitive.

Note

This is a regex only challenge. You are not required to write code.
You only have to fill in the regex pattern in the blank (_________).

report this adHackerRank matching specific string solutions in Cpp

#include <bits/stdc++.h>
using namespace std;
int main() 
{
    string s;
    getline(cin, s);
    
    string pattern = "hackerrank";
    int count = 0, found = s.find(pattern);
    
    while(found != string::npos)
    {
        count++;
        found = s.find(pattern, found + 1);
    }
    
    cout << "Number of matches : " << count;
    
    return 0;
}

HackerRank matching specific string solutions in Java

public class Solution {    
    public static void main(String[] args) {
        
        Regex_Test tester = new Regex_Test();
        tester.checker("hackerrank"); 
    
    }
}

HackerRank matching specific string solutions in Python

Regex_Pattern = r"hackerrank"	# Do not delete 'r'.

report this ad

HackerRank matching specific string solutions in JavaScript

var Regex_Pattern = "hackerrank";

HackerRank matching specific string solutions in PHP

$Regex_Pattern = "/hackerrank/"; //Do not delete '/'. Replace __________ with your regex. 

Disclaimer: This problem (Matching Specific String) is generated by HackerRank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

Next: HackerRank Matching Whitespace & Non-Whitespace Character Solution

Binary Tree Level Order Traversal II Leetcode Solution