Given a string str, the task is to extract all the Email ID’s from the given string.
Example:
Input: “Please send your resumes to Hr@Iwillgetbacktoyou@gmail.com for any business inquiry please mail us at business@enquiry@gmail.com”
Output: Hr@Iwillgetbacktoyou@gmail.com
business@enquiry@gmail.com
Approach: The problem can be solved based on the following idea:
Create a regex pattern to validate the number as written below:
regex = “^[0-9]{3}[A-Z]{2}[0-9]{8}$“Where,
- $: Matches the end of the line
- \s: Matches whitespace
- \S: Matches any non-whitespace character
- *: Repeats a character zero or more times
- \S: Matches any non-whitespace character
- *?: Repeats a character zero or more times (non-greedy)
- +: Repeats a character one or more times
- +?: Repeats a character one or more times (non-greedy)
- [aeiou]: Matches a single character in the listed set
- [^ABC]: Matches a single character, not in the listed set
- [a-z0-9]: The set of characters can include a range
- (: Indicates where string extraction is to start
- ): Indicates where string extraction is to end
Follow the below steps to implement the idea:
- Create a regex expression to extract all the Email Ids from the string.
- Use Pattern class to compile the regex formed.
- Use the matcher function to find.
Below is the code implementation of the above-discussed approach:
C++
// C++ code for the above approach#include <iostream>#include <regex>#include <string>using namespace std;void findEmails(string str){ // You can Add n number of Email // formats in the below given // String Array. string strPattern[] = { "\\S+@\\S+" }; for (int i = 0; i < 1; i++) { regex pattern(strPattern[i]); smatch matches; while (regex_search(str, matches, pattern)) { cout << matches[0] << endl; str = matches.suffix().str(); } }}int main(){ string str = "Please send your resumes on " "Hr@Iwillgetbacktoyou.com " "for any business enquiry please mail us " "on business@enquiry.com " "review-team@geeksforgeeks.org " "and writing.geeksforgeeks.org"; findEmails(str); return 0;}// This code is contributed by shivamsharma215 |
Java
// Java code for the above approachimport java.io.*;import java.util.regex.Matcher;import java.util.regex.Pattern;public class GFG { // Driver Code public static void main(String[] args) { // String containing in it String str = "Please send your resumes on Hr@Iwillgetbacktoyou@gmail.com" + " for any business enquiry please mail us on business@enquiry@gmail.com" + " review-team@geeksforgeeks.org " + "and writing.geeksforgeeks.org"; findEmails(str); } // Function to extract all email // id's from a given string static void findEmails(String str) { // You can Add n number of Email // formats in the below given // String Array. String strPattern[] = { "\\S+@\\S+" }; for (int i = 0; i < strPattern.length; i++) { Pattern pattern = Pattern.compile(strPattern[i]); Matcher matcher = pattern.matcher(str); while (matcher.find()) { System.out.println(matcher.group()); } } }} |
Python3
import redef find_emails(text): # List of email patterns to look for patterns = [r"\S+@\S+"] for pattern in patterns: # Compile the pattern email_regex = re.compile(pattern) # Find all instances of the pattern in the text emails = email_regex.findall(text) # Print each email found for email in emails: print(email)# Example usagetext = "Please send your resumes on Hr@Iwillgetbacktoyou@gmail.com" \ " for any business enquiry please mail us on business@enquiry@gmail.com" \ " review-team@geeksforgeeks.org " \ "and writing.geeksforgeeks.org"find_emails(text) |
C#
// C# code for the above approachusing System;using System.Text.RegularExpressions;class GFG { // Driver Code static void Main(string[] args) { // String containing in it string str = "Please send your resumes on Hr@Iwillgetbacktoyou@gmail.com" + " for any business enquiry please mail us on business@enquiry@gmail.com" + " review-team@geeksforgeeks.org " + "and writing.geeksforgeeks.org"; findEmails(str); } // Function to extract all email // id's from a given string static void findEmails(string str) { // You can Add n number of Email // formats in the below given // String Array. string[] strPattern = { @"\S+@\S+" }; for (int i = 0; i < strPattern.Length; i++) { MatchCollection matches = Regex.Matches(str, strPattern[i]); foreach(Match match in matches) { Console.WriteLine(match.Value); } } }}// This code is contributed by ik_9 |
Javascript
// JS code to implement above approachfunction findEmails(str) { // You can Add n number of Email // formats in the below given // String Array. const strPattern = ["\\S+@\\S+"]; for (let i = 0; i < 1; i++) { const pattern = new RegExp(strPattern[i], 'g'); let matches; while ((matches = pattern.exec(str)) !== null) { console.log(matches[0]); } }}const str = "Please send your resumes on " + "Hr@Iwillgetbacktoyou.com " + "for any business enquiry please mail us " + "on business@enquiry.com " + "review-team@geeksforgeeks.org " + "and writing.geeksforgeeks.org";findEmails(str);//this code is contributed by Tushar_Rokade |
Output
Hr@Iwillgetbacktoyou@gmail.com business@enquiry@gmail.com review-team@geeksforgeeks.org
Time Complexity: O(n)
Space Complexity: O(n)
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