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  1. Prepare
  2. Regex
  3. Applications
  4. Detect the Email Addresses
  5. Discussions

Detect the Email Addresses

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170 Discussions

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  • noavelasco
     + 0 comments

    JS

    let pat = new RegExp(/\b([\w.]+)@([\w.]+)\.(\w+)\b/, "gm");
let occs = new Set(input.match(pat).sort());
console.log([...occs].join(";"));

    \b <--- start and end of a "word" (or email) ---> \b

    \w = [a-zA-Z_]

    [\w.] : We don't need to scape dots inside those brackets.

  • manish_swarnaka2
     + 0 comments

    Enter your code here. Read input from STDIN. Print output to STDOUT

    this works for me

    import re import sys

    html= sys.stdin.read()

    pattern= r'\w*.?\w+@\w+.?\w*.?\w*.?\w+'

    matches=re.findall(pattern,html)

    output=sorted(set(email for email in matches))

    print(';'.join(output))

  • vanessalombrd
     + 0 comments

    JavaScript

    I made it so complex, even I got confused.

    function processData(input) {
    let criteria = /([a-z\d._]+)@([a-z\d._]+\.[a-z]+)/gi;
    let arr = input.match(criteria);
    let emails = [...new Set(arr)];
    console.log(emails.sort().join(";"));
}

    Corrected regex: let criteria = /[\w._]+@[\w._]+[\w]/g;

  • preethiannjacob
     + 0 comments

    Java 15

    import java.io.*;
import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class Solution {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt(); scanner.nextLine();
        // Before and After @: (word.word.word...), with atleast one word, where each word is \w+
        Pattern pattern = Pattern.compile("\\w+(\\.\\w+)*@\\w+(\\.\\w+)*"); 
        // Creating hashset to hold unique emails
        HashSet<String> hashset = new HashSet<String>();
        for (int i=0;i<n;i++) {
               Matcher matcher = pattern.matcher(scanner.nextLine());
               while(matcher.find())    hashset.add(matcher.group());
        }
        // Converting hashset to arraylist in order to use sort()
        ArrayList arraylist = new ArrayList<String>(hashset);
        // Sorting arraylist in lexicographical order
        Collections.sort(arraylist);
        // Using ListIterator to iterate through arraylist
        ListIterator<String> iterator = arraylist.listIterator();
        while(iterator.hasNext()) {
            System.out.print(iterator.next());
            if(iterator.hasNext())  System.out.print(";");
        }
    }
}

  • nhatminhlearnin1
     + 1 comment

    Python 3

    import re
import sys
n = int(input())
string = sys.stdin.read()

pattern = r'((\w+(\.\w+)*)@(\w+(\.\w+)*))'
matches = re.finditer(pattern, string)
email = set()
for match in matches:
    email.add(match.group(0))
print(";".join(sorted(list(email)))