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  1. Prepare
  2. Regex
  3. Assertions
  4. Positive Lookbehind
  5. Discussions

Positive Lookbehind

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31 Discussions

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  • 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);
        Pattern pattern = Pattern.compile("(?<=[13579])[0-9]");
        Matcher matcher = pattern.matcher(scanner.nextLine());
        int count = 0;
        while(matcher.find())   count++;
        System.out.println("Number of matches : "+count);
    }
}

  • Tania15
     + 0 comments
    Regex_Pattern = r"(?<=[13579])\d"   # Do not delete 'r'.

import re

Test_String = input()

match = re.findall(Regex_Pattern, Test_String)

print("Number of matches :",

  • lalomax
     + 0 comments

    My solution using typescript:

    function main() {
    // Enter your code here
    const regexPattern: RegExp = /(?<=[13579])\d/g
    const test: string = readLine()
    console.log("Number of matches : " + test.match(regexPattern).length)
}

  • Bavly_Zaher
     + 0 comments
    (?<=[13579])\d

  • budropestu
     + 0 comments

    With Python

    Regex_Pattern = r"(?<=[13579])\d"