How can I use the regex pattern with the exclude function for filtering out unwanted data from a dataset?

 In the context of Salesforce, here is the approach given:-

Let us consider a scenario where you have a text dataset that contains email addresses and you want to extract only email addresses that do not end with “.gov”. Here is how you can achieve this by using a negative lookahead assertion on the regex pattern:-

Import java.util.regex.Matcher;

Import java.util.regex.Pattern;

Public class RegexExample {

    Public static void main(String[] args) {

        String text = “Emails: john.doe@example.com, jane_smith@gmail.com, admin@example.gov”;

        // Define the regex pattern to match email addresses not ending with “.gov”

        String regexPattern = \b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.(?!gov\b)[A-Za-z]{2,}\b;

        // Compile the pattern and create a matcher object

        Pattern pattern = Pattern.compile(regexPattern);

        Matcher matcher = pattern.matcher(text);

        // Find and print matching email addresses

        While (matcher.find()) {

            System.out.println(“Match: “ + matcher.group());

        }

    }

}

Here is the example given by using the Python programming language

Import re

# Function to extract email addresses not ending with “.gov” from a given text

Def extract_emails(input_text):

    # Define the regex pattern to match email addresses not ending with “.gov”

    Regex_pattern = r’[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+.(?!gov)[A-Za-z]{2,}’

    # Find all matching email addresses

    Matches = re.findall(regex_pattern, input_text)

    Return matches

# Read text from a file (e.g., emails.txt)

Def read_text_from_file(file_path):

    With open(file_path, ‘r’) as file:

        Text = file.read()

    Return text

# Example usage

If __name__ == “__main__”:

    # Read text from a file (you can replace ‘emails.txt’ with your file path)

    Input_text = read_text_from_file(‘emails.txt’)

    # Extract email addresses not ending with “.gov”

    Extracted_emails = extract_emails(input_text)

    # Print the extracted email addresses

    Print(“Email addresses not ending with ‘.gov’:”)

    For email in extracted_emails:

        Print(email)

Here is the example given by using HTML:-

<meta</span> charset=”UTF-8”>

<meta</span> name=”viewport” content=”width=device-width, initial-scale=1.0”>

[removed]

    Function extractEmails() {

        Var inputText = document.getElementById(‘inputText’).value;

        Var regexPattern = /[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+.(?!gov)[A-Za-z]{2,}/g;

        Var extractedEmails = inputText.match(regexPattern);

        // Display extracted email addresses

        Var outputDiv = document.getElementById(‘outputDiv’);

        outputDiv[removed] = “Email addresses not ending with ‘.gov’:”;

        if (extractedEmails && extractedEmails.length > 0) {

            for (var I = 0; I < extractedEmails xss=removed xss=removed>

[removed]


    Email Extraction


    Enter text containing email addresses:



    Extract Email Addresses