emailExtraction.js

const fs = require('fs');

const fileContents = fs.readFileSync('Emails.txt').toString();
const allEmailRegex = /@\S+\.\S+/g; //Regex to match all email addresses
const allEmailWithDifferentTopLevelDomain = /@\w+\.{1}/g; //Regex to match email address with same top level domain
const allEmailDomainMatches = fileContents.match(allEmailWithDifferentTopLevelDomain);

function readAndParseSoftWireEmails(emailLimit = 0) {
    let dictEmails = {};

    for (let i = 0; i < allEmailDomainMatches.length; i++) {
        if (!dictEmails.hasOwnProperty(allEmailDomainMatches[i])) {
            dictEmails[allEmailDomainMatches[i]] = 1;
        }
        else {
            dictEmails[allEmailDomainMatches[i]]++;
        }
    }

    let sortedValues = Object.entries(dictEmails).sort((a, b) => b[1] - a[1]);

    //Printing first 10 highest occurences
    console.log('Printing top 10 occurences of email domains')
    for (let j = 0; j <= 10; j++) {
        console.log(sortedValues[j]);
    }

    //Printing occurences greater than provided limit
    if (emailLimit != 0) {
        console.log('Printing email domains greater than provided count')
        for (let j = 0; j < sortedValues.length; j++) {
            if (sortedValues[j][1] > emailLimit) {
                console.log(sortedValues[j]);
            }
        }
    }
}
const userInput = 100;
readAndParseSoftWireEmails(userInput);