Jassif Team Institution

const pattern = /\b\w+\b/g;
const text = "Hello Jassif Team";
let result;

while ((result = pattern.exec(text)) !== null) {
  console.log(`Found: ${result[0]} at ${result.index}`);
}

const emailPattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
const email = "user@jassifteam.com";

console.log(emailPattern.test(email)); // true

const userInput = "[Special*Characters?]";
const escaped = RegExp.escape(userInput);
const pattern = new RegExp(escaped, 'gi');

console.log(pattern.test("Test [Special*Characters?]")); // true

const pattern = /test/gi;

console.log(pattern.global);     // true
console.log(pattern.ignoreCase); // true
console.log(pattern.source);     // "test"
console.log(pattern.flags);      // "gi"

function extractEmails(text) {
  const emailPattern = /\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b/g;
  return text.match(emailPattern) || [];
}

function extractHashtags(text) {
  const hashtagPattern = /#\w+/g;
  return text.match(hashtagPattern) || [];
}

function isValidURL(url) {
  const urlPattern = /^(https?:\/\/)?([\da-z.-]+)\.([a-z.]{2,6})(\/\S*)?$/;
  return urlPattern.test(url);
}

function formatPhoneNumber(phone) {
  const pattern = /^(\d{3})(\d{3})(\d{4})$/;
  return phone.replace(pattern, '($1) $2-$3');
}