strong-password.js

/*
 Title: Strong Password
 Difficulty: Easy
 Score: 15
 Link: https://www.hackerrank.com/challenges/strong-password
*/

module.exports = function passwordStrengthMinimumNumber(n, password) {
  const STRONG_LENGTH = 6;
  const missingChars = STRONG_LENGTH - n;
  let score = 0;

  const passwordAsArray = Array.from(password);

  const hasNumber = passwordAsArray.some(char => "0123456789".includes(char));
  const hasLowerCase = passwordAsArray.some(char =>
    "abcdefghijklmnopqrstuvwxyz".includes(char)
  );
  const hasUpperCase = passwordAsArray.some(char =>
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ".includes(char)
  );
  const hasSpecialChar = passwordAsArray.some(char =>
    "!@#$%^&*()-+".includes(char)
  );

  if (!hasNumber) score++;
  if (!hasLowerCase) score++;
  if (!hasUpperCase) score++;
  if (!hasSpecialChar) score++;

  return Math.max(score, missingChars);
};