let arr5 = [
  { username: "Nina", password: "L0pedium" },
  { username: "Pesho", password: "elf" },
];

const isUpperCase = (char) => {
  let changed = char.toUpperCase();
  if (char === changed) {
    return true;
  }
  return false;
};

const isLowerCase = (char) => {
  let changed = char.toLowerCase();
  if (char === changed) {
    return true;
  }
  return false;
};
function isNumeric(num) {
  return !isNaN(num);
}
let result5 = arr5.filter((el) => {
  let hasLowerLetter = false;
  let hasUpperLetter = false;
  let hasNumber = false;
  for (let i = 0; i < el.password.length; i++) {
    let char = el.password[i]; //L
    if (isUpperCase(char) === true) {
      hasUpperLetter = true;
    }
    if (isLowerCase(char) === true) {
      hasLowerLetter = true;
    }
    if (isNumeric(char) === true) {
      hasNumber = true;
    }
  }

  if (
    hasLowerLetter === true &&
    hasUpperLetter === true &&
    hasNumber === true &&
    el.password.length >= 8
  ) {
    return true;
  }
  return false;
});
console.log(result5);