Password Rule Checker

Build a small password validator. Each rule should live in its own function, and the final validator should report which rules failed.

Write these functions:

hasMinimumLength(password) should return true when the password has at least 8 characters.
hasNumber(password) should return true when the password contains at least one number.
hasUppercaseLetter(password) should return true when the password contains at least one uppercase letter.
getFailedRules(password) should return an array of missing rule names.
validatePassword(password) should return an object with valid and failedRules.

Sample checks:

console.log(validatePassword('hello'));console.log(validatePassword('Hello123'));console.log(validatePassword('hello123'));console.log(validatePassword('HELLOABC'));

Expected output:

txt

{ valid: false, failedRules: ["minimum length", "number", "uppercase letter"] }{ valid: true, failedRules: [] }{ valid: false, failedRules: ["uppercase letter"] }{ valid: false, failedRules: ["number"] }

Use "minimum length", "number", and "uppercase letter" as the failed rule names.

Solution

Solution:

function hasMinimumLength(password) {  return password.length >= 8;}function hasNumber(password) {  for (const character of password) {    if (character >= '0' && character <= '9') {      return true;    }  }  return false;}function hasUppercaseLetter(password) {  for (const character of password) {    if (character >= 'A' && character <= 'Z') {      return true;    }  }  return false;}function getFailedRules(password) {  const failedRules = [];  if (!hasMinimumLength(password)) {    failedRules.push('minimum length');  }  if (!hasNumber(password)) {    failedRules.push('number');  }  if (!hasUppercaseLetter(password)) {    failedRules.push('uppercase letter');  }  return failedRules;}function validatePassword(password) {  const failedRules = getFailedRules(password);  return {    valid: failedRules.length === 0,    failedRules,  };}console.log(validatePassword('hello'));console.log(validatePassword('Hello123'));console.log(validatePassword('hello123'));console.log(validatePassword('HELLOABC'));