freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/68f6587287ad1f4ad39b0c85.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
68f6587287ad1f4ad39b0c85	Challenge 99: Fingerprint Test	28	challenge-99

--description--

Given two strings representing fingerprints, determine if they are a match using the following rules:

• Each fingerprint will consist only of lowercase letters (a-z).
• Two fingerprints are considered a match if:
  • They are the same length.
  • The number of differing characters does not exceed 10% of the fingerprint length.

--hints--

isMatch("helloworld", "helloworld") should return true.

assert.isTrue(isMatch("helloworld", "helloworld"));

isMatch("helloworld", "helloworlds") should return false.

assert.isFalse(isMatch("helloworld", "helloworlds"));

isMatch("helloworld", "jelloworld") should return true.

assert.isTrue(isMatch("helloworld", "jelloworld"));

isMatch("thequickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthelazydog") should return true.

assert.isTrue(isMatch("thequickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthelazydog"));

isMatch("theslickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthehazydog") should return true.

assert.isTrue(isMatch("theslickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthehazydog"));

isMatch("thequickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthehazycat") should return false.

assert.isFalse(isMatch("thequickbrownfoxjumpsoverthelazydog", "thequickbrownfoxjumpsoverthehazycat"));

--seed--

--seed-contents--

function isMatch(fingerprintA, fingerprintB) {

  return fingerprintA;
}

--solutions--

function isMatch(fingerprintA, fingerprintB) {
  if (fingerprintA.length !== fingerprintB.length) return false;

  const length = fingerprintA.length;
  let mismatches = 0;

  for (let i = 0; i < length; i++) {
    if (fingerprintA[i] !== fingerprintB[i]) {
      mismatches++;
      if (mismatches > length * 0.1) return false;
    }
  }

  return true;
}