random-palindromes.js

// Write a script that creates an array with 10000 random words between 3 and 5
// characters, and returns the number of words that are palindromes in that
// array. Notes: The code needs to be in javascript You’ll need to return just
// the number of words.

console.log(main());

function main() {
  return Array.from({ length: 10_000 })
    .map(RandomAlphabeticString(3, 5))
    .filter(isPalindrome).length;
}

function RandomAlphabeticString(min, max) {
  const a = 'a'.charCodeAt(0);
  const z = 'z'.charCodeAt(0);

  return () => {
    return Array.from({ length: random(min, max) })
      .map(() => String.fromCharCode(random(a, z)))
      .join('');
  };
}

function random(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function isPalindrome(string) {
  for (let i = 0; i < Math.floor(string.length / 2); i++) {
    if (string.at(i) !== string.at(-(i + 1))) {
      return false;
    }
  }
  return true;
}