palindromic.js

#!/usr/bin/env node

var limit = process.argv[2]
  , palindromes = [];

if (!limit) {
  console.error('Provide a limit!');
  process.exit(1);
}

function checkPalindrome(numstr) {
  var isPalindrome = true;

  for (var i = 0, len = numstr.length; i < len / 2; i++) {
    if (numstr.charAt(i) !== numstr.charAt(len - i - 1)) {
      isPalindrome = false;

      break;
    }
  }

  return isPalindrome;
}

for (var i = 1; i < limit; i++) {
  if (checkPalindrome(i.toString())) {
    palindromes.push(i);
  }
}

console.log(palindromes.length);