leetcode-125 验证回文串

/**
 * @param {string} s
 * @return {boolean}
 */
var isPalindrome = function (s) {
  s = s.replace(/[^a-zA-Z0-9]/g, "");
  s = s.toLocaleLowerCase();
  const mid = Math.floor(s.length / 2);
  for (let i = 0; i < mid; i++) {
    if (s[i] !== s[s.length - 1 - i]) {
      return false;
    }
  }
  return true;
};

console.log(isPalindrome("A man, a plan, a canal: Panama"));