18 -【leetcode】回文字符串

[Guyidingsanyu]

leetcode - 回文字符串

[Guyidingsanyu]

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
    const str = String(x)
    const middleIndex = parseInt(str.length / 2)
    for (let i = 0; i < middleIndex; i++) {
        if (str[i] !== str[str.length - 1 - i]) {
            return false
        }
    }
    return true
};

[wucuiping]

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
    if (x < 0) {
        return false
    } else if (x < 10) {
        return true
    } else {
        let arr = x.toString().split('')
        arr = arr.reverse().join('')
        arr = parseInt(arr)
        if (arr === x) {
            return true
        }
        return false
    }
};

[OceanApart]

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
  if (x < 0) return false

  x += ''

  var left = 0
  var right = x.length - 1

  while (left < right) {
    if (x[left] !== x[right]) {
      return false
    }

    left++
    right--
  }

  return true
};