468. 验证 IP 地址

468. 验证 IP 地址

leetcode 链接

解法一：依次遍历

/**
 * @param {string} queryIP
 * @return {string}
 */
var validIPAddress = function (queryIP) {
  const ipv4List = queryIP.split(".");
  if (ipv4List.length === 4) {
    for (let i of ipv4List) {
      if (String(i * 1) !== i || Number(i) > 255) {
        return "Neither";
      }
    }
    return "IPv4";
  }
  const ipv6List = queryIP.split(":");
  if (ipv6List.length === 8) {
    for (let i of ipv6List) {
      const reg = /^[0-9a-fA-F]{1,4}$/;
      if (!reg.test(i) || isNaN(parseInt(i, 16))) {
        return "Neither";
      }
    }
    return "IPv6";
  }
  return "Neither";
};