1108. Defanging an IP Address

Given a valid (IPv4) IP address, return a defanged version of that IP address.
A defanged IP address replaces every period "." with "[.]".

• Example 1:
  Input: address = "1.1.1.1"
  Output: "1[.]1[.]1[.]1"

• Example 2:
  Input: address = "255.100.50.0"
  Output: "255[.]100[.]50[.]0"

// method 1
var defangIPaddr = function(address) {
    let result = address.split('.');
    return address.split('.').map((i, idx) => {
      if(idx !== result.length - 1) {
        return i + '[.]';
      }
      return i;
    }).join('');
};

// method 2
var defangIPaddr = function(address) {
    return address.replace(/\./g, '[.]')
};