1108. Defanging an IP Address

Description

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"

Constraints:

The given address is a valid IPv4 address.

My Solution

Source Code

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/**
 * @param {string} address
 * @return {string}
 */
let defangIPaddr = function(address) {
    return address.replace(/\./g, "[.]");
};

Analysis

Okay maybe this problem was a little too easy. All I did was use a simple regular expression. Using JavaScript's built-in functions is almost always going to be faster than implementing your own string replacement functions so I didn't see a need to do that. Plus it's always good to get more practice with regular expressions.