Alphanumeric Palindrome Check
A phrase counts as a palindrome if, after ignoring every character that is not a letter or digit and treating upper and lower case as equal, it reads the same forwards and backwards.
Return true if s is such a palindrome, otherwise false. An empty phrase is a palindrome.
Example 1
Input: s = "Never odd, or even." Output: true
Example 2
Input: s = "deploy on friday" Output: false
Constraints
- 0 <= s.length <= 2 * 10^5
- s contains printable ASCII characters.
Hint 1
Use one pointer at each end and move them toward each other.
Hint 2
Skip characters that are not letters or digits before comparing.
Good practice for: Frontend Developer, Backend Developer, Full Stack Developer, Mobile App Developer, Game Developer, Automation Test Engineer
Run checks your code on 2 sample tests. Submit runs all 8 tests, including hidden ones, and earns points. Use console.log to debug. Python's first run can take a few seconds while it starts.