Add Palindromic Number in OCaml

[alope107]

I Am Adding a New Code Snippet in an Existing Language

• I fixed Add Palindromic Number in OCaml #5968
• I did not include any extra folders/libraries
• I named the pull request using Add {PROJECT} in {LANGUAGE} format

[pascalecu]

Isn't this just String.equal str (String.rev str)?

[alope107]

String.rev is part of the Jane Street Base, not Stdlib. Using only Stdlib you could convert the string into a list and reverse that, but I think you incur a O(len(string)) space penalty.

My solution should be O(1) space due to the tail call, which I've now added an attribute to confirm.