parseInt(null, 24) === 23… wait, what?

Question

Alright, so I was messing around with parseInt to see how it handles values not yet initialized and I stumbled upon this gem. The below happens for any radix 24 or above.

Answer 1

parseInt uses alphanumeric representation, then in base-24 "n" is valid, but "u" is invalid character, then parseInt only parses the value "n"....

parseInt("n",24) -> 23

as an example, try with this:

alert(parseInt("3x", 24))

The result will be "3".