Cache an intermediate variable in an one-liner

Question

Can I somehow cache the i.toString in this simple definition of function?

def palindrome(i: Int) = i.toString == i.toString.reverse

I want to keep this function simple, w/o a classic multi-line, brace-enclosed function..

Answer 1

You could do:

def palindrome(i: Int) = ((s:String) => s == s.reverse)(i.toString)

Answer 2

Well, Scala doesn't have a let statement like some traditional functional languages, but that's largely because val + braces fulfill the same purpose. Are you objecting to the multi-line part or to braces in general? Because it's pretty hard to beat:

def palindrome(i: Int) = { val s = i.toString; s == s.reverse }

Attempts to elide the braces will likely only drive the character count up.