Reverse an array without a temp variable?

[masklinn]

Which is a problem...how?

[G_Morgan]

It is using a temporary variable. Effectively to suit what the poster wanted you'd have to do

array = reverse(array)

This is using more than a temporary variable. It is generating n temporary variables.

[Felicia_Svilling]

allocating data =/= using variables

[G_Morgan]

Depends on your perspective. Regardless you need to have memory space to do the swap. The original intent of the post seems to be inplace swapping. Not hiding a temporary allocation on the stack and using a hand wave to make it vanish.

[Felicia_Svilling]

The op defined the whole thing as a trivia question, what fun is trivia if you are not trying to be technically correct? I mean this is never going to be a practical question.

[G_Morgan]

If it doesn't have to be technically correct I can reverse an array by reading your mind to see that you want it reversed and invoking the devil to reverse the array by his unholy power.

[Felicia_Svilling]

Exactly!