Rock, Scissors, Paper in a circular array. All you have to do to test for win condition is check if the other player has the next item in the array. Equality

Rock, Scissors, Paper in a circular array. All you have to do to test for win condition is check if the other player has the next item in the array. Equality is a tie. Base case is a loss. It's also my favorite case of structuring data in a way that makes the algorithm self-evident.