Contains code to generate and hash permutations. Not sure if that is of use to anyone but... Click generate permutations to generate all permutations of the numbers 1 and 2. Click it again for permutations of 1,2, and 3. Click it again for permutations of 1,2,3, and 4... etc. There is a hash algorithm that will assign a unique number to each permutation. The Hash Permutations button will add each permutation to a list at the position assigned by the hash algorithm.
I needed a good way to hash permutations for my game of eight solver. I didn't come up with this method until after I completed the solver. This would have been a better solution. This hash algorithm is pretty good because there are no collisions and no gaps. It's not so good because it is not super efficient.
