Hi,<BR><BR>I'm currently coding a function in Java that will find the number of possible combinations for a string. I've run into a problem in to a problem with regards to both speed and memory usage.

Some inventions operate in a recursive or iterative manner. This could be so of a machine that repeats actions or functions on a single article or to produce multiple articles, or operates on data.

Reversible programming languages and computing represent a forward‐looking paradigm in which every computational operation is designed to be invertible. In these systems, each transition from one ...