Note the GPL license. Nothing wrong with that but if you copy one of these into a code base you're developing, GPL applies to the whole "derived work". If you'r

Note the GPL license. Nothing wrong with that but if you copy one of these into a code base you're developing, GPL applies to the whole "derived work". If you're sufficiently cautious about legal matters it may be be best to avoid looking at this code at all if you plan to implement any of these techniques in a non-GPL project.