Python Code Snippets

http://docs.google.com/leaf?id=0BxAyc2Ideg6RNWY2ZDY0YzUtZWRhZS00ZjQwLWExOTQtYzg4YWUwZjliMTgw&hl=en_GB

LISP code snippets

http://docs.google.com/leaf?id=0BxAyc2Ideg6RYTBjNjM5YmItYmE5ZS00NGU5LWI2ZjMtMmVjNDg3Y2I2NDll&hl=en_GB

Quick Sort in LISP

http://docs.google.com/Doc?docid=0ARAyc2Ideg6RZGYybjJ3cXJfMzQwZGtkdjM4aG0&hl=en_GB

I read two nice articles on Closures:

http://www.martinfowler.com/bliki/Closure.html

http://gafter.blogspot.com/2007/01/definition-of-closures.html

worth a read!!