http://www.artima.com/weblogs/viewpost.jsp?thread=101605 http://www.artima.com/weblogs/viewpost.jsp?thread=101605 Not part of the language as far as I can see,

http://www.artima.com/weblogs/viewpost.jsp?thread=101605 http://www.artima.com/weblogs/viewpost.jsp?thread=101605 Not part of the language as far as I can see, more a way how you do this in python