Please excuse my ignorance here --

> instead are able to write code that modifies code and generates code as easily as if you were writing the original code in the first place

Is this often done? I know it is conceptually possible with the advantage being that the same functions used to manipulate lists and data are available for this task, but I got the impression that not many people actually do this? For instance...

http://stackoverflow.com/questions/6480053/modifying-functio...