aartist:

As I see it, a module would have to give you a way to specify what you're expecting, what you want, and what mapping you want. I don't see how doing that in a general purpose way is going to be any shorter than the perl code that just does the task. Also, if you do anything other than straight mapping (i.e., computations, etc.) then you're making the interface for a data structure transformation module even more complex. I'm quite willing to be proven wrong, but I don't think I am.

...roboticus

When your only tool is a hammer, all problems look like your thumb.