From: Timothy Hunter <TimHunter@...>
Date: 2006-11-26T08:53:00+09:00
Subject: Re: ruby and list comprehension

Brad Tilley wrote:
> In Python, I can do this to arrays:
>
> added = [x for x in new_data if x not in old_data]
> removed = [x for x in old_data if x not in new_data]
> same = [x for x in new_data if x in old_data]
>
> I believe this is known as list comprehension in Python. How is this done in
> Ruby?
>
> Thanks,
> Brad
>
>   
This question comes up from time to time. You can search the archives of 
comp.lang.ruby on Google Groups for "list comprehension" to find the 
previous threads on this topic.

http://groups.google.com/group/comp.lang.ruby/search?group=comp.lang.ruby&q=list+comprehension&qt_g=1&searchnow=Search+this+group