Dante Regis wrote:

> It was something like   [0, 1, 2].each {  } , with some char inside the
> brackets, like &, but I can't remember it. anyone knows how to use it?

If I guess correctly, ActiveSupport has a cute little tweak that permits 
this:

p (0..10).to_a.map(&:to_s)

Any place you can write {|x| x.y}, you can shorten that to (&:y). This works 
great with ActiveRecord, to convert a list of database records into a list 
of one of its fields:

 p User.find(:all).map(&:name)

-- 
  Phlip