What's another way of writing this block without using do-end?

Question

How would you write this on the same line or on consecutive lines without do-end?

map.resources :magazines do |magazine| magazine.resources :ads end  

Answer 1

wouldn't using curly braces work?

map.resources :magazines {|magazine| magazine.resources :ads}

Answer 2

Instead of do/end, you could simply use {/}:

map.resources :magazines {|magazine| magazine.resources :ads}