Ruby 1.9 introduced more than a few useful methods. I’ve been able to wring
a lot of use out of
Enumerable’s new method
In situations where you’d do something like the following:
array = %w(alpha bravo charlie delta) results =  array.each do |item| results << item.to_sym end results.reverse!
You can do something like this instead:
array = %w(alpha bravo charlie delta) results = array.each_with_object() do |item, results| results << item.to_sym end.reverse
This reduces lines of code while making the source more readable at the same time.