ruby_procs

http://augustl.com/blog/2008/procs_blocks_and_anonymous_functions/

Procs are useful code organization tools. Let’s say that you want to calculate the running time for a few code snippets, in order to benchmark them. To do this elegantly, you want to be able to call a method and pass some code to it, and have the execution time returned.

Here’s how you can use procs to do just that:

def time(a_proc)
  start = Time.now
  a_proc.call
  puts Time.now - start
end
 
time(Proc.new { code_here })
time(Proc.new { more_code_here })