From: Aldric Giacomoni <aldric@...>
Date: 2009-11-26T01:29:47+09:00
Subject: Re: Ruby internals & other questions

Ralph Shnelvar wrote:
> 
> y=0
> 1_000_000.times {|x| y+=x}

y = (1..1_000_000).inject { |a, b| a + b }

More idiomatic, though maybe yours is easier to read at first.
If you're not sure what it does, read the rdoc, then ask us questions 
(rdocs aren't -always- crystal clear).
To compare which one is faster, a google search with the keywords : 
"ruby, benchmark, bmbm" will help.

To time the code, the simplest method (though not the most elegant) is 
to do this:
#beginning of code
t0 = Time.now
#all of code
puts "This took #{Time.now - t0} seconds."


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