From: Rob Biedenharn <Rob@...>
Date: 2009-11-26T01:42:41+09:00
Subject: Re: Ruby internals & other questions

On Nov 25, 2009, at 11:29 AM, Aldric Giacomoni wrote:

> 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.
>


...but not equivalent:
y=0
1_000_000.times {|x| y+=x }

y = (0..999_999).inject {|a,b| a+b}

Although I wouldn't necessarily call this use of inject idiomatic.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com