From: Todd Benson <caduceass@...>
Date: 2009-04-30T04:21:54+09:00
Subject: Re: Finding Matches in Array of Classes

On Wed, Apr 29, 2009 at 2:03 PM, Rob Redmon <rob.webinator@gmail.com> wrote:
>
> I have an ActiveRecord find result.  An element's contents look like:
>
> irb(main):090:0> results[0]
> => #<InventoryHour id: 47475, observation_time: "2008-01-01 00:00:00",
> station_id: 6, extension_id: 22, disk: 4, archive: 0, updated_on:
> "2009-04-15 15:57:16">
>
> The class of "observation_time" is:
> results[0].observation_time.class
> => Time
>
>
> What I'd like to do is find those elements which match on a particular
> range of "observation_time".  I'm used to Matlab and IDL programming
> where one just does something like this:
>
> indices = where( results.observation_time >= "2008-1-1" and
> results.observation_time < "2009-1-1" )
>
> What's the ruby way?  Obviously, I can't use Array.include? but
> something like that would be nice.

Depends.  This might work (just an example)...

d = Time.now
e = Time.now + 1
f = Time.now + 2
(d..f).include? e
=> true

Todd