From: ara.t.howard@...
Date: 2006-12-06T07:21:13+09:00
Subject: Re: Can one use line addresses...to select a portion of file

On Wed, 6 Dec 2006, David Vallner wrote:

>> There is a lesser-known (and usually frowned upon?) feature in Ruby that
>> treats Range notation differently in a "boolean context."
>>
>> IO.foreach(file) do |line| # use this rather that loading the whole file
>>   if line =~ /__McDonalds__/ .. line =~ /__Happy_Meal__/
>>     do_stuff_with line
>>   end
>> end
>>
>
> So -this- is what that does?
>
> Does this do that?

yes.

> Does anyone know what that notation does?

it's a boolean toggle.

well doccumented in pickaxe and every perl book out there - if not somewhat
esoteric.

cheers.

-a
-- 
if you want others to be happy, practice compassion.
if you want to be happy, practice compassion.  -- the dalai lama