From: Peter Bailey <lists@...>
Date: 2013-01-10T01:23:41+09:00
Subject: Re: One liner for filenames

"Jesús Gabriel y Galán" <jgabrielygalan@gmail.com> wrote in post 
#1091613:
> On Wed, Jan 9, 2013 at 5:00 PM, Peter Bailey <lists@ruby-forum.com>
> wrote:
>>>> ruby -r pathname -e 'Pathname.glob("*[^1].png").each(&:delete)'
>>>
>>> Careful, as this skips also filename_11.png, filename_21.png, etc.
>>> Building on this:
>>>
>>> ruby -r pathname -e 'Pathname.glob("*_{[^1],??}.png").each(&:delete)'
>>>
>>> Jesus.
>>
>> Excellent. Thanks. Hans is right, though. Dir.glob is unsorted. Is that
>> a problem here?
>
> No, because here we are using the glob facility to do all the
> filtering. In the other solution, there was the array returned from
> the glob that was being filtered, and so the order was important for
> the solution that removed the first entry in the array.
>
> Jesus.

Beautiful. Thanks a lot.

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