From: Rob Biedenharn <Rob@...>
Date: 2009-07-24T05:00:38+09:00
Subject: Re: Dir.entries, output showing nils

On Jul 23, 2009, at 12:37 PM, Mmcolli00 Mom wrote:
> Rob Biedenharn wrote:
>> On Jul 23, 2009, at 11:42 AM, Mmcolli00 Mom wrote:
>>> AUR123443.txt
>>>
>>> #below shows nil for all files and then shows the registereduser  
>>> file.
>>> puts RegisteredUser
>>>
>>> end
>>
>> First, Capitalized names in Ruby are constants. You probably want a
>> local_variable instead.
>>
>> I'm not sure from your example and question what you really want, but
>> here are some options:
>>
>> # An array of filenames that start with AU
>> files = Dir.glob("AU*")   # or Dir["AU*"]
>>
>> # Split one array into a pair of arrays (in another array) based on a
>> condition:
>> files.partition {|filename| filename[2..2] == "R"}
>>
>> (which is Enumerable#partition)
>>
>> Does that help?
>>
>
> My project consists of me reading the contents of a folder. The folder
> will have 5 files for testing. The files are named as such...
>
> AUR234_somename.txt
> PUR233_somename.txt..
>
> If a file starts with AU I know that this file fits the Aero group and
> the third letter being 'R' tells me if it is registered. If a file  
> fits
> the condition. I want to store that filename so that other programs  
> can
> peform I/O tests on it. The 5 files will be replaced occasionally but
> with the same strict naming conventions. Each file will be meant for a
> different type of test. The number represent a count that will be
> validated later in the test as well.
>
> Good tip- I will apply lowercase letters to the filenames. I don't  
> think
> the partition will help in this case though. Thanks -MC

Ah, much better description of your problem.

Dir["directory/*"] will include the "directory/" part in the returned  
name. (didn't I see this in your code? anyway...)

Dir["[Aa][Uu][Rr]*"] gives you exactly these files

You could also:
   Dir["[Aa][Uu]*"].partition {|file| file =~ /\A..r/i }
to get files where the third character is R or r.

In a Regexp, /\A/ is the beginning of the string, /./ is any  
character, and the /r/i is an r matched insensitive to case (that's  
the i flag at the end).

-Rob

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