Examine Folder Contents?


#1

Hi all

I’d like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array…

How do I do this? Thanks a lot for help. :slight_smile:
Joshua


#2

On 1 Apr 2006, at 13:41, Joshua M. wrote:

Hi all

I’d like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array…

How do I do this? Thanks a lot for help. :slight_smile:
Joshua

You’ll want the class Dir, and the class method glob.
png_files = Dir.glob(File.join(path_of_folder, ‘*.png’))

Cheers,
Benj


#3

You’ll want the class Dir, and the class method glob.
png_files = Dir.glob(File.join(path_of_folder, ‘*.png’))

Cheers,
Benj

Thank you so far. I’m using this in Ruby on Rails and tried the
following:

@images = Dir.glob(’/images/content/parties/photo_galleries/1/’,
‘*.jpg’)

Sadly this delivers me an empty array, but there are about 20 jpg files
in this folder… :-/

Thanks for help… Josh


#4

Ups sorry, it doesn’t return an empty array but the following error:

cannot convert String into Integer


#5

On Apr 1, 2006, at 8:06 AM, Joshua M. wrote:

@images = Dir.glob(’/images/content/parties/photo_galleries/1/’,
‘*.jpg’)

Try:

 @images = Dir.glob('/images/content/parties/photo_galleries/1/

*.jpg’)

–Steve


#6

Joshua M. schrieb:

I’d like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array…

This is part of a RHTML file for showing all JPEG files as a list:

<% bilder = Dir["*.jpeg"] %>

This is part of a RHTML file for randomly show a picture from a
picture list like above:

<% bilder = Dir["…/*.jpeg"] %>

Daniel


#7

Thank you all, guys!

I have now the following array:

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-01.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-02.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-03.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-04.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-05.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-06.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-07.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-08.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-09.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-10.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-11.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-12.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-13.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-14.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-15.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-16.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-17.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-18.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-19.jpg

/Users/Josh/Webwork/PsyGuide.org/public/…/config/…/public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-20.jpg

Is there a way to clean the path (I mean the unnecessary “/…”)?

Thanks. :slight_smile:


#8

This is operating on the actual filesystem, so you have to use real
paths, not the URI for the web application. Try this:

File.join(RAILS_ROOT, ‘public’)

@images = Dir.glob(File.join(RAILS_ROOT,
‘public/images/content/parties/photo_galleries/1/’), ‘*.jpg’)


#9

Oh, and how do I cut the RAILS_ROOT away again? So I can use the paths
in the RHTML file again…? :slight_smile:


#10

You might want to look at Pathname
(http://ruby-doc.org/stdlib/libdoc/pathname/rdoc/classes/Pathname.html)

It wraps alot of the File related libs into a nice package

Cheers


#11

On Wed, 5 Apr 2006, Joshua M. wrote:

Is there a way to clean the path (I mean the unnecessary “/…”)?

list_of_paths.map!{|path| File.expand_path path}

-a