CODEWITHSUNDEEP
ruby
Ninja2k
Ninja2k

Reputation: 879

How can I check if a list of folders exist in Ruby?

I am trying to find a matching list of folders on my C:/ drive and then execute some code but its not working as expected.

I can do it fine with a single folder but not sure how to get it working with a list of folders that I want to find.

My code

Dir.glob("C:/*")

directory_list = Array.new

directory_list << "FolderA"
directory_list << "FolderB"

    if Dir.exists?(directory_list)

        puts "Does exist"

    else

        puts "Does not Exist"
    end

The following solution provided a proof of concept for me

 dirs = ["FolderA", "FolderB"] 
 reg = Regexp.union dirs exists, 
 rest = Dir.glob("{B,C,D}:/*").partition{ |path| path =~ reg } 
 puts exists

With thanks to Kyle in the chat room.

Upvotes: 1

Views: 247

Answers (2)

Kyle
Kyle

Reputation: 22268

On windows, the directories are prepended with the drive so you need to:

"C:/FolderB" =~ /FolderB|FolderA/

The code:

dirs = ["FolderA", "Folderb"] 
reg = Regexp.union dirs 
exists, rest = Dir.glob("C:/*").partition{ |path| path =~ reg }
# now you have two arrays, one of directories that exist and the rest

Upvotes: 1

muirbot
muirbot

Reputation: 2081

c_drive = Dir.glob("**/")
%w(FolderA, FolderB).each do |dir|
  if c_drive.include?(dir)
    puts "#{dir} exists"
  else
    puts "#{dir} does not exist"
  end
end

Upvotes: 1

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