gistfile1.rb

require 'fileutils'

new_path = '/home/valachi/ruby/new_uploads'
old_path = '/home/valachi/ruby/uploads'

[new_path, old_path].each do |path|
  Dir.mkdir(path) unless Dir.exists?(path)
  23.times do |i|
    Dir.mkdir("#{path}/#{i}") unless File.exists?("#{path}/#{i}")
  end
end

Dir.foreach(new_path) do |folder|
  next if folder == '.' || folder == '..'
  new_file = File.join(new_path, "/#{folder}/#{folder}.txt")
  unless File.exists?(new_file)
    File.open(new_file, 'w') {}
  end
end

folders = []
Dir.foreach(old_path) do |folder|
  next if folder == '.' || folder == '..'
  folders << folder
  FileUtils.rm_rf(old_path + "/#{folder}")
end

slice_value = (folders.size.to_f / 4).round

folders.each_slice(slice_value) do |folders|
  folders.each do |folder|
    `ln -s "#{new_path}/#{folder}" "#{old_path}/#{folder}"`
  end
end