gistfile1.rb

require 'FileUtils'

homepath = File.expand_path "~"
desktop_files = Dir.entries homepath + "/Desktop"
desktop_files.to_a
screen_shot_folder = homepath + "/Desktop/Screenshots"

Dir::mkdir(screen_shot_folder) unless File.exists?(screen_shot_folder)

desktop_files.each {
  |the_file|
	if the_file.include? "Screen Shot"
		old_file = homepath + "/Desktop/" + the_file
		new_file = screen_shot_folder + "/" + the_file
		
		FileUtils.mv(old_file,new_file, :force => true)
	end
}