My first Ruby script: finding duplicate photo files

I've started on the large task of organizing my digital photo files. My disorganization stems from a couple of things. First, when I began using a digital camera, I used iPhoto. I don't really use it now. But I've noticed that iPhoto makes some duplicate files. Second, I think I have duplicate files from backups and from migrating from old machines to new ones. Compounded with the fact that most of the files begin with DSCN or DCP, it is a mess. So, to help me get started, I thought I would write a script that would create a report of any duplicate files and their locations. Also, since I'm about one third of the way through the Everyday Scripting with Ruby by Brian Marick, I know just enough to be dangerous. After a couple of evenings of blundering my way through this, I finally have my first Ruby script.

	require 'find'
	argv = ARGV.empty? ? %w{.} : ARGV
	file_counts = Hash.new(0)
	files = Array.new
	Find.find(*argv) do |fullname|
	# looking for image files only
	next unless fullname =~ /\.(JPEG|JPG|GIF|MOV)$/i
	file = File.basename(fullname).downcase
	dir = File.dirname(fullname)
	files.push([file,dir])
	file_counts[file.downcase] += 1
	end
	file_counts.each { |file, count|
	if count > 1 then
	# print the number of occurences and the file name
	printf("%5d %s\n", count, file)
	# since assoc only returns the first occurence, we print it
	# then delete it so we can find the next occurence
	while (a = files.assoc(file))
	# print each directory name
	printf("\t %s\n", a[1])
	files.delete(a)
	end
	end
	}

view raw find_duplicate_photos.rb hosted with ❤ by GitHub

To call this script, you can pass in a list of directories, or it will default to the current directory.