Showing off ruby to a coworker, and I want to emphasize how succinct yet
clear it can be.  So I want to rename all .mp3 files to .temp, or vice versa
in the current directory -- in the shortest LOC *that you would actually write*;
not the "here's a one-liner nobody in their right mind would every write if
they had to maintain it".

Here's my first solution:

Dir.new("./").each do |file|
	if file.match(/mp3$/)
		File.rename(file, file.gsub(/mp3$/, 'temp'))
	elsif file.match(/temp$/)
		File.rename(file, file.gsub(/temp$/, 'mp3'))
	end
end

Note you can NOT do the following, as it renames mp3 to temp,
then immediately renames that same file back to mp3...

Dir.new("./").each do |file|
	File.rename(file, file.gsub(/mp3$/, 'temp')) if file.match(/mp3$/)
	File.rename(file, file.gsub(/temp$/, 'mp3')) if file.match(/temp$/)
end

Any ideas?

-- 
Brock Weaver
[OBC]Technique