How can you find the most recently modified folder in a directory using Ruby?

Question

How can you find the most recently modified folder (NOT A FILE) in a directory using Ruby?

Answer 1

Expanding off of sepp2k's answer a bit to add recursively checking all subdirectories for those coming across this:

#!/usr/bin/env ruby
if ARGV.count != 1 then raise RuntimeError, "Usage: newest.rb '/path/to/your dir'" end

Dir.chdir(ARGV[0])
newest_file = Dir.glob("**/").max_by {|f| File.mtime(f)}

if newest_file != nil then
puts newest_file.to_s + " " + File.mtime(newest_file).to_s
else
puts "No subdirectories"
end

and use this instead if you want all files and not just directories:

Dir.glob("**/*")