This code snippet will connect to a Box account and loop through all the folders recursively, printing out all the filenames, while highlighting in red files that have a modified_at date older than the specified threshold. In other words, it highlights files that haven't been changed in a while.

Iterate Box folders in Ruby

require 'ruby-box'   			#gem install ruby-box
require 'term/ansicolor' 	#gem install term-ansicolor

include Term::ANSIColor

MODIFIED_AT_CUTOFF = Time.new(2013,7,1)

session = RubyBox::Session.new({
  client_id: "YOUR_CLIENT_ID",
  client_secret: "YOUR_CLIENT_SECRET",
  access_token: "YOUR_DEV_ACCESS_TOKEN"
})

@client = RubyBox::Client.new(session)

def load_folder(folder, path_prefix="/")
	path = "#{path_prefix}#{folder.name}"
	puts path

	files = folder.files(nil,1000,0,['name','modified_at'])
	files.each do |f|
		output = "--> #{f.name}"
		puts f.modified_at < MODIFIED_AT_CUTOFF ? red(output) : output
	end

	subFolders = folder.folders
	subFolders.each do |f|
		load_folder(f,"#{path}/")
	end
end

load_folder @client.root_folder