require 'active_support'
require 'active_support/core_ext'
Dir.glob('/var/foo/**/*.yml').
select{|f| File.mtime(f) < Time.now - 1.day }.
each{|f| FileUtils.rm(f)}

参考

Tetsu @ironsand

思いついたアイデアをすぐに形にできる能力を身につけたいのでRailsを頑張って習得中。仕事ください。

http://programming.ironsand.net/

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