Lazyの有無に関係ないようですね。 Prelude> :i Control.Monad.State.State type Control.Monad.Trans.State.Lazy.State s = Control.Monad.Trans.State.Lazy.StateT s Data.Functor.Identity.Identity -- Defined in `Control.Monad.Trans.State.Lazy' http…

require File.expand_path(File.dirname(__FILE__) + '/../samples_config') instances = AWS::EC2.new.instances # p instances instances.each { |i| puts i.id + " " + (i.ip_address ? i.ip_address : "") + " " + (i.tags["Name"] ? i.tags["Name"] : "…