Le 20 septembre 20:17, Joel VanderWerf a ñÄrit : > a.each_run(proc {|prev, s| prev.succ == s}) do |run| There's a catch with succ : >> "S9".succ => "T0" Definitely not what I want ! :) Fred -- You ask me if I've known love And what it's like to sing songs in the rain Well, I've seen love come And I've seen it shot down I've seen it die in vain Shot down in a blaze of glory (Bon Jovi, Blaze of Glory)