gistfile1.rb

# View IRB History of this session
#
# irb_history             # return all console commands this session
# irb_history 25          # return last 25 console commands from this session
# irb_history :all        # return all console commands from all sessions
# irb_history :all, 25    # return last 25 console commands 
#
def hist(*args)
  limit = args.last.class == Fixnum ? args.last : MAXHISTSIZE
  puts Readline::HISTORY.entries.split("exit").
        send((args.first == :all ? 'flatten' : 'last'))[0..-2].
        last(limit).join "\n"    
end