:act
require 'date'
require 'pp'
# object-functions first
def m; :milch; end
def s; :saft; end
def k; :kaese; end
def t; :tabak; end
def p; :papers; end
def f; :filter; end
# simple working
ek = [[m,s,k],[t,p,f]]
# accum
(ek_coll ||= []) << [DateTime.now, ek]; puts ek_coll.length # timestamped
pp ek_coll; 1