From: Phrogz <phrogz@...>
Date: 2010-07-16T03:30:03+09:00
Subject: Ruby 1.9.1 Array#combination kinda lazy

C:\>type tmp.rb
count = 0
combo = nil
(1..166).to_a.combination(5).each do |c|
  count+= 1; combo = c
end
p count, combo

C:\>ruby -v tmp.rb
ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32]
129462338
[5, 34, 54, 73, 81]

Yeah...no one could possibly need to run more than 129 million
combinations, and...I'm getting kinda tired, so...yeah, let's just
stop here.

WTF?