If you can run Ruby 1.9.2 on your Macbook Air 11 or 13 inch. I can go
to an Apple Store except to install Ruby 1.9.2, I will need a password
to do it… (actually, maybe I can just copy the binary of the Ruby
executable and use it there…)
p RUBY_VERSION
p RUBY_DESCRIPTION if defined? RUBY_DESCRIPTION
n = 9_999_999
p n
t = 0; 1.upto(n) {|i| t += i if i%3==0 || i%5==0}; p t
if on a 2.53GHz Intel Core 2 Duo
$ time ruby 1.rb
“1.9.2”
“ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]”
9999999
23333331666668
real 0m1.893s
user 0m1.809s
sys 0m0.012s