From: Just Another Victim of the Ambient Morality <ihatespam@...>
Date: 2008-12-24T04:36:35+09:00
Subject: Integer.step is inclusive?!

    I don't know how to post the output of irb so I'll just have to describe 
it but if I run the following code:

0.upto(10){ |i| puts i }

    ...I will get 11 lines of output.  This iterates eleven times.  Really?!
    Why it does this is obvious.  Integer.upto is inclusive so it includes 
both 0 and 10.  However, am I the only one who thinks this is strange 
behaviour?  I mean, the ususal programming protocol is that the last element 
is not included (half-open sets, if you will) so the number of iterations is 
the difference between numbers.
    Why did Ruby turn out this way?  Thank you...