From: Simon Schuster <significants@...>
Date: 2007-10-01T05:49:35+09:00
Subject: got a range from an array, but looking for other ways of doing it

a is an array. I'm trying to chop the first and last third off. or,
choose only the middle third. can be a rough third.

a.length                                       # 4808
range = a.length * 0.3                    # 1442.4
range = range.to_i                         # 1442
rangetop = a.length / 2 + range       # 3846
rangebottom = a.length / 2 - range  # 962

a[rangebottom..rangetop].length     # 2885