From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-10-26T06:00:22+09:00
Subject: Re: bit count or bit set

2012/10/25 Charles Hixson <charleshixsn@earthlink.net>:
> In Ruby1.9 is there any good way to count the number of on bits in an
> integer (after an & operation)?

number.to_s(2).count('1')? I'm not sure how fast this is going to be,
but might turn out to be faster than a simple while loop.

-- Matma Rex