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Groups > comp.os.linux.misc > #86004

Re: CIDR Calculator

From Lawrence D’Oliveiro <ldo@nz.invalid>
Newsgroups comp.os.linux.misc
Subject Re: CIDR Calculator
Date 2026-04-29 01:59 +0000
Organization A noiseless patient Spider
Message-ID <10srolo$3j987$1@dont-email.me> (permalink)
References <XnsB43B9C55314F7makowiecatnycapdotrE@157.180.91.226> <20260427133111.00001bba@gmail.com>

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On Mon, 27 Apr 2026 13:31:11 -0700, John Ames wrote:

> function powerOfTwo(i as ulong) as Boolean
>   ' Returns true if i is a power of two.

    power_of_two = lambda n : n & n - 1 == 0

    list(enumerate(power_of_two(i) for i in range(17)))

    [(0, True),
     (1, True),
     (2, True),
     (3, False),
     (4, True),
     (5, False),
     (6, False),
     (7, False),
     (8, True),
     (9, False),
     (10, False),
     (11, False),
     (12, False),
     (13, False),
     (14, False),
     (15, False),
     (16, True)]

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Thread

CIDR Calculator Joe Makowiec <makowiec@invalid.invalid> - 2026-04-27 19:22 +0000
  Re: CIDR Calculator John Ames <commodorejohn@gmail.com> - 2026-04-27 13:31 -0700
    Re: CIDR Calculator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-29 01:59 +0000
  Re: CIDR Calculator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-27 22:35 +0000
  Re: CIDR Calculator Marc Haber <mh+usenetspam2616@zugschl.us> - 2026-04-28 07:49 +0200
    Re: CIDR Calculator Rene Kita <mail@rkta.de> - 2026-04-29 07:09 +0000
      Re: CIDR Calculator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-29 08:05 +0000
  Re: CIDR Calculator Fritz Wuehler <fritz@spamexpire-202604.rodent.frell.theremailer.net> - 2026-04-29 00:08 +0200
  Re: CIDR Calculator 🇵🇱Jacek Marcin Jaworski🇵🇱 <jmj@energokod.gda.pl> - 2026-04-29 07:10 +0200
    Re: CIDR Calculator 🇵🇱Jacek Marcin Jaworski🇵🇱 <jmj@energokod.gda.pl> - 2026-04-29 23:52 +0200

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