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Re: Arithmetic trivia (Was: [ANN] KornShell 93u+m 1.0.0-beta.2)

From Janis Papanagnou <janis_papanagnou@hotmail.com>
Newsgroups comp.unix.shell
Subject Re: Arithmetic trivia (Was: [ANN] KornShell 93u+m 1.0.0-beta.2)
Date 2021-12-17 21:39 +0100
Organization A noiseless patient Spider
Message-ID <spishe$5s9$1@dont-email.me> (permalink)
References <j22f1cFh5m2U1@mid.individual.net> <sphijs$ejq$1@dont-email.me> <j236fkFldviU1@mid.individual.net> <JGDDG6C28aBHRfrQ6@bongo-ra.co> <spi28d$1vkeo$1@news.xmission.com>

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On 17.12.2021 14:10, Kenny McCormack wrote:
> 
> If you want to use 255 (i.e., hex FF), then you have to use an 'and'
> operator.
> i.e., either of:
> 12345 % 256
> or:
> 12345 & 255

Yep, just a typical well known careless mistake. In the same vein
as implementing the integer division
  x div 2   # x/2
by
  x shr 1   # x>>1
but writing by accident x>>2 (a careless mistake I made 35 years
ago in a test and still recall); a favorable reader will understand
the intention, but a computer will merciless execute it.

Janis

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Thread

[ANN] KornShell 93u+m 1.0.0-beta.2 Martijn Dekker <martijn@inlv.demon.nl> - 2021-12-17 04:38 +0100
  Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Janis Papanagnou <janis_papanagnou@hotmail.com> - 2021-12-17 09:43 +0100
    Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Martijn Dekker <martijn@inlv.demon.nl> - 2021-12-17 11:18 +0100
      Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Spiros Bousbouras <spibou@gmail.com> - 2021-12-17 12:50 +0000
        Arithmetic trivia (Was: [ANN] KornShell 93u+m 1.0.0-beta.2) gazelle@shell.xmission.com (Kenny McCormack) - 2021-12-17 13:10 +0000
          Re: Arithmetic trivia (Was: [ANN] KornShell 93u+m 1.0.0-beta.2) Janis Papanagnou <janis_papanagnou@hotmail.com> - 2021-12-17 21:39 +0100
        Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Martijn Dekker <martijn@inlv.demon.nl> - 2021-12-17 19:58 +0000
  Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Janis Papanagnou <janis_papanagnou@hotmail.com> - 2021-12-18 15:07 +0100
    Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Martijn Dekker <martijn@inlv.demon.nl> - 2021-12-19 21:00 +0000
      Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Martijn Dekker <martijn@inlv.demon.nl> - 2021-12-21 19:12 +0000
      Re: [ANN] KornShell 93u+m 1.0.0-beta.2 Janis Papanagnou <janis_papanagnou@hotmail.com> - 2021-12-24 14:46 +0100

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