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Groups > comp.arch.embedded > #26351
| From | Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Dimension of a matrix |
| Date | 2017-03-30 18:07 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <objhgl$rv2$1@dont-email.me> (permalink) |
| References | (7 earlier) <ob949v$ub1$1@dont-email.me> <obhjhm$i1p$1@dont-email.me> <obhjtu$i7n$1@dont-email.me> <87k277cw3c.fsf@nightsong.com> <obid4h$78q$2@dont-email.me> |
On 2017-03-30, David Brown <david.brown@hesbynett.no> wrote: > On 30/03/17 04:55, Paul Rubin wrote: >> Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> writes: >>> If I had my way, integers would be unsigned by default in all of today's >>> programming languages and you would have to ask for a signed integer if >>> you wanted one. >> >> What happens if you subtract 3 from 2? Are these unsigneds supposed to >> represent natural numbers, so you throw an exception if you get a >> negative result? Or are you saying all languages should use twos >> complement wraparound arithmetic including the ones that have exact >> integers now? >> If you think your variable might go negative, you use a signed integer otherwise you use an unsigned integer. > > Presumably he uses signed integers in situations where it makes sense to > subtract 3 from 2, and in other situations he simply does not subtract 3 > from 2. Making your "noOfOranges" variable signed does not let you > subtract 3 oranges from 2 oranges. > Exactly. You pick the data type which most closely models the problem you are trying to solve. Picking a signed integer when you know your data is always going to be positive is not a good match if unsigned integers are available in your chosen language. In my code (both work and hobbyist) I use unsigned values vastly more frequently than I do signed values and another reason is that signed integers have caused security issues in the past. Simon. -- Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP Microsoft: Bringing you 1980s technology to a 21st century world
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Dimension of a matrix Tim Wescott <seemywebsite@myfooter.really> - 2017-03-23 18:17 -0500
Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-23 23:21 -0700
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-24 09:18 +0100
Type-safety and C++, was: Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-24 18:24 +0000
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-24 19:32 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Stefan Reuther <stefan.news@arcor.de> - 2017-03-25 09:59 +0100
Re: Type-safety and C++, was: Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 13:08 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-25 01:57 +0100
Re: Type-safety and C++, was: Re: Dimension of a matrix Clifford Heath <no.spam@please.net> - 2017-03-25 18:34 +1100
Re: Type-safety and C++, was: Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-26 23:53 +0000
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-27 09:51 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Clifford Heath <no.spam@please.net> - 2017-03-27 20:19 +1100
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-27 12:17 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-25 09:20 -0700
Re: Type-safety and C++, was: Re: Dimension of a matrix George Neuner <gneuner2@comcast.net> - 2017-03-24 23:14 -0400
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-25 11:07 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix George Neuner <gneuner2@comcast.net> - 2017-03-26 05:45 -0400
Re: Type-safety and C++, was: Re: Dimension of a matrix Wouter van Ooijen <wouter@voti.nl> - 2017-03-26 13:14 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-26 11:08 -0700
Re: Type-safety and C++, was: Re: Dimension of a matrix Wouter van Ooijen <wouter@voti.nl> - 2017-03-26 20:24 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-26 15:16 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-27 00:09 +0000
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <seemywebsite@myfooter.really> - 2017-03-26 19:43 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-03-27 16:57 +0100
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-27 11:53 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-27 22:04 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <seemywebsite@myfooter.really> - 2017-03-27 18:32 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Clifford Heath <no.spam@please.net> - 2017-03-28 11:03 +1100
Re: Type-safety and C++, was: Re: Dimension of a matrix Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-03-27 22:07 +0100
Re: Type-safety and C++, was: Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-27 23:42 -0700
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-28 09:22 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-28 00:42 -0700
Re: Type-safety and C++, was: Re: Dimension of a matrix Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-03-28 09:07 +0100
Re: Type-safety and C++, was: Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-28 19:34 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-29 11:39 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-28 19:29 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-29 10:31 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-30 00:23 +0000
Re: Type-safety and C++, was: Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-29 19:31 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix Phil Martel <pomartel@comcast.net> - 2017-03-30 11:51 -0400
Re: Type-safety and C++, was: Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-30 19:16 -0500
Re: Type-safety and C++, was: Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-31 09:21 +0200
Re: Type-safety and C++, was: Re: Dimension of a matrix Tim Wescott <seemywebsite@myfooter.really> - 2017-03-28 14:19 -0500
Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-24 11:05 -0500
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-24 17:33 +0100
Re: Dimension of a matrix Tim Wescott <tim@seemywebsite.com> - 2017-03-24 12:09 -0500
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 13:09 -0500
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 13:05 -0500
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-24 09:20 +0100
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 13:12 -0500
Re: Dimension of a matrix Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-03-25 20:08 +0100
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 15:17 -0500
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-26 17:32 +0200
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-26 11:55 -0500
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-26 21:23 +0200
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-29 19:36 -0500
Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-30 00:36 +0000
Re: Dimension of a matrix Paul Rubin <no.email@nospam.invalid> - 2017-03-29 19:55 -0700
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-30 09:49 +0200
Re: Dimension of a matrix Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2017-03-30 18:07 +0000
Re: Dimension of a matrix David Brown <david.brown@hesbynett.no> - 2017-03-30 09:47 +0200
Re: Dimension of a matrix Wouter van Ooijen <wouter@voti.nl> - 2017-03-25 19:08 +0100
Re: Dimension of a matrix Les Cargill <lcargill99@comcast.com> - 2017-03-25 15:21 -0500
Re: Dimension of a matrix Wouter van Ooijen <wouter@voti.nl> - 2017-03-26 14:43 +0200
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