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Groups > comp.os.linux.misc > #91141
| Newsgroups | comp.os.linux.misc |
|---|---|
| From | Charlie Gibbs <cgibbs@kltpzyxm.invalid> |
| Subject | Re: OT: Does Computer Science Need Computers? |
| References | (3 earlier) <18d2297d52295ee9$799$1885287$802601b3@news.usenetexpress.com> <4mImS.3$Ehb8.1@fx40.iad> <117i1l1$1rin0$4@dont-email.me> <tR0nS.341$FT1.130@fx10.iad> <ng43poFkdeqU8@mid.individual.net> |
| Message-ID | <Pq5nS.48$4Fj3.37@fx21.iad> (permalink) |
| Date | 2026-09-06 03:51 +0000 |
On 2026-09-06, rbowman <bowman@montana.com> wrote: > On Sat, 05 Sep 2026 22:38:17 GMT, Charlie Gibbs wrote: > >> On 2026-09-05, Lawrence D’Oliveiro <ldo@nz.invalid> wrote: >> >>> On Fri, 04 Sep 2026 23:19:28 GMT, Charlie Gibbs wrote: >>> >>>> In my 50-plus year career, I can count the number of times I've used >>>> floating point on the fingers of one hand. >>> >>> I use floats routinely for times nowadays. Because the most convenient >>> unit for doing most time calculations is seconds and fractions of a >>> second, rather than some arbitrary integer unit like milliseconds or >>> microseconds or whatever. >> >> Let me think about that one. I'll be back in 59.999999 seconds. > > Not 59.9999827? A lot of GIS data points are doubles. That means you have > to mess around calculating epsilons since 59.999999 obviously isn't equal > to 59.9999827. There is an operation called 'snapping'. Essentially > you're saying 'if the two points are 5 feet apart they're the same damn > point.' As the old commercial says, "It takes the worry out of being close." > https://desktop.arcgis.com/en/arcmap/latest/manage-data/editing- > fundamentals/about-snapping.htm > > It's embarrassing when an intended intersection really isn't connected. As > far as shortest path routing is concerned it isn't routable. And that's why I've done so little floating-point work - unless you really need it there are all sorts of potential hassles. Long integer fields with enough implied decimals can save a lot of pain. Packed decimal fields used by the IBM 360 and clones could be up to 31 digits long - enough for just about anything. -- /~\ Charlie Gibbs | In this world there are \ / <cgibbs@kltpzyxm.invalid> | two kinds of people: X I'm really at ac.dekanfrus | 1. Those who can extrapolate / \ if you read it the right way. | from incomplete data.
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OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-04 02:20 +0000
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-04 03:17 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-04 12:56 +0000
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-04 14:44 +0100
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-04 18:48 +0000
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-04 16:00 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-04 23:19 +0000
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-05 00:59 +0000
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-05 01:26 +0000
Intel and IEEE 754 (was: Re: OT: Does Computer Science Need Computers?) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-05 03:06 +0100
Re: Intel and IEEE 754 (was: Re: OT: Does Computer Science Need Computers?) Leroy H <lh@somewhere.net> - 2026-09-05 02:27 +0000
Re: OT: Does Computer Science Need Computers? c186282 <c186282@nnada.net> - 2026-09-05 03:25 -0400
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-05 17:56 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-05 21:30 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-05 22:38 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-06 01:59 +0000
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-06 03:08 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-06 03:51 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-06 06:43 +0000
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-06 02:43 +0000
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-04 18:37 +0000
Re: OT: Does Computer Science Need Computers? c186282 <c186282@nnada.net> - 2026-09-04 21:20 -0400
Re: OT: Does Computer Science Need Computers? Leroy H <lh@somewhere.net> - 2026-09-05 01:40 +0000
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-05 03:46 +0000
Re: OT: Does Computer Science Need Computers? c186282 <c186282@nnada.net> - 2026-09-05 03:36 -0400
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-05 18:09 +0000
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-05 19:23 +0100
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-06 02:49 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-06 03:51 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-04 22:36 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-06 06:50 +0000
Re: OT: Does Computer Science Need Computers? c186282 <c186282@nnada.net> - 2026-09-07 04:14 -0400
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-07 12:05 +0100
Re: OT: Does Computer Science Need Computers? Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-09-07 09:17 -0400
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-07 15:02 +0100
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-07 19:16 +0000
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-07 22:26 +0100
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-08 04:18 +0000
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-08 04:38 +0000
Re: OT: Does Computer Science Need Computers? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-08 05:43 +0000
Re: OT: Does Computer Science Need Computers? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-09 04:25 +0000
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-09 09:35 +0100
Re: OT: Does Computer Science Need Computers? Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-09-07 18:58 -0400
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-08 04:47 +0000
Re: OT: Does Computer Science Need Computers? Rich <rich@example.invalid> - 2026-09-14 17:18 +0000
Re: OT: Does Computer Science Need Computers? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-05 02:50 +0100
Re: OT: Does Computer Science Need Computers? The Natural Philosopher <tnp@invalid.invalid> - 2026-09-05 08:37 +0100
Re: OT: Does Computer Science Need Computers? Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-05 10:20 +0100
Re: OT: Does Computer Science Need Computers? rbowman <bowman@montana.com> - 2026-09-05 18:31 +0000
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