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| References | (3 earlier) <mailman.252.1443578914.28679.python-list@python.org> <mugaov$79k$1@speranza.aioe.org> <muh0nf$jr0$1@reader1.panix.com> <87si5v3hpx.fsf@elektro.pacujo.net> <muhg4j$70q$1@speranza.aioe.org> |
|---|---|
| From | Ian Kelly <ian.g.kelly@gmail.com> |
| Date | 2015-09-30 14:46 -0600 |
| Subject | Re: Check if a given value is out of certain range |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.284.1443683939.28679.python-list@python.org> (permalink) |
On Wed, Sep 30, 2015 at 2:19 PM, alister <alister.nospam.ware@ntlworld.com> wrote: > On Wed, 30 Sep 2015 21:06:02 +0300, Marko Rauhamaa wrote: > >> Grant Edwards <invalid@invalid.invalid>: >> >>> not (0 <= x <= 10) (I) >>> [...] >>> (x < 0) or (x > 10) (II) >>> [...] >>> IMO, (I) is _more_ readable than (II) >> >> IMO, they're equally readable (except that you should drop the redundant >> parentheses from (II)). >> >> >> Marko > > both are correct > the problem with 1 is the human brain is not particularity good with > negatives*. > to do not (some function) you first of all have to work out some function > & then invert it, a computer does this without difficulty the human brain > gets confused which is why I personally consider ii is more readable > (YMMV especially if you are working with Boolean maths regularly) this > example is relatively simple as things get more complex they become more > error prone error. To me, the negative of one condition (is x in this range) is more easily processable than the disjunction of two conditions that together compose the real, more easily understood condition (is x outside this range). I find it preferable to avoid nested conditions, not negated conditions, and (II) has more nesting than (I). Thought mirrors language. In English, we typically would say "x is not between 0 and 10", not "x is either less than 0 or greater than 10". > *as an example you brain cannot correctly process the following. > > Not (think of your left toe) > > you are now thinking about it aren't you? No, it made me think about thinking. I barely even registered the phrase "left toe", much less thought about that. In any case, that's more an issue of being unable to control what you're thinking about. If I instruct you, "don't raise your right hand", do you then automatically raise your right hand?
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Re: Check if a given value is out of certain range Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-09-29 16:48 +0000
Re: Check if a given value is out of certain range Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-09-29 21:32 +0100
Re: Check if a given value is out of certain range sohcahtoa82@gmail.com - 2015-09-30 11:31 -0700
Re: Check if a given value is out of certain range Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-09-30 23:31 +0100
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-02 04:18 +1000
Re: Check if a given value is out of certain range John Gordon <gordon@panix.com> - 2015-10-01 18:20 +0000
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-02 05:19 +1000
Re: Check if a given value is out of certain range John Gordon <gordon@panix.com> - 2015-10-01 19:41 +0000
Re: Check if a given value is out of certain range Marko Rauhamaa <marko@pacujo.net> - 2015-10-01 22:59 +0300
Re: Check if a given value is out of certain range Emile van Sebille <emile@fenx.com> - 2015-10-01 13:15 -0700
Re: Check if a given value is out of certain range John Gordon <gordon@panix.com> - 2015-10-01 21:45 +0000
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-01 16:03 -0600
Re: Check if a given value is out of certain range Chris Kaynor <ckaynor@zindagigames.com> - 2015-10-01 15:48 -0700
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-01 16:01 -0600
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-03 20:29 +1000
Re: Check if a given value is out of certain range Bartc <bc@freeuk.com> - 2015-10-03 11:48 +0100
Re: Check if a given value is out of certain range Laura Creighton <lac@openend.se> - 2015-10-03 14:12 +0200
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-03 23:51 +1000
Re: Check if a given value is out of certain range wxjmfauth@gmail.com - 2015-10-03 07:19 -0700
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-05 00:47 +1100
Re: Check if a given value is out of certain range Rustom Mody <rustompmody@gmail.com> - 2015-10-04 19:28 -0700
Re: Check if a given value is out of certain range Rustom Mody <rustompmody@gmail.com> - 2015-10-04 19:32 -0700
Re: Check if a given value is out of certain range Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-10-03 11:49 -0400
Re: Check if a given value is out of certain range Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-10-02 00:34 +0100
Re: Check if a given value is out of certain range Michiel Overtoom <motoom@xs4all.nl> - 2015-10-05 10:18 +0200
Re: Check if a given value is out of certain range Jussi Piitulainen <harvesting@makes.email.invalid> - 2015-10-05 13:08 +0300
Re: Check if a given value is out of certain range Marko Rauhamaa <marko@pacujo.net> - 2015-10-05 14:42 +0300
Re: Check if a given value is out of certain range Chris Angelico <rosuav@gmail.com> - 2015-10-06 00:10 +1100
Re: Check if a given value is out of certain range Marko Rauhamaa <marko@pacujo.net> - 2015-10-05 16:25 +0300
Re: Check if a given value is out of certain range Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-10-05 10:19 +0100
Re: Check if a given value is out of certain range Random832 <random832@fastmail.com> - 2015-09-29 17:04 -0400
Re: Check if a given value is out of certain range Luca Menegotto <otlucaDELETE@DELETEyahoo.it> - 2015-09-30 07:57 +0200
Re: Check if a given value is out of certain range Emile van Sebille <emile@fenx.com> - 2015-09-29 14:07 -0700
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-29 15:07 -0600
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-09-30 11:55 +1000
Re: Check if a given value is out of certain range Random832 <random832@fastmail.com> - 2015-09-29 23:08 -0400
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-09-30 13:14 +1000
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-29 23:54 -0600
Re: Check if a given value is out of certain range Tim Chase <python.list@tim.thechases.com> - 2015-09-29 18:44 -0500
Re: Check if a given value is out of certain range alister <alister.nospam.ware@ntlworld.com> - 2015-09-30 09:41 +0000
Re: Check if a given value is out of certain range John Gordon <gordon@panix.com> - 2015-09-30 15:42 +0000
Re: Check if a given value is out of certain range Grant Edwards <invalid@invalid.invalid> - 2015-09-30 15:56 +0000
Re: Check if a given value is out of certain range Marko Rauhamaa <marko@pacujo.net> - 2015-09-30 21:06 +0300
Re: Check if a given value is out of certain range alister <alister.nospam.ware@ntlworld.com> - 2015-09-30 20:19 +0000
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-09-30 14:46 -0600
Re: Check if a given value is out of certain range alister <alister.nospam.ware@ntlworld.com> - 2015-10-01 08:33 +0000
Re: Check if a given value is out of certain range Chris Angelico <rosuav@gmail.com> - 2015-10-01 18:37 +1000
Re: Check if a given value is out of certain range alister <alister.nospam.ware@ntlworld.com> - 2015-10-01 08:48 +0000
Re: Check if a given value is out of certain range Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-01 08:14 -0600
Re: Check if a given value is out of certain range Steven D'Aprano <steve@pearwood.info> - 2015-10-02 04:59 +1000
Re: Check if a given value is out of certain range Laura Creighton <lac@openend.se> - 2015-10-01 09:40 +0200
Re: Check if a given value is out of certain range Laura Creighton <lac@openend.se> - 2015-10-01 09:58 +0200
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