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Groups > comp.lang.javascript > #39745
| From | John G Harris <niam@jghnorth.org.uk.invalid> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: input/output parameters |
| Date | 2021-03-23 10:44 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <3lhj5g1ik54eu692ith8rt45m94b3llujv@4ax.com> (permalink) |
| References | (4 earlier) <60513800$0$10507$e4fe514c@newszilla.xs4all.nl> <q7l45g9541br60i0pc48r6t4p7s0jidbct@4ax.com> <605286c0$0$16160$e4fe514c@newszilla.xs4all.nl> <nh575gdu0pq0jn8vs306thulcqnsm8d6hb@4ax.com> <6057d929$0$5333$e4fe514c@newszilla.xs4all.nl> |
On Mon, 22 Mar 2021 00:39:21 +0100, Silvio <silvio@internet.com> wrote: >On 3/18/21 7:04 PM, John G Harris wrote: >> >> You distinguish between Inner Out parameters and Outer Out parameters. >> Fair enough. It's worth remembering that both are forbidden in pure FP >> languages, as it is in C++ for constant reference parameters. >> >> John >> > >Do not forget that C++ const pointers/references fail to provide two-way >guarantees about immutability. When you hand out a const >pointer/reference you can rely on the referenced data not being altered >through that pointer/reference. But the code that is handed the >reference can not make the same assumption. At any time can the data >referenced by their const pointer/reference be modified. If the argument given to the function can change while the function is using it then you have a data race problem. The cure is a lock, or a transaction, or similar. >As such const >pointers/references are of limited use for safe data sharing in complex >scenarios. A const ref parameter has nothing to do with race conditions. It's to do with the caller needing to guarantee that its invariants will be preserved while not wanting to copy a large data structure such as a long string or a tree. >Only truly (observably) immutable objects (either atomic ones like >integers Boy, are you going to have a nasty surprise one day. Or do you mean variables built into ROM or Read-Only VM segments ? >or strings or compound ones like arrays, lists, maps etc) can >provide such guarantees. Even more so. John
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input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-13 15:32 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-13 15:16 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-14 18:51 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-14 16:15 +0000
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-14 18:31 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-14 22:27 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-14 23:44 +0000
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-15 06:41 -0700
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-14 22:17 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-14 23:28 +0000
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-15 06:39 -0700
Re: input/output parameters Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-03-14 22:32 +0000
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-15 06:36 -0700
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-20 14:49 +0300
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 11:59 -0700
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 13:07 -0700
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-20 19:29 +0000
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-20 20:35 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-15 00:27 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-14 23:51 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-20 14:56 +0300
Re: input/output parameters Jon Ribbens <jon+usenet@unequivocal.eu> - 2021-03-20 15:08 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-21 15:16 +0300
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-21 08:46 -0700
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-04-10 14:54 +0300
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 12:05 -0700
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-21 15:58 +0300
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-15 06:43 -0700
Re: input/output parameters Silvio <silvio@internet.com> - 2021-03-15 18:01 +0100
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-16 18:06 +0000
Re: input/output parameters Silvio <silvio@internet.com> - 2021-03-16 23:58 +0100
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-17 19:14 +0000
Re: input/output parameters Silvio <silvio@internet.com> - 2021-03-17 23:46 +0100
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-18 18:04 +0000
Re: input/output parameters Silvio <silvio@internet.com> - 2021-03-22 00:39 +0100
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-23 10:44 +0000
Re: input/output parameters Silvio <silvio@internet.com> - 2021-03-30 00:33 +0200
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-31 19:53 +0100
Re: input/output parameters Silvio <silvio@internet.com> - 2021-04-01 01:17 +0200
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-04-01 18:02 +0100
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-20 15:50 +0300
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-20 18:52 +0000
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-21 17:35 +0300
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-21 08:50 -0700
Re: input/output parameters Anton Shepelev <anton.txt@gmail.com> - 2021-03-21 19:31 +0300
Re: input/output parameters John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-21 19:27 +0000
Re: input/output parameters "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 13:02 -0700
Re: input/output parameters Postiljon Petskin <yyyyyyyyyyyywwwww@zohomail.eu> - 2023-04-22 08:47 -0700
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