Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.javascript > #39637
| From | Anton Shepelev <anton.txt@gmail.com> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: input/output parameters |
| Date | 2021-03-14 18:51 +0300 |
| Organization | A noiseless patient Spider |
| Message-ID | <20210314185124.0bcbab76d172caf076ac3839@gmail.com> (permalink) |
| References | <20210313153232.40fa0c8b0adf07d7e807084d@gmail.com> <slrns4plpr.4fd.jon+usenet@raven.unequivocal.eu> |
Jon Ribbens:
> You should probably try and program in the style of the
> language you are using, rather than try and force the
> langauge you are using to work in the style of a different
> language.
What is the JavaScript style of implementing TryParse() and
TryGetValue()?--
TryParse: https://docs.microsoft.com/en-us/dotnet/api/system.int32.tryparse
TryGetValue: https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2.trygetvalue
The whole point of those and similar functions is their
usefulness as the condition of `if' and `while' statements,
e.g.:
while( read_next( stream, out element )
{ // process the element
}
What alternative(s) does JavaScript propose?
> But you can do this, for example:
>
> function multiplyAndDivide (data) {
> data.multiplied = data.a * data.b
> data.divided = data.a / data.b
> }
>
> const values = { a: 2, b: 4 }
> multiplyAndDivide(values)
> console.log(values.multiplied, values.divided)
In this example, both calculated values are part of the
result of a successful calcualtion, so it is not analogous
to my case, where I would be forced to return, say, an error
flag, the error text, and a numerical result illogically
grouped together in an object. Your example, on the other
hand, is all right.
The major advantage of output variables is that they let a
function modify the values of the caller's scalar varables
in a transparent way. Passing an object to modify some of
its fields is not as transparent, whereas the need to
"upack" the object's properties back into normal variables
is quite inconvenient.
--
() ascii ribbon campaign -- against html e-mail
/\ http://preview.tinyurl.com/qcy6mjc [archived]
Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
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
csiph-web