Groups > comp.lang.java.programmer > #22052

Re: refactoring problem

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From	Knute Johnson <nospam@knutejohnson.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: refactoring problem
Date	Sun, 03 Feb 2013 10:20:44 -0800
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On 2/3/2013 10:13 AM, Arne Vajhøj wrote:
> On 2/3/2013 12:54 PM, Joshua Cranmer wrote:
>> On 2/3/2013 8:30 AM, Roedy Green wrote:
>>> I think, why can methods have multiple inputs, but only one output? I
>>> have been thinking that for about 50 years, and it ,seems unlikely to
>>> change soon.
>>
>> The short answer is that grammar makes N-ary arguments easy to express
>> but N-ary returns difficult. Function calls evaluate to a value, so to
>> implement N-ary returns, you have to effectively make tuples first-class
>> values and treat multiple return values as tuple unpacking. In
>> explicitly-typed languages like Java, this would make doing things like
>> initializing multiple values of different types from a multiple-returned
>> value syntactically annoying.
>
> (int a; double b; String c) = multiReturnValueMethod();
>
> sure does look funky!
>
> Arne
>
>

Perl does it.

-- 

Knute Johnson

Thread

refactoring problem Roedy Green <see_website@mindprod.com.invalid> - 2013-02-03 06:30 -0800
  Re: refactoring problem Martin Gregorie <martin@address-in-sig.invalid> - 2013-02-03 16:23 +0000
  Re: refactoring problem Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-02-03 12:27 -0400
    Re: refactoring problem Roedy Green <see_website@mindprod.com.invalid> - 2013-02-03 12:35 -0800
      Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-03 15:37 -0500
    Re: refactoring problem Leif Roar Moldskred <leifm@dimnakorr.com> - 2013-02-03 15:21 -0600
      Re: refactoring problem Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-02-03 17:38 -0400
      Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-03 16:46 -0500
    Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-03 14:36 -0800
  Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-03 11:34 -0500
  Re: refactoring problem Joshua Cranmer <Pidgeot18@verizon.invalid> - 2013-02-03 11:54 -0600
    Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-03 13:13 -0500
      Re: refactoring problem Knute Johnson <nospam@knutejohnson.com> - 2013-02-03 10:20 -0800
        Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-03 13:32 -0500
          Re: refactoring problem Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2013-02-03 10:50 -0800
            Re: refactoring problem Robert Klemme <shortcutter@googlemail.com> - 2013-02-03 21:38 +0100
            Re: refactoring problem "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-02-04 08:11 +0000
              Re: refactoring problem Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2013-02-04 03:56 -0800
      Re: refactoring problem Silvio <silvio@internet.com> - 2013-02-04 13:21 +0100
        Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-04 12:35 -0800
          Re: refactoring problem Silvio <silvio@internet.com> - 2013-02-04 22:15 +0100
            Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-04 13:49 -0800
              Re: refactoring problem Silvio <silvio@internet.com> - 2013-02-04 23:51 +0100
            Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-04 13:53 -0800
              Re: refactoring problem Silvio <silvio@internet.com> - 2013-02-04 23:48 +0100
                Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-04 17:08 -0800
                Re: refactoring problem Silvio <silvio@internet.com> - 2013-02-05 10:07 +0100
                Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-05 13:13 -0800
                Re: refactoring problem Jim Gibson <jimsgibson@gmail.com> - 2013-02-05 13:20 -0800
                Re: refactoring problem Lew <lewbloch@gmail.com> - 2013-02-05 13:31 -0800
                Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 21:42 -0500
            Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-04 18:33 -0500
          Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-04 18:32 -0500
            Re: refactoring problem Martin Gregorie <martin@address-in-sig.invalid> - 2013-02-05 01:50 +0000
          Re: refactoring problem Joshua Cranmer <Pidgeot18@verizon.invalid> - 2013-02-05 10:04 -0600
            Re: refactoring problem Gene Wirchenko <genew@telus.net> - 2013-02-05 10:38 -0800
              Re: refactoring problem Joshua Cranmer <Pidgeot18@verizon.invalid> - 2013-02-05 13:53 -0600
            Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 21:43 -0500
              Re: refactoring problem markspace <markspace@nospam.nospam> - 2013-02-05 19:15 -0800
                Re: refactoring problem Arne Vajhøj <arne@vajhoej.dk> - 2013-02-08 23:58 -0500
  Re: refactoring problem Joerg Meier <joergmmeier@arcor.de> - 2013-02-05 11:09 +0100

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