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Re: Comparing arraies

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Michael Haufe (TNO) wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Michael Haufe (TNO) wrote:
>> > On Jan 31, 10:08 am, John G Harris <j...@nospam.demon.co.uk> wrote:
>> >> If you want to describe side effects then you have to say that the
>> >> function is from system state to system state. The input state
>> >> includes places to hold the arguments, and places holding anything
>> >> else that affects the result. The output state includes a place to
>> >> hold the result, if any, and places holding the consequences of side
>> >> effects, including the effects of an exception.
>>
>> > That is one possible method, but neither the 'function' of JavaScript
>> > or any other language you've mentioned do this. To repeat what has
>> > been said earlier: it does not matter what word is used in the
>> > language, 'function' is not a true function in the mathematical sense,
>> > nor can all of the operators of the language.
>>
>> I have to disagree here.  That the outcome of a programmatic function,
>> given the same arguments in the same order, is not necessarily the same
>> always, and there may be side-effects, is what distinguishes it from a
>> programmatic operator.
>>
>> With such a programmatic operator, by definition the outcome must be the
>> same given the same operand(s) in the same order (or the operator becomes
>> ambiguous and useless).  It is therefore an non-injective *mathematical*
>> function of the operands, from the sets that the operands may belong to,
>> to the set of the result type.  But it is _not_ a function in the
>> *syntax* of any programming language, not even C++, because you *need to*
>> tell the two kinds apart to make sense of the syntax, i. e. to parse the
>> program.
> 
> First off, I need to correct an error:
> 
> "...nor can all of the operators of the language."
> 
> s/can/are
> 
> Second, I'm not certain what you're disagreeing with exactly. Perhaps
> I was ambiguous on something.

I am disagreeing with you when you say that (all) operators in a programming 
language ("programmatic operator(s)") are not true functions in the 
mathematical sense (are not "mathematical function(s)").  I think they are, 
because of the reasons I named above.


PointedEars
-- 
When all you know is jQuery, every problem looks $(olvable).

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Comparing arraies Archos <raul.san@sent.com> - 2012-01-26 07:23 -0800
  Re: Comparing arraies Martin Honnen <mahotrash@yahoo.de> - 2012-01-26 18:29 +0100
    Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-26 19:50 +0100
      Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-26 19:54 +0100
        Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-27 16:49 +0000
          Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-27 18:41 +0100
            Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-28 11:28 +0000
              Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-28 21:17 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-29 14:55 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-29 17:13 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-30 15:27 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-30 19:03 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 15:07 +0000
                Re: Comparing arraies Dr J R Stockton <reply1205@merlyn.demon.co.uk> - 2012-01-31 18:51 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-30 12:01 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 11:06 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-31 06:08 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 16:08 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-31 18:32 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-01 17:02 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 10:07 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-02 15:10 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-02 11:16 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-07 15:14 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-01 21:45 +0100
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 13:07 -0800
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-01 23:44 +0100
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 18:22 -0800
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-02 23:09 +0100
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-03 01:47 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-04 10:34 +0000
                Re: Comparing arraies Dr J R Stockton <reply1205@merlyn.demon.co.uk> - 2012-02-05 16:47 +0000
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-06 15:21 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-04 23:37 -0800
    Re: Comparing arraies Denis McMahon <denismfmcmahon@gmail.com> - 2012-01-26 23:08 +0000
      Re: Comparing arraies Denis McMahon <denismfmcmahon@gmail.com> - 2012-01-27 01:42 +0000
        Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-27 11:41 +0100
      Re: Comparing arraies Gene Wirchenko <genew@ocis.net> - 2012-01-26 16:24 -0800
        Re: Comparing arraies "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-01-27 08:50 +0000
      Re: Comparing arraies Dr J R Stockton <reply1204@merlyn.demon.co.uk> - 2012-01-27 21:07 +0000
        Re: Comparing arraies "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-01-28 13:45 +0000
  Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-26 16:21 -0800
    Re: Comparing arraies Martin Honnen <mahotrash@yahoo.de> - 2012-01-27 16:00 +0100

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