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Groups > comp.lang.ruby > #2244

Re: functional paradigm taking over

From Mike Stephens <rubfor@recitel.net>
Newsgroups comp.lang.ruby
Subject Re: functional paradigm taking over
Date 2011-04-04 04:05 -0500
Organization Service de news de lacave.net
Message-ID <6aeb13eb26b5656ca2247601ed369bcf@ruby-forum.com> (permalink)
References <BANLkTimKuriDuVMQRFSTs_=7W_iyKMr4kQ@mail.gmail.com>

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This thread has been touching upon three issues - functional languages
as a way of expressing problems, Excel as a language environment, and
the programmer.

Today, relational databases are widely accepted. However Ted Codd did
not invent the relational model because he thought relations were neat.
If you look at what he said at the time, his motivation was to make
corporate data more accessible to non-programmers. Forty years ago he
thought there were less programmers than there were programs to be
written. Arguably the same is true today.

When I was a boy, I would see IDMS recordsets like this:

200
300
150
200
230
etc

What this represented was

2011/Q1 Sales = £200
2011/Q2 Sales = £300
2011/Q2 Sales = £150

Worse still you would have:

12
200
27
300
etc

which meant:
2011/Q1 Sales = £200
2011/Q1 Units = 12
2011/Q2 Sales = £300
2011/Q2 Units = 27
etc

Tedd said you must use relations. Relations are unordered so you can't
hide information in the order of data. Also you must have a field name
for each field (and it should be on the same domain, so Sales shouldn't
be in the same 'column' as Units).

You would therefore have to have:

Period Sales Units
2011/Q1 200   12
2011/Q2 300   27
etc

Whilst- as we all know - that typically doesn't tell you everything you
need to know when you come across a recordset, it makes it much easier
for someone not deeply involved in the system concerned, to work out
what is going on.

Put it another way, using relations makes it less likely you will make a
mistake because you didn't know the subtleties of the behaviour of the
programs generating that data.

Then, relations are amenable to first order predicate calculus. This
resticts the complexity of the operations you need to carry out.

When you consider the merits of functional languages, I believe you
should take into account not only the elegance with which you can
express what you want to do, or how amenable it is to eg parallel
processing. You should also consider whether it strikes a better balance
between such issues and accessibility. Does all your terseness and
'elegance' give you a justifiable advantage over something simpler which
could be more easily handled by a person of less capability?

-- 
Posted via http://www.ruby-forum.com/.

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Thread

[OT] functional paradigm taking over Robert Klemme <shortcutter@googlemail.com> - 2011-03-30 02:29 -0500
  Lambda Shambda Mike Stephens <rubfor@recitel.net> - 2011-03-30 04:38 -0500
    Re: Lambda Shambda Robert Klemme <shortcutter@googlemail.com> - 2011-03-30 10:19 -0500
      Re: Lambda Shambda Mike Stephens <rubfor@recitel.net> - 2011-03-30 12:27 -0500
      Re: Lambda Shambda 7stud -- <bbxx789_05ss@yahoo.com> - 2011-03-30 20:49 -0500
      Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-03-30 22:30 -0500
        Re: Lambda Shambda Mike Stephens <rubfor@recitel.net> - 2011-03-31 05:08 -0500
          Re: Lambda Shambda Josh Cheek <josh.cheek@gmail.com> - 2011-04-02 15:07 -0500
            Re: Lambda Shambda Mike Stephens <rubfor@recitel.net> - 2011-04-03 00:29 -0500
              Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-03 02:48 -0500
                Re: Lambda Shambda Robert Klemme <shortcutter@googlemail.com> - 2011-04-03 12:58 +0200
                Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-03 06:50 -0500
                Re: Lambda Shambda Josh Cheek <josh.cheek@gmail.com> - 2011-04-03 13:59 -0500
                Re: Lambda Shambda Johnny Morrice <spoon@killersmurf.com> - 2011-04-03 15:06 -0500
                Re: Lambda Shambda Josh Cheek <josh.cheek@gmail.com> - 2011-04-03 15:56 -0500
                Re: Lambda Shambda Everett L Williams II <rett@classicnet.net> - 2011-04-03 07:17 -0500
                Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-03 07:47 -0500
                Why should I be a programmer, to program? Mike Stephens <rubfor@recitel.net> - 2011-04-03 13:44 -0500
                Re: Why should I be a programmer, to program? Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-03 14:45 -0500
                Re: Why should I be a programmer, to program? Johnny Morrice <spoon@killersmurf.com> - 2011-04-03 15:58 -0500
                Re: Why should I be a programmer, to program? Josh Cheek <josh.cheek@gmail.com> - 2011-04-03 15:21 -0500
                Re: Why should I be a programmer, to program? serialhex <serialhex@gmail.com> - 2011-04-03 15:34 -0500
                Re: Why should I be a programmer, to program? - OT Chris <chris@s-4-u.net> - 2011-04-03 15:53 -0500
                Re: Why should I be a programmer, to program? Petite Abeille <petite.abeille@gmail.com> - 2011-04-03 16:01 -0500
                Re: Why should I be a programmer, to program? - OT Chris <chris@s-4-u.net> - 2011-04-03 16:42 -0500
                Re: Lambda Shambda Everett L Williams II <rett@classicnet.net> - 2011-04-04 04:23 -0500
                Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-04 04:52 -0500
                Re: Lambda Shambda Robert Klemme <shortcutter@googlemail.com> - 2011-04-04 06:19 -0500
                Re: Lambda Shambda Martin DeMello <martindemello@gmail.com> - 2011-04-03 08:13 -0500
                Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-04 00:55 -0500
                Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-04 10:16 -0500
                Re: Lambda Shambda Iain Barnett <iainspeed@gmail.com> - 2011-04-04 15:50 -0500
              Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-03 15:07 -0500
          Re: Lambda Shambda Johnny Morrice <spoon@killersmurf.com> - 2011-04-03 06:05 -0500
        Re: Lambda Shambda Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-03-31 13:56 -0500
  Re: [OT] functional paradigm taking over Martin DeMello <martindemello@gmail.com> - 2011-03-30 15:46 -0500
  Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-04 04:05 -0500
    Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 04:21 -0500
    Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 04:25 -0500
    Re: functional paradigm taking over Stu <stu@rubyprogrammer.net> - 2011-04-04 04:28 -0500
      Re: functional paradigm taking over Robert Dober <robert.dober@gmail.com> - 2011-04-04 06:49 -0500
    Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-04 05:00 -0500
      Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 05:15 -0500
        Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-04 05:18 -0500
    Re: functional paradigm taking over Everett L Williams II <rett@classicnet.net> - 2011-04-04 06:31 -0500
      Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 07:17 -0500
        Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 07:29 -0500
          Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-04 10:42 -0500
            Re: functional paradigm taking over Michal Suchanek <hramrach@centrum.cz> - 2011-04-04 12:43 -0500
            Re: functional paradigm taking over Robert Dober <robert.dober@gmail.com> - 2011-04-10 11:59 -0500
              Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-12 01:18 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-12 01:22 -0500
                Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-12 02:09 -0500
                Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-12 02:11 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-12 02:47 -0500
                Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-12 03:40 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 00:53 -0500
                Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-13 01:02 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 01:38 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 01:46 -0500
                Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-13 02:46 -0500
                Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-13 03:52 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 09:59 -0500
                Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-13 10:16 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 11:18 -0500
                Re: functional paradigm taking over serialhex <serialhex@gmail.com> - 2011-04-13 14:41 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 15:34 -0500
                Re: functional paradigm taking over Peter Hickman <peterhickman386@googlemail.com> - 2011-04-13 10:17 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 18:44 -0500
                Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-14 00:32 -0500
                Re: functional paradigm taking over Michal Suchanek <hramrach@centrum.cz> - 2011-04-14 05:06 -0500
                Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-15 01:25 -0500
      Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-04 07:41 -0500
        Re: functional paradigm taking over Michal Suchanek <hramrach@centrum.cz> - 2011-04-04 07:56 -0500
        Re: functional paradigm taking over Stu <stu@rubyprogrammer.net> - 2011-04-05 03:58 -0500
          Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-05 04:12 -0500
            Re: functional paradigm taking over Stu <stu@rubyprogrammer.net> - 2011-04-05 16:57 -0500
      Re: functional paradigm taking over Everett L Williams II <rett@classicnet.net> - 2011-04-07 10:51 -0500
        Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-07 18:42 -0500
          Re: functional paradigm taking over Alex Stahl <astahl@hi5.com> - 2011-04-07 20:26 -0500
        Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-07 22:14 -0500
          Re: functional paradigm taking over Johnny Morrice <spoon@killersmurf.com> - 2011-04-08 06:10 -0500
          Re: functional paradigm taking over Everett L Williams II <rett@classicnet.net> - 2011-04-08 13:58 -0500
  Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-08 16:04 -0500
    Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-08 19:12 -0500
  Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-12 07:31 -0500
    Re: functional paradigm taking over Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-12 11:22 -0500
  Re: functional paradigm taking over Gregory Vella <gregory_vella@yahoo.com> - 2011-04-13 14:49 -0500
    Re: functional paradigm taking over Kevin <darkintent@gmail.com> - 2011-04-13 15:59 -0500
  Re: functional paradigm taking over Mike Stephens <rubfor@recitel.net> - 2011-04-14 02:28 -0500
    Re: functional paradigm taking over Robert Klemme <shortcutter@googlemail.com> - 2011-04-14 03:29 -0500
      Re: functional paradigm taking over Josh Cheek <josh.cheek@gmail.com> - 2011-04-14 05:01 -0500

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