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Groups > comp.lang.python > #21035

Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade!

Date 2012-02-29 13:08 +0100
From Kiuhnm <kiuhnm03.4t.yahoo.it>
Newsgroups comp.lang.lisp, comp.emacs, comp.lang.python, comp.lang.perl.misc
Followup-To comp.lang.lisp
Subject Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade!
References <0078bbfb-5dfc-48fc-af1a-69de3cf15c3e@b1g2000yqb.googlegroups.com>
Message-ID <4f4e1554$0$1385$4fafbaef@reader2.news.tin.it> (permalink)
Organization TIN.IT (http://www.tin.it)

Cross-posted to 4 groups.

Followups directed to: comp.lang.lisp

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On 2/29/2012 9:09, Xah Lee wrote:
> New Science Discovery: Perl Idiots Remain Idiots After A Decade!
>
> A excerpt from the new book 〈Modern Perl〉, just published, chapter 4
> on “Operators”. Quote:
>
> «The associativity of an operator governs whether it evaluates from
> left to right or right to left. Addition is left associative, such
> that 2 + 3 + 4 evaluates 2 + 3 first, then adds 4 to the result.
> Exponentiation is right associative, such that 2 ** 3 ** 4 evaluates 3
> ** 4 first, then raises 2 to the 81st power. »
>
> LOL. Looks like the perl folks haven't changed. Fundamentals of
> serious math got botched so badly.
>
> Let me explain the idiocy.
>
> It says “The associativity of an operator governs whether it evaluates
> from left to right or right to left.”. Ok, so let's say we have 2
> operators: a white triangle △ and a black triangle ▲. Now, by the
> perl's teaching above, let's suppose the white triangle is “right
> associative” and the black triangle is “left associative”. Now, look
> at this:
>
> 3 △ 6 ▲ 5
>
> seems like the white and black triangles are going to draw a pistol
> and fight for the chick 6 there. LOL.

Sorry, but you're wrong and they're right.
Associativity governs the order of evaluation of a group of operators 
*OF THE SAME PRECEDENCE*.
If you write
   2**3**4
only the fact the '**' is right associative will tell you that the order is
   2**(3**4)
and not
   (2**3)**4
I remind you that 2^(3^4) != (2^3)^4.

Kiuhnm

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New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Xah Lee <xahlee@gmail.com> - 2012-02-29 00:09 -0800
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Chiron <chiron613@gmail.com> - 2012-02-29 11:43 +0000
    Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-02-29 07:12 -0500
    Re: New Science Discovery: Perl Detracters Remain Idiots After A Decade! Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-02-29 23:06 -0500
      Re: New Science Discovery: Perl Detracters Remain Idiots After A Decade! Chiron <chiron613@gmail.com> - 2012-03-01 04:52 +0000
        Re: New Science Discovery: Perl Detracters Remain Idiots After A Decade! Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-01 10:07 -0500
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-02-29 13:08 +0100
    Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Xah Lee <xahlee@gmail.com> - 2012-02-29 16:02 -0800
      Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-01 12:00 +0100
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Xah Lee <xahlee@gmail.com> - 2012-03-02 05:12 -0800
          Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-02 15:15 +0100
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-02-29 15:15 +0000
    Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-02-29 17:18 +0100
    Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-02-29 23:10 -0500
      Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Chiron <chiron613@gmail.com> - 2012-03-01 05:07 +0000
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-01 10:13 -0500
          Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Chiron <chiron613@gmail.com> - 2012-03-02 14:17 +0000
            Re: New Science Discovery: Perl Detractors Remain Idiots After A Decade! Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-02 10:53 -0500
              Re: New Science Discovery: Perl Detractors Remain Idiots After A Decade! Chiron <chiron613@gmail.com> - 2012-03-02 19:06 +0000
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-03-01 16:58 -0500
      Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-03-01 14:40 +0000
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-01 16:11 -0500
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! namekuseijin <namekuseijin@gmail.com> - 2012-02-29 09:45 -0800
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Westley Martínez <anikom15@gmail.com> - 2012-03-01 16:46 -0800
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Chiron <chiron613@gmail.com> - 2012-03-02 07:27 +0000
  Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-03-12 11:27 +0000
    Re: New Science Discovery: Perl Detractors Remain Idiots After A Decade Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-12 08:40 -0400
      Re: New Science Discovery: Perl Detractors Remain Idiots After A Decade Raymond Wiker <raw@unknown-00-23-6c-8d-9e-26.lan> - 2012-03-12 19:20 +0100
    Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-12 14:05 +0100
      Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-03-12 19:00 +0000
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-12 21:27 +0100
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-13 12:00 +0100
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-13 12:03 +0100
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots Af Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> - 2012-03-12 16:20 -0400
        Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade! Kiuhnm <kiuhnm03.4t.yahoo.it> - 2012-03-13 17:41 +0100

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