[32372] in Perl-Users-Digest
Perl-Users Digest, Issue: 3639 Volume: 11
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Tue Mar 13 03:09:22 2012
Date: Tue, 13 Mar 2012 00:09:03 -0700 (PDT)
From: Perl-Users Digest <Perl-Users-Request@ruby.OCE.ORST.EDU>
To: Perl-Users@ruby.OCE.ORST.EDU (Perl-Users Digest)
Perl-Users Digest Tue, 13 Mar 2012 Volume: 11 Number: 3639
Today's topics:
Re: New Science Discovery: Perl Detractors Remain Idiot <raw@unknown-00-23-6c-8d-9e-26.lan>
Re: New Science Discovery: Perl Idiots Remain Idiots Af <albert@spenarnc.xs4all.nl>
Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)
----------------------------------------------------------------------
Date: Mon, 12 Mar 2012 19:20:26 +0100
From: Raymond Wiker <raw@unknown-00-23-6c-8d-9e-26.lan>
Subject: Re: New Science Discovery: Perl Detractors Remain Idiots After A Decade
Message-Id: <m2mx7lel5h.fsf@unknown-00-23-6c-8d-9e-26.lan>
Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> writes:
> In <m0rrtp.2pl@spenarnc.xs4all.nl>, on 03/12/2012
> at 11:27 AM, Albert van der Horst <albert@spenarnc.xs4all.nl> said:
>
>>You're confused.
>
> No, s/h/it is just an acephalic troll with delusions of adequacy.
Another way to put it is to say that Xah is a legend in his
own mind.
------------------------------
Date: 12 Mar 2012 19:00:30 GMT
From: Albert van der Horst <albert@spenarnc.xs4all.nl>
Subject: Re: New Science Discovery: Perl Idiots Remain Idiots After A Decade!New Science Discovery: Perl Idiots Remain Idiots After A Decade!
Message-Id: <m0scsu.8xu@spenarnc.xs4all.nl>
In article <4f5df4b3$0$1375$4fafbaef@reader1.news.tin.it>,
Kiuhnm <kiuhnm03.4t.yahoo.it> wrote:
>On 3/12/2012 12:27, Albert van der Horst wrote:
>> Interestingly in mathematics associative means that it doesn't matter
>> whether you use (a.b).c or a.(b.c).
>> Using xxx-associativity to indicate that it *does* matter is
>> a bit perverse, but the Perl people are not to blame if they use
>> a term in their usual sense.
>
>You may see it this way:
>Def1. An operator +:SxS->S is left-associative iff
> a+b+c = (a+b)+c for all a,b,c in S.
>Def2. An operator +:SxS->S is right-associative iff
> a+b+c = a+(b+c) for all a,b,c in S.
>Def3. An operator +:SxS->S is associative iff it is both left and
>right-associative.
I know, but what the mathematicians do make so much more sense:
(a+b)+c = a+(b+c) definition of associative.
Henceforth we may leave out the brackets.
Don't leave out the brackets if the operators if the operators is
not associative.
P.S. There is no need for the operators to be SxS->S.
For example a b c may be m by n, n by l, l by k matrices respectively.
>
>Kiuhnm
Groetjes Albert
--
--
Albert van der Horst, UTRECHT,THE NETHERLANDS
Economic growth -- being exponential -- ultimately falters.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst
------------------------------
Date: 6 Apr 2001 21:33:47 GMT (Last modified)
From: Perl-Users-Request@ruby.oce.orst.edu (Perl-Users-Digest Admin)
Subject: Digest Administrivia (Last modified: 6 Apr 01)
Message-Id: <null>
Administrivia:
To submit articles to comp.lang.perl.announce, send your article to
clpa@perl.com.
Back issues are available via anonymous ftp from
ftp://cil-www.oce.orst.edu/pub/perl/old-digests.
#For other requests pertaining to the digest, send mail to
#perl-users-request@ruby.oce.orst.edu. Do not waste your time or mine
#sending perl questions to the -request address, I don't have time to
#answer them even if I did know the answer.
------------------------------
End of Perl-Users Digest V11 Issue 3639
***************************************
