[29263] in Perl-Users-Digest
Perl-Users Digest, Issue: 507 Volume: 11
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Tue Jun 12 00:14:32 2007
Date: Mon, 11 Jun 2007 21:14:11 -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 Mon, 11 Jun 2007 Volume: 11 Number: 507
Today's topics:
Re: =?utf-8?B?4paIKF9ZXyniloggSmVzc2ljYSBTaW1wc29uIE5ha complex.easy.n7@gmail.com
Re: =?utf-8?B?4paIKF9ZXyniloggSmVzc2ljYSBTaW1wc29uIE5ha complex.easy.n7@gmail.com
Re: Passing literal with reference? <dorno@nowhere.com>
Re: Passing literal with reference? <mritty@gmail.com>
Re: The Concepts and Confusions of Prefix, Infix, Postf <twisted0n3@gmail.com>
Re: The Concepts and Confusions of Prefix, Infix, Postf <twisted0n3@gmail.com>
Re: The Concepts and Confusions of Prefix, Infix, Postf <dan@coruskate.net>
Re: TITS Boobs Knockers Jugs Headlights big and small complex.easy.n9@gmail.com
Re: TITS Boobs Knockers Jugs Headlights big and small complex.easy.n9@gmail.com
Re: Useless use of array element in void context <mritty@gmail.com>
Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)
----------------------------------------------------------------------
Date: Tue, 12 Jun 2007 00:27:35 GMT
From: complex.easy.n7@gmail.com
Subject: Re: =?utf-8?B?4paIKF9ZXyniloggSmVzc2ljYSBTaW1wc29uIE5ha2VkIENhciBXYXNoIFZpZGVvcw==?=
Message-Id: <2338661205.427806.30419@g4g2000hsf.googlegroups.com>
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------------------------------
Date: Mon, 11 Jun 2007 23:48:13 GMT
From: complex.easy.n7@gmail.com
Subject: Re: =?utf-8?B?4paIKF9ZXyniloggSmVzc2ljYSBTaW1wc29uIE5ha2VkIENhciBXYXNoIFZpZGVvcw==?=
Message-Id: <9131775069.639506.83747@g4g2000hsf.googlegroups.com>
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------------------------------
Date: Mon, 11 Jun 2007 20:26:15 +0000
From: dorno <dorno@nowhere.com>
Subject: Re: Passing literal with reference?
Message-Id: <pan.2007.06.11.20.25.14.736102@nowhere.com>
> Why do you say that? The code below prints "myvariable" just as I would
> have expected:
>
> sub myroutine {
> my $ref = shift;
> print $$ref;
> }
> }
> myroutine( \'myvariable' );
That did it.
My problem was that I was always using double quotes,
myroutine(\"myvariable");
I didn't think to try single quotes, but...
The Programming Perl, Perl Cookbook, and others all use double quotes in
their examples. Not as an example of referencing a literal, but as a way
to pass a literal.
Now that I know the answer, I still have not found an example in all my
Perl books. Apparently passing a literal reference in a mixed string of
parameters is not done by Perl gurus. Or else they consider it so simple
that no verbage need be wasted on the topic.
Anyhow, it works. Thanks all.
dorno
------------------------------
Date: Mon, 11 Jun 2007 19:02:23 -0700
From: Paul Lalli <mritty@gmail.com>
Subject: Re: Passing literal with reference?
Message-Id: <1181613743.082036.271190@a26g2000pre.googlegroups.com>
On Jun 11, 4:26 pm, dorno <d...@nowhere.com> wrote:
> > Why do you say that? The code below prints "myvariable" just as I would
> > have expected:
>
> > sub myroutine {
> > my $ref = shift;
> > print $$ref;
> > }
> > }
> > myroutine( \'myvariable' );
>
> That did it.
>
> My problem was that I was always using double quotes,
> myroutine(\"myvariable");
There is no difference in this case between single and double quotes.
They do the exact same thing. To illustrate:
#!/usr/bin/env perl
use strict;
use warnings;
myroutine(\'foobar');
myroutine(\"foobar");
sub myroutine {
my $ref = shift;
print $$ref . "\n";
}
__END__
foobar
foobar
> I didn't think to try single quotes, but...
> The Programming Perl, Perl Cookbook, and others all use double
> quotes in their examples. Not as an example of referencing a
> literal, but as a way to pass a literal.
Do you understand the difference between double and single quotes?
Double quotes interpolate variables and character escapes. Single
quotes do not. That's it.
> Now that I know the answer, I still have not found an example
> in all my Perl books. Apparently passing a literal reference
> in a mixed string of parameters is not done by Perl gurus.
It's not done for the reason you keep trying to do, because as I'm now
stating for the third time in this thread, the problem you keep trying
to solve does not exist. Passing a literal directly into a subroutine
does not cause it to magically get attached to any subsequent value
passed in. You still have not showed any example of code where you
think this is happening.
Paul Lalli
------------------------------
Date: Tue, 12 Jun 2007 02:52:05 -0000
From: Twisted <twisted0n3@gmail.com>
Subject: Re: The Concepts and Confusions of Prefix, Infix, Postfix and Fully Functional Notations
Message-Id: <1181616725.678833.104690@n15g2000prd.googlegroups.com>
On Jun 11, 5:36 pm, Tim Bradshaw <tfb+goo...@tfeb.org> wrote:
> I think it's just obvious that this is the case. What would *stop*
> you writing maintainable Perl?
For starters, the fact that there are about six zillion obscure
operators represented by punctuation marks, instead of a dozen or so.
More generally, the fact that it comes out looking like modem barf,
and modem barf is unmaintainable. ;)
------------------------------
Date: Tue, 12 Jun 2007 02:53:54 -0000
From: Twisted <twisted0n3@gmail.com>
Subject: Re: The Concepts and Confusions of Prefix, Infix, Postfix and Fully Functional Notations
Message-Id: <1181616834.331070.179540@i38g2000prf.googlegroups.com>
On Jun 11, 8:57 pm, Patricia Shanahan <p...@acm.org> wrote:
> I wrote a Perl script to process logic analyzer traces for some hardware
> engineers. While I was out of the office, they found they needed to
> process a new record type. They didn't want to delay their work until I
> got back, and one of the EEs knew Perl, so he modified my script.
>
> The change was done correctly. It not only worked. Except for a couple
> of comments calling my attention to the changes, it looked as though
> the new record type had always been there.
*blinks*
Hallelujah! It's a miracle! Praise be the Lord! This must surely be a
sign...
a sign of the End Times. :P
------------------------------
Date: Tue, 12 Jun 2007 03:11:14 +0100
From: Daniel Barlow <dan@coruskate.net>
Subject: Re: The Concepts and Confusions of Prefix, Infix, Postfix and Fully Functional Notations
Message-Id: <1181614274.14141.0@proxy02.news.clara.net>
Tim Bradshaw wrote:
> I think it's just obvious that this is the case. What would *stop*
> you writing maintainable Perl?
A grudge against humanity, usually
-dan
------------------------------
Date: Mon, 11 Jun 2007 22:34:54 GMT
From: complex.easy.n9@gmail.com
Subject: Re: TITS Boobs Knockers Jugs Headlights big and small
Message-Id: <8977267007.646963.388203@m36g2000hse.googlegroups.com>
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------------------------------
Date: Tue, 12 Jun 2007 01:37:49 GMT
From: complex.easy.n9@gmail.com
Subject: Re: TITS Boobs Knockers Jugs Headlights big and small
Message-Id: <8387123951.674227.508708@m36g2000hse.googlegroups.com>
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------------------------------
Date: Mon, 11 Jun 2007 18:55:59 -0700
From: Paul Lalli <mritty@gmail.com>
Subject: Re: Useless use of array element in void context
Message-Id: <1181613359.453947.120430@q19g2000prn.googlegroups.com>
On Jun 11, 7:01 pm, "Dr.Ruud" <rvtol+n...@isolution.nl> wrote:
> Marek schreef:
> > This is looking really genius! But this gives me a syntax
> > error! I probably misunderstood something?
>
> What did you try,
Er. Presumably the line of quote directly above the text that you
just quoted...
my $result[$_] = $out_line[$_] - $old_line[$_] for 2..6;
> and what was the syntax error?
Looking at it, I'd say the syntax error would be to the effect that
you can't declare an array element with 'my'.
Paul Lalli
------------------------------
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)
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End of Perl-Users Digest V11 Issue 507
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