[28227] in Perl-Users-Digest
Perl-Users Digest, Issue: 9591 Volume: 10
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Fri Aug 11 06:05:48 2006
Date: Fri, 11 Aug 2006 03:05:05 -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 Fri, 11 Aug 2006 Volume: 10 Number: 9591
Today's topics:
Re: flock not locking xargle@eh.org
Re: module install question <a@mail.com>
Re: module install question <benmorrow@tiscali.co.uk>
Parsing text to array <sicsicsic@freesurf.ch>
Re: Parsing text to array anno4000@radom.zrz.tu-berlin.de
Re: Parsing text to array usenet@DavidFilmer.com
Re: Parsing text to array <sicsicsic@freesurf.ch>
perl appserver shootout: jifty maypole catalyst BOP gan <bootiack@yahoo.com>
Posting Guidelines for comp.lang.perl.misc ($Revision: tadmc@augustmail.com
Reading integer values from a file praveen.kantharajapura@gmail.com
Re: Reading integer values from a file anno4000@radom.zrz.tu-berlin.de
Re: Reading integer values from a file usenet@DavidFilmer.com
Re: Reading integer values from a file <bik.mido@tiscalinet.it>
Re: Reading integer values from a file <bik.mido@tiscalinet.it>
Re: Sort keys in a hash numerically anno4000@radom.zrz.tu-berlin.de
Re: Storing multiple selections <bik.mido@tiscalinet.it>
Digest Administrivia (Last modified: 6 Apr 01) (Perl-Users-Digest Admin)
----------------------------------------------------------------------
Date: 11 Aug 2006 01:07:06 -0700
From: xargle@eh.org
Subject: Re: flock not locking
Message-Id: <1155283626.726294.163370@74g2000cwt.googlegroups.com>
Thanks Xho and Ben, Xho was spot on in identifying the issue, and I've
corrected all the problems Ben pointed out. I've been writing C for
over a decade so certain styles have become habit which don't
necessarily apply under perl :)
Nice to see perlites are so helpful!
--
Tony
------------------------------
Date: Fri, 11 Aug 2006 07:35:42 GMT
From: "a" <a@mail.com>
Subject: Re: module install question
Message-Id: <irWCg.364640$iF6.74263@pd7tw2no>
"Tintin" <tintin@invalid.invalid> 撰寫於郵件新聞
:44dc1cd0$0$444$88260bb3@free.teranews.com...
>
> "a" <a@mail.com> wrote in message news:Z6VCg.374022$IK3.367968@pd7tw1no...
> > Hi
> > According to the instruction of the README for the downloaded module,
the
> > installation procedure always,
> > perl Makefile.pl
> > make
> > make test
> > make install
> > I can only do perl Makefile.pl. The make commands are all failed and
there
> > is no test and install file. Do the last 3 commands necessary?
> > Thanks
>
> What OS are you on?
> What are the *exact* error messages you are getting?
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>
I use cygwin.
/bin/make
/bin/sh: 0: command not found
make: *** [blib/lib/.exists] error 127
For make test and make install,
there is no test and install file
------------------------------
Date: Fri, 11 Aug 2006 08:42:13 +0100
From: Ben Morrow <benmorrow@tiscali.co.uk>
Subject: Re: module install question
Message-Id: <lvotq3-45e.ln1@osiris.mauzo.dyndns.org>
Quoth "a" <a@mail.com>:
> "Tintin" <tintin@invalid.invalid> 撰寫於郵件新聞
> :44dc1cd0$0$444$88260bb3@free.teranews.com...
> >
> > "a" <a@mail.com> wrote in message news:Z6VCg.374022$IK3.367968@pd7tw1no...
> > > Hi
> > > According to the instruction of the README for the downloaded module,
> the
> > > installation procedure always,
> > > perl Makefile.pl
> > > make
> > > make test
> > > make install
> > > I can only do perl Makefile.pl. The make commands are all failed and
> there
> > > is no test and install file. Do the last 3 commands necessary?
> > > Thanks
> >
> > What OS are you on?
> > What are the *exact* error messages you are getting?
>
> I use cygwin.
> /bin/make
> /bin/sh: 0: command not found
> make: *** [blib/lib/.exists] error 127
You have cygwin installed wrong. It's probably easiest to just reinstall
from the Setup.exe.
> For make test and make install,
> there is no test and install file
No, that's expected. 'make test' doesn't use a 'test' file.
Ben
--
For far more marvellous is the truth than any artists of the past imagined!
Why do the poets of the present not speak of it? What men are poets who can
speak of Jupiter if he were like a man, but if he is an immense spinning
sphere of methane and ammonia must be silent?~Feynmann~benmorrow@tiscali.co.uk
------------------------------
Date: Fri, 11 Aug 2006 10:05:18 +0200
From: Philipp <sicsicsic@freesurf.ch>
Subject: Parsing text to array
Message-Id: <1155283516_2131@sicinfo3.epfl.ch>
Hello
I would like to parse a piece of text to an array. Is there one of those
Perl-magical ways to do this? Or should I use split and iterate through
the lines?
Thank you for your answers
Phil
$content = "hello world\nthis should be parsed";
# do something here to parse words to columns
# and lines to lines of array
print $contentarray[0][0]; #should print "hello"
print $contentarray[1][2]; #should print "be"
------------------------------
Date: 11 Aug 2006 08:30:28 GMT
From: anno4000@radom.zrz.tu-berlin.de
Subject: Re: Parsing text to array
Message-Id: <4k2th4Faed3aU1@news.dfncis.de>
Philipp <sicsicsic@freesurf.ch> wrote in comp.lang.perl.misc:
> Hello
> I would like to parse a piece of text to an array. Is there one of those
> Perl-magical ways to do this? Or should I use split and iterate through
> the lines?
>
> Thank you for your answers
> Phil
>
>
> $content = "hello world\nthis should be parsed";
>
> # do something here to parse words to columns
> # and lines to lines of array
>
> print $contentarray[0][0]; #should print "hello"
> print $contentarray[1][2]; #should print "be"
my @contentarray = map [ split], split /\n/, $content;
What have you tried?
Anno
------------------------------
Date: 11 Aug 2006 02:00:11 -0700
From: usenet@DavidFilmer.com
Subject: Re: Parsing text to array
Message-Id: <1155286811.886302.300000@i42g2000cwa.googlegroups.com>
Philipp wrote:
> I would like to parse a piece of text to an array. Is there one of those
> Perl-magical ways to do this?
I don't know about 'magical,' but of course it can be easily done in
Perl. It is, after all, a parsing language.
> Or should I use split and iterate through
That would be the worst approach.
Anything else you wish to ask about?
--
David Filmer (http://DavidFilmer.com)
------------------------------
Date: Fri, 11 Aug 2006 11:24:23 +0200
From: Philipp <sicsicsic@freesurf.ch>
Subject: Re: Parsing text to array
Message-Id: <1155288261_2149@sicinfo3.epfl.ch>
anno4000@radom.zrz.tu-berlin.de wrote:
> Philipp <sicsicsic@freesurf.ch> wrote in comp.lang.perl.misc:
>> Hello
>> I would like to parse a piece of text to an array. Is there one of those
>> Perl-magical ways to do this? Or should I use split and iterate through
>> the lines?
>>
>> Thank you for your answers
>> Phil
>>
>>
>> $content = "hello world\nthis should be parsed";
>>
>> # do something here to parse words to columns
>> # and lines to lines of array
>>
>> print $contentarray[0][0]; #should print "hello"
>> print $contentarray[1][2]; #should print "be"
>
> my @contentarray = map [ split], split /\n/, $content;
>
> What have you tried?
Hello and thanks for your answer.
I didn't know "map". Does exactly what I want...
I would have done a "for" loop on the lines, but I thought that some
smarter perl way existed (and was obviously right).
Thanks again
Phil
------------------------------
Date: 11 Aug 2006 01:27:33 -0700
From: "gavino" <bootiack@yahoo.com>
Subject: perl appserver shootout: jifty maypole catalyst BOP gantry poe? who wins?
Message-Id: <1155284853.239760.306730@i3g2000cwc.googlegroups.com>
And more importantly, why?
1 fast site
2 maintainable site
3 site the helps people get data reports and update data concurrently
accross the organization
4 site that is ez to debug
5 site that scales to 100s of users?
Please share implementation details or experiences thx
------------------------------
Date: 11 Aug 2006 07:22:25 GMT
From: tadmc@augustmail.com
Subject: Posting Guidelines for comp.lang.perl.misc ($Revision: 1.6 $)
Message-Id: <44dc302e$0$47250$ae4e5890@news.nationwide.net>
Outline
Before posting to comp.lang.perl.misc
Must
- Check the Perl Frequently Asked Questions (FAQ)
- Check the other standard Perl docs (*.pod)
Really Really Should
- Lurk for a while before posting
- Search a Usenet archive
If You Like
- Check Other Resources
Posting to comp.lang.perl.misc
Is there a better place to ask your question?
- Question should be about Perl, not about the application area
How to participate (post) in the clpmisc community
- Carefully choose the contents of your Subject header
- Use an effective followup style
- Speak Perl rather than English, when possible
- Ask perl to help you
- Do not re-type Perl code
- Provide enough information
- Do not provide too much information
- Do not post binaries, HTML, or MIME
Social faux pas to avoid
- Asking a Frequently Asked Question
- Asking a question easily answered by a cursory doc search
- Asking for emailed answers
- Beware of saying "doesn't work"
- Sending a "stealth" Cc copy
Be extra cautious when you get upset
- Count to ten before composing a followup when you are upset
- Count to ten after composing and before posting when you are upset
-----------------------------------------------------------------
Posting Guidelines for comp.lang.perl.misc ($Revision: 1.6 $)
This newsgroup, commonly called clpmisc, is a technical newsgroup
intended to be used for discussion of Perl related issues (except job
postings), whether it be comments or questions.
As you would expect, clpmisc discussions are usually very technical in
nature and there are conventions for conduct in technical newsgroups
going somewhat beyond those in non-technical newsgroups.
The article at:
http://www.catb.org/~esr/faqs/smart-questions.html
describes how to get answers from technical people in general.
This article describes things that you should, and should not, do to
increase your chances of getting an answer to your Perl question. It is
available in POD, HTML and plain text formats at:
http://www.augustmail.com/~tadmc/clpmisc.shtml
For more information about netiquette in general, see the "Netiquette
Guidelines" at:
http://andrew2.andrew.cmu.edu/rfc/rfc1855.html
A note to newsgroup "regulars":
Do not use these guidelines as a "license to flame" or other
meanness. It is possible that a poster is unaware of things
discussed here. Give them the benefit of the doubt, and just
help them learn how to post, rather than assume
A note about technical terms used here:
In this document, we use words like "must" and "should" as
they're used in technical conversation (such as you will
encounter in this newsgroup). When we say that you *must* do
something, we mean that if you don't do that something, then
it's unlikely that you will benefit much from this group.
We're not bossing you around; we're making the point without
lots of words.
Do *NOT* send email to the maintainer of these guidelines. It will be
discarded unread. The guidelines belong to the newsgroup so all
discussion should appear in the newsgroup. I am just the secretary that
writes down the consensus of the group.
Before posting to comp.lang.perl.misc
Must
This section describes things that you *must* do before posting to
clpmisc, in order to maximize your chances of getting meaningful replies
to your inquiry and to avoid getting flamed for being lazy and trying to
have others do your work.
The perl distribution includes documentation that is copied to your hard
drive when you install perl. Also installed is a program for looking
things up in that (and other) documentation named 'perldoc'.
You should either find out where the docs got installed on your system,
or use perldoc to find them for you. Type "perldoc perldoc" to learn how
to use perldoc itself. Type "perldoc perl" to start reading Perl's
standard documentation.
Check the Perl Frequently Asked Questions (FAQ)
Checking the FAQ before posting is required in Big 8 newsgroups in
general, there is nothing clpmisc-specific about this requirement.
You are expected to do this in nearly all newsgroups.
You can use the "-q" switch with perldoc to do a word search of the
questions in the Perl FAQs.
Check the other standard Perl docs (*.pod)
The perl distribution comes with much more documentation than is
available for most other newsgroups, so in clpmisc you should also
see if you can find an answer in the other (non-FAQ) standard docs
before posting.
It is *not* required, or even expected, that you actually *read* all of
Perl's standard docs, only that you spend a few minutes searching them
before posting.
Try doing a word-search in the standard docs for some words/phrases
taken from your problem statement or from your very carefully worded
"Subject:" header.
Really Really Should
This section describes things that you *really should* do before posting
to clpmisc.
Lurk for a while before posting
This is very important and expected in all newsgroups. Lurking means
to monitor a newsgroup for a period to become familiar with local
customs. Each newsgroup has specific customs and rituals. Knowing
these before you participate will help avoid embarrassing social
situations. Consider yourself to be a foreigner at first!
Search a Usenet archive
There are tens of thousands of Perl programmers. It is very likely
that your question has already been asked (and answered). See if you
can find where it has already been answered.
One such searchable archive is:
http://groups.google.com/advanced_group_search
If You Like
This section describes things that you *can* do before posting to
clpmisc.
Check Other Resources
You may want to check in books or on web sites to see if you can
find the answer to your question.
But you need to consider the source of such information: there are a
lot of very poor Perl books and web sites, and several good ones
too, of course.
Posting to comp.lang.perl.misc
There can be 200 messages in clpmisc in a single day. Nobody is going to
read every article. They must decide somehow which articles they are
going to read, and which they will skip.
Your post is in competition with 199 other posts. You need to "win"
before a person who can help you will even read your question.
These sections describe how you can help keep your article from being
one of the "skipped" ones.
Is there a better place to ask your question?
Question should be about Perl, not about the application area
It can be difficult to separate out where your problem really is,
but you should make a conscious effort to post to the most
applicable newsgroup. That is, after all, where you are the most
likely to find the people who know how to answer your question.
Being able to "partition" a problem is an essential skill for
effectively troubleshooting programming problems. If you don't get
that right, you end up looking for answers in the wrong places.
It should be understood that you may not know that the root of your
problem is not Perl-related (the two most frequent ones are CGI and
Operating System related), so off-topic postings will happen from
time to time. Be gracious when someone helps you find a better place
to ask your question by pointing you to a more applicable newsgroup.
How to participate (post) in the clpmisc community
Carefully choose the contents of your Subject header
You have 40 precious characters of Subject to win out and be one of
the posts that gets read. Don't waste them. Take care while
composing them, they are the key that opens the door to getting an
answer.
Spend them indicating what aspect of Perl others will find if they
should decide to read your article.
Do not spend them indicating "experience level" (guru, newbie...).
Do not spend them pleading (please read, urgent, help!...).
Do not spend them on non-Subjects (Perl question, one-word
Subject...)
For more information on choosing a Subject see "Choosing Good
Subject Lines":
http://www.cpan.org/authors/id/D/DM/DMR/subjects.post
Part of the beauty of newsgroup dynamics, is that you can contribute
to the community with your very first post! If your choice of
Subject leads a fellow Perler to find the thread you are starting,
then even asking a question helps us all.
Use an effective followup style
When composing a followup, quote only enough text to establish the
context for the comments that you will add. Always indicate who
wrote the quoted material. Never quote an entire article. Never
quote a .signature (unless that is what you are commenting on).
Intersperse your comments *following* each section of quoted text to
which they relate. Unappreciated followup styles are referred to as
"top-posting", "Jeopardy" (because the answer comes before the
question), or "TOFU" (Text Over, Fullquote Under).
Reversing the chronology of the dialog makes it much harder to
understand (some folks won't even read it if written in that style).
For more information on quoting style, see:
http://web.presby.edu/~nnqadmin/nnq/nquote.html
Speak Perl rather than English, when possible
Perl is much more precise than natural language. Saying it in Perl
instead will avoid misunderstanding your question or problem.
Do not say: I have variable with "foo\tbar" in it.
Instead say: I have $var = "foo\tbar", or I have $var = 'foo\tbar',
or I have $var = <DATA> (and show the data line).
Ask perl to help you
You can ask perl itself to help you find common programming mistakes
by doing two things: enable warnings (perldoc warnings) and enable
"strict"ures (perldoc strict).
You should not bother the hundreds/thousands of readers of the
newsgroup without first seeing if a machine can help you find your
problem. It is demeaning to be asked to do the work of a machine. It
will annoy the readers of your article.
You can look up any of the messages that perl might issue to find
out what the message means and how to resolve the potential mistake
(perldoc perldiag). If you would like perl to look them up for you,
you can put "use diagnostics;" near the top of your program.
Do not re-type Perl code
Use copy/paste or your editor's "import" function rather than
attempting to type in your code. If you make a typo you will get
followups about your typos instead of about the question you are
trying to get answered.
Provide enough information
If you do the things in this item, you will have an Extremely Good
chance of getting people to try and help you with your problem!
These features are a really big bonus toward your question winning
out over all of the other posts that you are competing with.
First make a short (less than 20-30 lines) and *complete* program
that illustrates the problem you are having. People should be able
to run your program by copy/pasting the code from your article. (You
will find that doing this step very often reveals your problem
directly. Leading to an answer much more quickly and reliably than
posting to Usenet.)
Describe *precisely* the input to your program. Also provide example
input data for your program. If you need to show file input, use the
__DATA__ token (perldata.pod) to provide the file contents inside of
your Perl program.
Show the output (including the verbatim text of any messages) of
your program.
Describe how you want the output to be different from what you are
getting.
If you have no idea at all of how to code up your situation, be sure
to at least describe the 2 things that you *do* know: input and
desired output.
Do not provide too much information
Do not just post your entire program for debugging. Most especially
do not post someone *else's* entire program.
Do not post binaries, HTML, or MIME
clpmisc is a text only newsgroup. If you have images or binaries
that explain your question, put them in a publically accessible
place (like a Web server) and provide a pointer to that location. If
you include code, cut and paste it directly in the message body.
Don't attach anything to the message. Don't post vcards or HTML.
Many people (and even some Usenet servers) will automatically filter
out such messages. Many people will not be able to easily read your
post. Plain text is something everyone can read.
Social faux pas to avoid
The first two below are symptoms of lots of FAQ asking here in clpmisc.
It happens so often that folks will assume that it is happening yet
again. If you have looked but not found, or found but didn't understand
the docs, say so in your article.
Asking a Frequently Asked Question
It should be understood that you may have missed the applicable FAQ
when you checked, which is not a big deal. But if the Frequently
Asked Question is worded similar to your question, folks will assume
that you did not look at all. Don't become indignant at pointers to
the FAQ, particularly if it solves your problem.
Asking a question easily answered by a cursory doc search
If folks think you have not even tried the obvious step of reading
the docs applicable to your problem, they are likely to become
annoyed.
If you are flamed for not checking when you *did* check, then just
shrug it off (and take the answer that you got).
Asking for emailed answers
Emailed answers benefit one person. Posted answers benefit the
entire community. If folks can take the time to answer your
question, then you can take the time to go get the answer in the
same place where you asked the question.
It is OK to ask for a *copy* of the answer to be emailed, but many
will ignore such requests anyway. If you munge your address, you
should never expect (or ask) to get email in response to a Usenet
post.
Ask the question here, get the answer here (maybe).
Beware of saying "doesn't work"
This is a "red flag" phrase. If you find yourself writing that,
pause and see if you can't describe what is not working without
saying "doesn't work". That is, describe how it is not what you
want.
Sending a "stealth" Cc copy
A "stealth Cc" is when you both email and post a reply without
indicating *in the body* that you are doing so.
Be extra cautious when you get upset
Count to ten before composing a followup when you are upset
This is recommended in all Usenet newsgroups. Here in clpmisc, most
flaming sub-threads are not about any feature of Perl at all! They
are most often for what was seen as a breach of netiquette. If you
have lurked for a bit, then you will know what is expected and won't
make such posts in the first place.
But if you get upset, wait a while before writing your followup. I
recommend waiting at least 30 minutes.
Count to ten after composing and before posting when you are upset
After you have written your followup, wait *another* 30 minutes
before committing yourself by posting it. You cannot take it back
once it has been said.
AUTHOR
Tad McClellan <tadmc@augustmail.com> and many others on the
comp.lang.perl.misc newsgroup.
------------------------------
Date: 11 Aug 2006 00:08:43 -0700
From: praveen.kantharajapura@gmail.com
Subject: Reading integer values from a file
Message-Id: <1155280123.344837.228130@i3g2000cwc.googlegroups.com>
Hi all,
I have a text file the format is shown below:
*** Lib cond : worst *** Ref phase : RISE *** SETUP ***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE -134
*** Lib cond : best*** Ref phase : RISE *** SETUP***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE 150
*** Lib cond : worst *** Ref phase : RISE *** SETUP ***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE -150
*** Lib cond : best*** Ref phase : RISE *** SETUP ***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE 200
*** Lib cond : worst *** Ref phase : RISE *** SETUP ***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE -170
*** Lib cond : best*** Ref phase : RISE *** SETUP ***
start point start edge end edge slack
------------- --------- ---------- -------
xi_mb0_dq[20] RISE RISE 220
Now i should read the slack values in to two arrays on the following
conditions.
@worst_setup=(-134,-150,-170) if it is worst SETUP
@best_setup=(150,200,220) if it is best SETUP
Thanks in advance,
Praveen
------------------------------
Date: 11 Aug 2006 07:36:11 GMT
From: anno4000@radom.zrz.tu-berlin.de
Subject: Re: Reading integer values from a file
Message-Id: <4k2qbbFaasn7U1@news.dfncis.de>
<praveen.kantharajapura@gmail.com> wrote in comp.lang.perl.misc:
> Hi all,
>
> I have a text file the format is shown below:
>
> *** Lib cond : worst *** Ref phase : RISE *** SETUP ***
> start point start edge end edge slack
> ------------- --------- ---------- -------
> xi_mb0_dq[20] RISE RISE -134
>
> *** Lib cond : best*** Ref phase : RISE *** SETUP***
> start point start edge end edge slack
> ------------- --------- ---------- -------
> xi_mb0_dq[20] RISE RISE 150
[data trimmed]
> Now i should read the slack values in to two arrays on the following
> conditions.
>
> @worst_setup=(-134,-150,-170) if it is worst SETUP
>
> @best_setup=(150,200,220) if it is best SETUP
We are not in the business of delivering programs to specification
(not much of a specification, at that).
What have you tried?
Anno
------------------------------
Date: 11 Aug 2006 01:06:27 -0700
From: usenet@DavidFilmer.com
Subject: Re: Reading integer values from a file
Message-Id: <1155283587.659409.160380@74g2000cwt.googlegroups.com>
praveen.kantharajapura@gmail.com wrote:
> [a multiposted question]
This question has been multiposted to Perl.Beginners (the usenet mirror
of the mailing list).
Please ignore and burn this thread.
--
David Filmer (http://DavidFilmer.com)
------------------------------
Date: 11 Aug 2006 11:13:14 +0200
From: Michele Dondi <bik.mido@tiscalinet.it>
Subject: Re: Reading integer values from a file
Message-Id: <efgod2pvctcgdq6dfm65ulk8gh7pvepo0r@4ax.com>
On 11 Aug 2006 00:08:43 -0700, praveen.kantharajapura@gmail.com wrote:
>Now i should read the slack values in to two arrays on the following
>conditions.
>
>@worst_setup=(-134,-150,-170) if it is worst SETUP
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Up to this point it is valid Perl. The rest is not. And "if it is
worst SETUP" does not sound like an unambiguos condition, since it
presumes the knowledge of a notion of goodness (and badness) according
to some criteria, left unspecified.
>@best_setup=(150,200,220) if it is best SETUP
Ditto as above. Although now the condition hinted to above may be
*guessed* as being that the value under the SETUP column is negative,
and positive in this case. (And if it is null?) Thus at the core of
your actual code you may have something like
if ($setup>0) {
push @best_setup, $slack;
} else {
push @worst_setup, $slack;
}
Now, there remains the problem of getting the values of $setup and
$slack. This involves opening a file and parsing it. In this
particular case it should be relatively easy with the tools explained
to you in whichever introductory Perl book/course you're reading. In
any case you may want to read
perldoc -f open
perldoc -f split
perldoc -f m
As an aid, I'll provide a simplified example for parsing a file in the
form
Foo Bar Baz
10 11 12
Foo Bar Baz
7 37 137
Foo Bar Baz
13 14 15
One possible approach, based on the assumption that we can trust the
format of the file itself (otherwise more stringent checks would be in
order) may be:
#!/usr/bin/perl
use strict;
use warnings;
while (<>) {
chomp;
next if /^[\s[:alpha:]]*$/;
my ($foo,$baz)=(split)[0,2]; # or
# my ($foo,undef,$baz)=split;
print "Foo=$foo, Baz=$baz\n";
}
__END__
Here I don't take the hassle of fiddling with the file manually, but I
use the magic ARGV filehandle. Thus you use it by specifying the file
you want to process it on the command line, or feed it from standard
input (leaving the cmd line empty).
HTH,
Michele
--
{$_=pack'B8'x25,unpack'A8'x32,$a^=sub{pop^pop}->(map substr
(($a||=join'',map--$|x$_,(unpack'w',unpack'u','G^<R<Y]*YB='
.'KYU;*EVH[.FHF2W+#"\Z*5TI/ER<Z`S(G.DZZ9OX0Z')=~/./g)x2,$_,
256),7,249);s/[^\w,]/ /g;$ \=/^J/?$/:"\r";print,redo}#JAPH,
------------------------------
Date: 11 Aug 2006 11:15:25 +0200
From: Michele Dondi <bik.mido@tiscalinet.it>
Subject: Re: Reading integer values from a file
Message-Id: <nhiod2dcg5t7gmdopmh6o0n8oilmvcar3j@4ax.com>
On 11 Aug 2006 01:06:27 -0700, usenet@DavidFilmer.com wrote:
>> [a multiposted question]
>
>This question has been multiposted to Perl.Beginners (the usenet mirror
>of the mailing list).
>
>Please ignore and burn this thread.
Oh my! I agree with you on the inconvenience of multiposting, but
isn't your proposed solution a little bit too drastic? How 'bout a
warning to the op, to the effect of *at least* crosspost, if real need
be?
Michele
--
{$_=pack'B8'x25,unpack'A8'x32,$a^=sub{pop^pop}->(map substr
(($a||=join'',map--$|x$_,(unpack'w',unpack'u','G^<R<Y]*YB='
.'KYU;*EVH[.FHF2W+#"\Z*5TI/ER<Z`S(G.DZZ9OX0Z')=~/./g)x2,$_,
256),7,249);s/[^\w,]/ /g;$ \=/^J/?$/:"\r";print,redo}#JAPH,
------------------------------
Date: 11 Aug 2006 09:08:03 GMT
From: anno4000@radom.zrz.tu-berlin.de
Subject: Re: Sort keys in a hash numerically
Message-Id: <4k2vnjFacpmcU1@news.dfncis.de>
Xicheng Jia <xicheng@gmail.com> wrote in comp.lang.perl.misc:
> mickey wrote:
> > Hi,
> >
> > I have a has with keys like
> > Char. 123
> > Char. 721
> > Char. 234
> >
> > and so on, that is a char followed by an integer.
> >
> > I want to iterate over the whole hash in numerical order. At present using
> >
> > foreach my $key(sort (keys %char))
> >
> > sorts them but in lexicographic order. Is there a way in Perl around that?
> >
>
> A solution with the Schwartzian Transform:
>
> my %hash = (
> "Char.123" => "part1",
> "Char.721" => "part2",
> "Char.234" => "part3",
> );
>
> print map { "$_->[0] => $hash{$_->[0]}\n" }
> sort { $a->[1][1] <=> $b->[1][1] }
> map { [ $_, [ split/\./ ] ] }
> keys %hash;
A regex capture instead of split is a little simpler:
print map { "$_->[0] => $hash{$_->[0]}\n" }
sort { $a->[1] <=> $b->[1] }
map { [ $_, /(\d+)/ ] }
keys %hash;
Anno
------------------------------
Date: 11 Aug 2006 10:24:58 +0200
From: Michele Dondi <bik.mido@tiscalinet.it>
Subject: Re: Storing multiple selections
Message-Id: <u7fod2hhn5icefit8otsnlnmm4bqengs34@4ax.com>
On 10 Aug 2006 17:30:32 -0700, "Vivek" <spamvivek@gmail.com> wrote:
>I have an existing script which generates a GUI. In existing GUI, there
>are many parameters which have different options. Currently, one can
>select only one option from the parameters.
>Now, I have to change the script so as to select multiple options for
>one of the parameter.
>I am thinking of storing the options selected by user somewhere and
>then execute each one by ine.
>But, I am not able to transform this into a code. I tried using
>curselection, but it returns the options which were selected just
>before the execution, but I need to store those selected by the user
>from the GUI window.Any suggestions...
Looking at your code, and in particular at the toolkit you're using,
chances are that you may be having the infamous usual bug on line 17.
And as has recently been pointed out, the answer is on line 42.
Michele
--
{$_=pack'B8'x25,unpack'A8'x32,$a^=sub{pop^pop}->(map substr
(($a||=join'',map--$|x$_,(unpack'w',unpack'u','G^<R<Y]*YB='
.'KYU;*EVH[.FHF2W+#"\Z*5TI/ER<Z`S(G.DZZ9OX0Z')=~/./g)x2,$_,
256),7,249);s/[^\w,]/ /g;$ \=/^J/?$/:"\r";print,redo}#JAPH,
------------------------------
Date: 6 Apr 2001 21:33:47 GMT (Last modified)
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Subject: Digest Administrivia (Last modified: 6 Apr 01)
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