Processing files in a directory
Hi Everyone, I have around 2000 files in a directory. During processing of these files, a temp* will be created for each file and its removed after processing that file. If the processing is unsuccessful, temp* file still exists. Can u plz help me to write a script to automate this process using Perl ie., when a temp* file is found (which stays for abt 10 secs max), I hv to move that temp* file to some other folder. Thanks in advance, Satish -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: Processing files in a directory
use the PERL system command. Its a wrapper for system call on your host OS. ex: system(mv $filename $new_location/$filename); susheel On Mon, Nov 10, 2008 at 4:39 PM, Susheel Koushik [EMAIL PROTECTED] wrote: use the PERL system command. Its a wrapper for system call on your host OS. ex: system(rm *.tmp); susheel On Mon, Nov 10, 2008 at 3:32 AM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi Everyone, I have around 2000 files in a directory. During processing of these files, a temp* will be created for each file and its removed after processing that file. If the processing is unsuccessful, temp* file still exists. Can u plz help me to write a script to automate this process using Perl ie., when a temp* file is found (which stays for abt 10 secs max), I hv to move that temp* file to some other folder. Thanks in advance, Satish -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ -- Susheel Koushik M Graduate Student Ira A Fulton School of Engineering Arizona State University -- Susheel Koushik M Graduate Student Ira A Fulton School of Engineering Arizona State University
Re: Processing files in a directory
use the PERL system command. Its a wrapper for system call on your host OS. ex: system(rm *.tmp); susheel On Mon, Nov 10, 2008 at 3:32 AM, [EMAIL PROTECTED] [EMAIL PROTECTED]wrote: Hi Everyone, I have around 2000 files in a directory. During processing of these files, a temp* will be created for each file and its removed after processing that file. If the processing is unsuccessful, temp* file still exists. Can u plz help me to write a script to automate this process using Perl ie., when a temp* file is found (which stays for abt 10 secs max), I hv to move that temp* file to some other folder. Thanks in advance, Satish -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ -- Susheel Koushik M Graduate Student Ira A Fulton School of Engineering Arizona State University
RE: email validation
From: Dermot 2008/11/10 Rob Coops [EMAIL PROTECTED]: On Mon, Nov 10, 2008 at 11:55 AM, Anusha Krishna chand [EMAIL PROTECTED] wrote: Hi All, How to validate an email id using perl regular expression . ... As for how to actually do that... there are a lot of different ways and looking at the RFC822 there are very complex email address posibilities that even many of the major commercial mail servers out there will not accept because they are so extremely rare that it is easier not to bother with them then to try and figure out a way to match them. A full fletched way to match all possible types of email addresses does as far as I am aware not even exist. In any case having a look on cpan http://search.cpan.org/ might help though I think you might be better helped havign a look at the email procject http://emailproject.perl.org/ I was sure that there was an FAQ about this that basically said you can't just for the reasons that Rob has said. Email addresses of all kinds can be valid [EMAIL PROTECTED] is a valid email address according to RFC822 but in practise will probably be undelivered. Formbuilder and HTML::FormFu have email validation pattern. Linux Journal has an article about email validation with RE in PHP. It talks about some of the corner and boundary cases in excruciating detail. It also lists test cases. Perhaps it could be ported to Perl without too much difficulty. http://www.linuxjournal.com/article/9585 Bob McConnell -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
algorithm permute
Hi,
After working fine with Algorithm::Permute module for weeks now,
suddenly I seem to be getting errors.
The particular error is:
$ perl StTrAuto.pl
Can't locate Algorithm/Permute.pm in @INC (@INC contains:
/u/sharan/local/perl/perm_install/lib/perl5/site_perl .) at
StTrAuto.pl line 4.
BEGIN failed--compilation aborted at StTrAuto.pl line 4.
First few lines of code which I thought are causing the issue:
1 #!/usr/bin/perl
2 use warnings;
3 use lib /u/sharan/local/perl/perm_install/lib/perl5/site_perl;
4 use Algorithm::Permute;
The interesting thing is that I have an example code elsewhere and
that works fine.
Again, the first few lines of code from example:
#!/usr/bin/perl
use warnings;
use lib
/u/sharan/local/perl/perm_install/lib/perl5/site_perl;
use Algorithm::Permute;
my @array = (1..4);
Algorithm::Permute::permute { print @array\n } @array;
[EMAIL PROTECTED] = Algorithm::Permute::permute (@array);
Any clues
Regards
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insert keyword
Hi, I have a string that has value delimited by space e.g. 1 2 10 8 etc. I need to add a keyword wherever there is a space. I wrote a small code to try this out: $str = one two three; $str =~ s/\s/x /g; In this case, I am trying to insert x where there is a space. one two three should become one x two x three. But the above example results in: nex twox three (chops off leading o char) The interesting this is that this happens only in debug mode. The regular output is: onex twox three Regards -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
hash slice??
Is there such a thing?
I'm trying to take a HoH and make a reference to a sub-part of the hash.
This doesn't work:
my %sub_hash = $main_hash{'sub_hash'};
I get the following error:
Reference found where even-sized list expected at ./my_buggy_program line 30.
Any quick tips on how to reference and assign this sub-hash?
Thanks,
- Travis
Re: hash slice??
On Mon, Nov 10, 2008 at 09:52, Travis Thornhill
[EMAIL PROTECTED] wrote:
Is there such a thing?
I'm trying to take a HoH and make a reference to a sub-part of the hash.
This doesn't work:
my %sub_hash = $main_hash{'sub_hash'};
I get the following error:
Reference found where even-sized list expected at ./my_buggy_program line 30.
Any quick tips on how to reference and assign this sub-hash?
snip
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
my %name_to_num = (
one = 1,
two = 2,
three = 3,
four = 4,
five = 5,
six = 6
);
#get keys whose values are odd
my @keys = grep { $name_to_num{$_} % 2 } keys %name_to_num;
#make a hash of the odd keys and values with a hash slice
my %odd_name_to_num;
@[EMAIL PROTECTED] = @[EMAIL PROTECTED];
print Dumper \%name_to_num, \%odd_name_to_num;
--
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wonkden.net
The most important skill a programmer can have is the ability to read.
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Re: hash slice??
On Mon, Nov 10, 2008 at 3:52 PM, Travis Thornhill [EMAIL PROTECTED]
wrote:
Is there such a thing?
I'm trying to take a HoH and make a reference to a sub-part of the hash.
This doesn't work:
my %sub_hash = $main_hash{'sub_hash'};
I get the following error:
Reference found where even-sized list expected at ./my_buggy_program line
30.
Any quick tips on how to reference and assign this sub-hash?
Thanks,
- Travis
Hi Travis,
The problem you are facing is that $main_hash{'sub_hash'} does not return a
hash at all but a reference. Which is exactly what perl is telling you. You
can simply tell perl that it should dereference the reference to a hash, you
could do that like this:
#!/usr/bin/perl
use warnings;
use strict;
use Data::Dumper;
my %hash = ( 1 = 'one',
2 = 'two',
3 = { 3.1 = 'three point one',
3.2 = 'three point two' },
4 = 'four' );
my %hash_slice = %{$hash{3}};
print Dumper %hash_slice;
Reagrds,
Rob
Re: email validation
2008/11/10 Rob Coops [EMAIL PROTECTED]: On Mon, Nov 10, 2008 at 11:55 AM, Anusha Krishna chand [EMAIL PROTECTED] wrote: Hi All, How to validate an email id using perl regular expression . ... As for how to actually do that... there are a lot of different ways and looking at the RFC822 there are very complex email address posibilities that even many of the major commercial mail servers out there will not accept because they are so extremely rare that it is easier not to bother with them then to try and figure out a way to match them. A full fletched way to match all possible types of email addresses does as far as I am aware not even exist. In any case having a look on cpan http://search.cpan.org/ might help though I think you might be better helped havign a look at the email procject http://emailproject.perl.org/ I was sure that there was an FAQ about this that basically said you can't just for the reasons that Rob has said. Email addresses of all kinds can be valid [EMAIL PROTECTED] is a valid email address according to RFC822 but in practise will probably be undelivered. Formbuilder and HTML::FormFu have email validation pattern. Perhaps the better solution is to get the user to confirm the email address in a 2nd field. Dp. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
RE: String concatination.
Try:
print abc${string}zyx\n;
or
print abc.$string.zyx\n;
Cheers
Andy
-Original Message-
From: Sureshkumar M (HCL Financial Services)
[mailto:[EMAIL PROTECTED]
Sent: 10 November 2008 15:34
To: beginners@perl.org
Subject: String concatination.
Hi all,
I have a string like below.
$string=ABCD;
While printing , I have to include some extra strings in prefix and
suffix of the stringlike below...
abcABCDxyz
how do I do this.?
actually I tried like below..
print abc$sting\xyz;
But It's not coming as like I expected(abcABCDxyz)
Capgemini is a trading name used by the Capgemini Group of companies which
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RE: Using perl in a Bash-script to extract IP-addresses?
JC Janos wrote:
Hi,
Hello,
I have a file containing IP addresses ranges, their negations, and
comments. E.g.,
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
I need to extract those IPs ranges, rearrange them into a
comma-separated list, e.g.,
1.1.1.1,2.2.2/29,!3.3.3.3,!4.4.4.4/28
I've read that Perl (which I don't know yet at all) is best for
Text
processing like this.
The thing is that I need to do this from within a Bash script, and
assign the comma-separated list to a variable in that Bash script.
$ echo $TEST
$ cat yourfile.txt
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
$ TEST=$(perl -lp0777e'$_=join,,/!?[\d.]+(?:\/\d+)?/g'
yourfile.txt);
echo $TEST
1.1.1.1,2.2.2.2/29,!3.3.3.3,!4.4.4.4/28
Here is an example of the same thing in shell speak just do whatever
you want with. The ipaddy in the loop to purduce the string you
require.
cat ipin.txt |while read inline
do ipaddy=`echo $inline |awk '{print $1 } '`
echo $ipaddy
done
put this in ipin.txt
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
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it from your system. You should not reproduce, distribute, store, retransmit,
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SKY and the SKY marks are trade marks of British Sky Broadcasting Group plc and
are used under licence. British Sky Broadcasting Limited (Registration No.
2906991), Sky Interactive Limited (Registration No. 3554332), Sky-In-Home
Service Limited (Registration No. 2067075) and Sky Subscribers Services Limited
(Registration No. 2340150) are direct or indirect subsidiaries of British Sky
Broadcasting Group plc (Registration No. 2247735). All of the companies
mentioned in this paragraph are incorporated in England and Wales and share the
same registered office at Grant Way, Isleworth, Middlesex TW7 5QD.
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Re: String concatination.
my $string = Hello; $string .= World; print Hello . $string, \n; On Mon, Nov 10, 2008 at 10:34 AM, Sureshkumar M (HCL Financial Services) [EMAIL PROTECTED] wrote: Hi all, I have a string like below. $string=ABCD; While printing , I have to include some extra strings in prefix and suffix of the stringlike below... abcABCDxyz how do I do this.? actually I tried like below.. print abc$sting\xyz; But It's not coming as like I expected(abcABCDxyz) Pls some one help me on this. DISCLAIMER: --- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any mail and attachments please check them for viruses and defect. --- -- [ Rodrick R. Brown ] http://www.rodrickbrown.com http://www.linkedin.com/in/rodrickbrown
Re: Using perl in a Bash-script to extract IP-addresses?
Stewart Anderson wrote:
JC Janos wrote:
I have a file containing IP addresses ranges, their negations, and
comments. E.g.,
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
I need to extract those IPs ranges, rearrange them into a
comma-separated list, e.g.,
1.1.1.1,2.2.2/29,!3.3.3.3,!4.4.4.4/28
I've read that Perl (which I don't know yet at all) is best for
Text
processing like this.
The thing is that I need to do this from within a Bash script, and
assign the comma-separated list to a variable in that Bash script.
Here is an example of the same thing in shell speak just do whatever
you want with. The ipaddy in the loop to purduce the string you
require.
cat ipin.txt |while read inline
do ipaddy=`echo $inline |awk '{print $1 } '`
echo $ipaddy
done
Why not just:
ipaddy=`awk '{ print $1 }' ipin.txt`
But that still doesn't get you a comma-separated list.
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order.-- Larry Wall
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String concatination.
Hi all, I have a string like below. $string=ABCD; While printing , I have to include some extra strings in prefix and suffix of the stringlike below... abcABCDxyz how do I do this.? actually I tried like below.. print abc$sting\xyz; But It's not coming as like I expected(abcABCDxyz) Pls some one help me on this. DISCLAIMER: --- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any mail and attachments please check them for viruses and defect. ---
RE: String concatination.
On Mon, 2008-11-10 at 15:52 +, Taylor, Andrew (ASPIRE) wrote:
Try:
print abc${string}zyx\n;
or
print abc.$string.zyx\n;
Also:
printf abc%sxyz\n, $string;
--
Just my 0.0002 million dollars worth,
Shawn
The map is not the territory,
the dossier is not the person,
the model is not reality,
and the universe is indifferent to your beliefs.
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RE: Using perl in a Bash-script to extract IP-addresses?
From: John W. Krahn [mailto:[EMAIL PROTECTED]
Sent: 10 November 2008 11:26
To: Perl Beginners
Subject: Re: Using perl in a Bash-script to extract IP-addresses?
Stewart Anderson wrote:
JC Janos wrote:
I have a file containing IP addresses ranges, their negations,
and
comments. E.g.,
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
I need to extract those IPs ranges, rearrange them into a
comma-separated list, e.g.,
1.1.1.1,2.2.2/29,!3.3.3.3,!4.4.4.4/28
I've read that Perl (which I don't know yet at all) is best for
Text
processing like this.
The thing is that I need to do this from within a Bash script, and
assign the comma-separated list to a variable in that Bash
script.
Here is an example of the same thing in shell speak just do
whatever
you want with. The ipaddy in the loop to purduce the string you
require.
cat ipin.txt |while read inline
do ipaddy=`echo $inline |awk '{print $1 } '`
echo $ipaddy
done
Why not just:
ipaddy=`awk '{ print $1 }' ipin.txt`
But that still doesn't get you a comma-separated list.
Never said it did, I did suggest to build the string in the loop
Here is an example of the same thing in shell speak just do
whatever
you want with. The ipaddy in the loop to purduce the string you
require.
:)
Information in this email including any attachments may be privileged,
confidential and is intended exclusively for the addressee. The views expressed
may not be official policy, but the personal views of the originator. If you
have received it in error, please notify the sender by return e-mail and delete
it from your system. You should not reproduce, distribute, store, retransmit,
use or disclose its contents to anyone. Please note we reserve the right to
monitor all e-mail communication through our internal and external networks.
SKY and the SKY marks are trade marks of British Sky Broadcasting Group plc and
are used under licence. British Sky Broadcasting Limited (Registration No.
2906991), Sky Interactive Limited (Registration No. 3554332), Sky-In-Home
Service Limited (Registration No. 2067075) and Sky Subscribers Services Limited
(Registration No. 2340150) are direct or indirect subsidiaries of British Sky
Broadcasting Group plc (Registration No. 2247735). All of the companies
mentioned in this paragraph are incorporated in England and Wales and share the
same registered office at Grant Way, Isleworth, Middlesex TW7 5QD.
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Re: email validation
On Mon, Nov 10, 2008 at 11:55 AM, Anusha Krishna chand [EMAIL PROTECTED] wrote: Hi All, How to validate an email id using perl regular expression . First of all it would be nice to see what you tried so far with out that it seems like you are simply using thsi mailing list as a way to cut corners during a school/work assignment rather then actually being intrested in the way the sollution works, or even being willing to bother givving it some thought your self. As for how to actually do that... there are a lot of different ways and looking at the RFC822 there are very complex email address posibilities that even many of the major commercial mail servers out there will not accept because they are so extremely rare that it is easier not to bother with them then to try and figure out a way to match them. A full fletched way to match all possible types of email addresses does as far as I am aware not even exist. In any case having a look on cpan http://search.cpan.org/ might help though I think you might be better helped havign a look at the email procject http://emailproject.perl.org/ Regards, Rob
Re: String concatination.
On Mon, 2008-11-10 at 21:04 +0530, Sureshkumar M (HCL Financial
Services) wrote:
print abc$sting\xyz;
print abc${string}xyz;
--
Just my 0.0002 million dollars worth,
Shawn
The map is not the territory,
the dossier is not the person,
the model is not reality,
and the universe is indifferent to your beliefs.
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email validation
Hi All, How to validate an email id using perl regular expression .
Re: hash slice??
Travis Thornhill wrote:
Is there such a thing?
Yes there is.
I'm trying to take a HoH and make a reference to a sub-part of the hash.
This doesn't work:
my %sub_hash = $main_hash{'sub_hash'};
I get the following error:
Reference found where even-sized list expected at ./my_buggy_program line 30.
Any quick tips on how to reference and assign this sub-hash?
my %sub_hash;
@sub_hash{ 'sub_hash' } = @main_hash{ 'sub_hash' };
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order.-- Larry Wall
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Re: algorithm permute
On Nov 10, 9:15 am, [EMAIL PROTECTED] (Sharan Basappa) wrote:
Hi,
After working fine with Algorithm::Permute module for weeks now,
suddenly I seem to be getting errors.
The particular error is:
$ perl StTrAuto.pl
Can't locate Algorithm/Permute.pm in @INC (@INC contains:
/u/sharan/local/perl/perm_install/lib/perl5/site_perl .) at
StTrAuto.pl line 4.
BEGIN failed--compilation aborted at StTrAuto.pl line 4.
First few lines of code which I thought are causing the issue:
1 #!/usr/bin/perl
2 use warnings;
3 use lib /u/sharan/local/perl/perm_install/lib/perl5/site_perl;
4 use Algorithm::Permute;
The interesting thing is that I have an example code elsewhere and
that works fine.
Again, the first few lines of code from example:
#!/usr/bin/perl
use warnings;
use lib
/u/sharan/local/perl/perm_install/lib/perl5/site_perl;
use Algorithm::Permute;
my @array = (1..4);
Algorithm::Permute::permute { print @array\n } @array;
[EMAIL PROTECTED] = Algorithm::Permute::permute (@array);
Any clues
elsewhere is the problem. Algorithm::Permute is not a built-in
module. You have to install it manually via the CPAN on every machine
you want to use it. Whatever machine you're currently using, you
haven't installed it - or at the very least, you haven't installed it
to /u/sharan/local/perl/perm_install/lib/perl5/site_perl. Try
running
find / -name Permute.pm 2 /dev/null
to see where, if at all, the module is located on this system.
Paul Lalli
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Re: email validation
Anusha Krishna chand wrote:
How to validate an email id using perl regular expression .
This should help you.
Rob
use strict;
use warnings;
use Regexp::Common 'Email::Address';
my $email_re = $RE{Email}{Address};
foreach (
'Anusha Krishna chand [EMAIL PROTECTED]',
'Rob Dixon [EMAIL PROTECTED]',
'beginners@perl.org') {
print $1, \n if /($email_re)/;
}
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Re: hash slice??
Travis Thornhill wrote:
Is there such a thing?
I'm trying to take a HoH and make a reference to a sub-part of the hash.
This doesn't work:
my %sub_hash = $main_hash{'sub_hash'};
I get the following error:
Reference found where even-sized list expected at ./my_buggy_program line 30.
Any quick tips on how to reference and assign this sub-hash?
There is certainly such a thing as a hash slice, but I think it is probably not
what you want here. A slice will let you extract multiple values from the hash
simultaneously, something like
my @subhashes = @main_hash{'key1', 'key2', 'key3'};
and it doesn't look to me like that's what you're trying to achieve.
If you have a hash of hashes then $main_hash{'sub_hash'} is already a reference,
as the error message has told you, so you should write
my $subhash_ref = $main_hash{'sub_hash'};
after which you can access the subsidiary hash with constructs like
foreach my $key (keys %$subhash_ref) {
printf %s = %s\n, $key, $subhash_ref-{$key};
}
HTH,
Rob
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Re: Using perl in a Bash-script to extract IP-addresses?
John W. Krahn wrote:
Why not just:
ipaddy=`awk '{ print $1 }' ipin.txt`
But that still doesn't get you a comma-separated list.
Erm, a Perl list?
Rob
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Re: Help understanding why the RE does not totally work
Rob Dixon wrote: Jack Gates wrote: On Friday 26 September 2008 02:52:45 pm Rob Dixon wrote: Jack Gates wrote: On Friday 26 September 2008 01:20:29 pm Rob Dixon wrote: Jack Gates wrote: s!(|/)([^\!][A-Z0-9 ]+)!$1\L$2\E!g; or s/(|\/)([^!][A-Z0-9 ]+)/$1\L$2\E/g; The RE above captures and replaces all HTML tags with lowercase as desired except for any tag that has only one letter such as P, B or I It will get the /B, /P and /I It properly ignores the !DOCTYPE tag What is the correct way to write the above RE? HTML tag names can't contain spaces, so you want s|(/?)([A-Z][A-Z0-9]*)|$1\L$2|g; Thanks for the effort. Your RE does not work as well as what I have. HTML tags can contain spaces. You forgot about p id=something class=something No, I didn't. The tag name is 'p' and it has no spaces in it. The tag has two attributes named 'id' and 'class'. They don't have spaces in them either. If you prefer yours that doesn't work on tags with single-character names just because it happens to also modify the first attribute name then go ahead and use it. I'm pretty sure there is no simple way to change the case of a tag's name and all its attribute names while leaving the attribute values intact. I was not talking about the HTML tag name but the entire tag which includes everything in it. And yes I have a RE that does exactly what I want with John's help. Rob, PLEASE STOP CCing ME. I am subscribed to the list. That's fine, I shall stop trying to help you altogether. You are very rude and don't want to accept correction. I am posting this again for the consideration of the moderators. This is the worst example of asking for help I have ever seen. Jack: - The resolution that you chose was crude and applicable only to your example - You don't appear to understand what an HTML tag name is - You asked and got very good free help. To expect to fine-tune the presentation of that help without paying a thing is pompous in the extreme Rob -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
