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• How can I get a working Data::Alias in Perl 5.12?

  - by Ryan Thompson

  I like Data::Alias. It seems to be broken in 5.12. Can it be fixed? Will it be fixed soon? Is there any nice alternative?

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• How can I print the cookie_jar values in Perl's WWW::Mechanize?

  - by Phill Pafford

  How can I print the values of the cookie/cookie_jar being set? Trying: ##my $cookie_jar=HTTP::Cookies->new(file => "cookie.jar",autosave=>1,ignore_discard=>1); my $cookie_jar=HTTP::Cookies->new(); ## Would like it to be in memory my $agent = WWW::Mechanize->new(cookie_jar => $cookie_jar); ##my $agent =…

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• How do I check to see if a scalar has a compiled regex in it with Perl?

  - by Robert P

  Let's say I have a subroutine/method that a user can call to test some data that (as an example) might look like this: sub test_output { my ($self, $test) = @_; my $output = $self->long_process_to_get_data(); if ($output =~ /\Q$test/) { $self->assert_something(); } else { …

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• How can I persist a large Perl object for re-use between runs?

  - by Alnitak

  I've got a large XML file, which takes over 40 seconds to parse with XML::Simple. I'd like to be able to cache the resulting parsed object so that on the next run I can just retrieve the parsed object and not reparse the whole file. I've looked at using Data::Dumper but the documentation is a bit lacking on how…

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• In perl, how can I call a method whose name I have in a string?

  - by Ryan Thompson

  I'm trying to write some abstract code for searching through a list of similar objects for the first one whose attributes match specific values. In order to do this, I need to call a bunch of accessor methods and check all their values one by one. I'd like to use an abstraction like this: sub verify_attribute { …

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• How can I keep only the first five lines in a Perl scalar?

  - by Mr. Vile

  From any kind of scalar, what regex could I use to match the first five lines of it and discard the rest?

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• How can I modify the directory in a Perl string that has a file path?

  - by imerez

  I have a string that has a file path: $workingFile = '/var/tmp/A/B/filename.log.timestamps.etc'; I want to change the directory path, using two variables to note the old path portion and the new path portion: $dir = '/var/tmp'; $newDir = '/users/asdf'; I'd like to get the following: …

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• Is it possible to mix a named pipe with select in perl?

  - by Haiyuan Zhang

  I need to write a daemon that supposed to have one TCP socket and one named pipe. Usually if I need to implement a multi IO server with "pure" sockets, the select based multi-IO model is always the one I will choose. so does anyone of you have ever used named pipe in select or you can just…

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• How to shift PDF page using perl (CAM::PDF, PDF::API2)?

  - by est

  Hi all, I have a PDF document which I need to shift the pages to the right several inches. I.e like putting a margin on the left hand side of the page. Can either CAM::PDF or PDF::API2 do it? Or is there anyone have experience with it? Thanks.

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• How do I find the difference between normal text and the JSON encoded text in Perl?

  - by sganesh

  I have used JSON::Any in my program to transfer the hash between client and server. I faced one problem, I want to find whether the text (sent by client) is normal text or JSON encoded text. Can anyone please tell me how to find, without checking, I got some error in server side and it…

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• How can I read a file's contents directly with Perl's Net::FTP?

  - by muruga

  I want to get the file from one host to another host. We can get the file using the NET::FTP module. In that module we can use the get method to get the file. But I want the file contents instead of the file. I know that using the read method we can read the file contents. But how do I…

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• How can I speed up my Perl regex matching?

  - by est

  I want to capture several text using the following regex: $text_normal = qr{^(\/F\d+) FF (.*?) SCF SF (.*?) MV (\(.*?)SH$}; A sample of the string is like below: my $text = '/F12345 FF FF this is SCF SF really MV (important stuff SH'; Can that be rewritten to speed up the…

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• How can I get a filename from a path with Perl?

  - by Eric

  I am trying to parse the filename from paths. I have this: my $filepath = "/Users/Eric/Documents/foldername/filename.pdf"; $filepath =~ m/^.*\\(.*[.].*)$/; print "Linux path:"; print $1 . "\n\n"; print "-------\n"; my $filepath = "c:\\Windows\eric\filename.pdf"; $filepath =~…

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• Perl - How to save an handler as an attribute in order to use in outside a module

  - by Zwik

  Ultimately, what I want to do is to start a process in a module and parse the output in real time in another script. What I want to do : Open a process Handler (IPC) Use this attribute outside of the Module How I'm trying to do it and fail : Open the process handler…

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• How do I install Perl's Parse::Lex for ActivePerl?

  - by Nano HE

  Hi I am using ActivePerl 5.10.1 on Win XP. I can't find Lex package from the PPM list. Can I install other package to enable Parse::Lex?

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• How can I get file size in Perl before processing upload request?

  - by zeina

  I want to get file size I'm doing this: my $filename=$query->param("upload_file"); my $filesize = (-s $filename); print "Size: $filesize ";` Yet it is not working. Note that I did not upload the file. I want to check its size before uploading it. So to limit it to…

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• How do I check if a scalar has a compiled regex in it with Perl?

  - by Robert P

  Let's say I have a subroutine/method that a user can call to test some data that (as an example) might look like this: sub test_output { my ($self, $test) = @_; my $output = $self->long_process_to_get_data(); if ($output =~ /\Q$test/) { …

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• How can I check if a Perl array contains a particular value?

  - by Mel

  I am trying to figure out a way of checking for the existence of a value in an array without iterating through the array. I am reading a file for a parameter. I have a long list of parameters I do not want to deal with. I placed these unwanted parameters in…

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• Where should I put common utility functions for Perl .t tests?

  - by zedoo

  I am getting started with Test::More, already have a few .t test scripts. Now I'd like to define a function that will only be used for the tests, but across different .t files. Where's the best place to put such a function? Define another .t without any tests…

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• How do I redirect standard output to a file in Perl? [closed]

  - by rockyurock

  I want to send standard output to the file "my_output.txt" but failed. Here's the output: inside value loop ------------------------------------------------------------ Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 108…

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• How can I get file size in perl before uploading it?

  - by zeina

  I want to get file size I'm doing this: my $filename=$query->param("upload_file"); my $filesize = (-s $filename) ; print "Size: $filesize "; Yet it is not working.Note that I did not upload the file. I want to check its size before uploading it. so…

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• Is it possible to open a pipe-based filehandle which prints to a variable in perl?

  - by blackkettle

  Hi, I know I can do this, ------ open(F,"",\$var); print F "something cool"; close(F); print $var; ------ or this, open(F, "| ./prog1 | ./prog2 tmp.file"); print F "something cool"; close(F); but is it possible to combine these? The…

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• Why is my Perl script that calls FTP all of a sudden failing?

  - by Mel

  I have a script that has been running for over a year and now it is failing: It is creating a command file: open ( FTPFILE, ">get_list"); print FTPFILE "dir *.txt"\n"; print FTPFILE "quit\n"; close FTPFILE; Then I run the system command: …

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• How can I ignore the block content reading in Perl.

  - by Nano HE

  Hello. I plan to ignore the block content which include the start line of "MaterializeU4()" with the subroutin() read_block below. But failed. # Read a constant definition block from a file handle. # void return when there is no data left in…

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• How can I skip some block content while reading in Perl.

  - by Nano HE

  Hello. I plan to skip the block content which include the start line of "MaterializeU4()" with the subroutin() read_block below. But failed. # Read a constant definition block from a file handle. # void return when there is no data left in…

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