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• How can I "store" an operator inside a variable in Perl?

  - by Ricky

  I'm looking for a way to do this in Perl: $a = "60"; $b = "< 80"; if ( $a $b ) { then .... } Here, $b "holds" an operator... can I do this? Maybe some other way?

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• How can I interpolate literal \t and \n in Perl strings?

  - by Michael

  Say I have an environment variable myvar: myvar=\tapple\n When the following command will print out this variable perl -e 'print "$ENV{myvar}"' I will literally have \tapple\n, however, I want those control chars to be evaluated and not escaped. How would I achieve it? In the real world $ENV residing in substitution, but I hope the answer will cover that.

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• How can I process a Perl array element in a shell script?

  - by joe

  For example: In Perl: @array = (1,2,3); system ("/tmp/a.sh @array" ); In my shell script, how do I handle this array in shell script? How do I handle the shell script to receive the arguments, and how do I use that array variable in shell script?

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• How do I search a Perl array for a matching string?

  - by Mike

  What is the smartest way of searching through an array of strings for a matching string in Perl? One caveat, I would like the search to be case-insensitive so "aAa" would be in ("aaa","bbb")

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• What's the deal with all the different Perl 6 equality operators? (==, ===, eq, eqv, ~~, =:=, ...)

  - by raldi

  Perl 6 seems to have an explosion of equality operators. What is =:=? What's the difference between leg and cmp? Or eqv and ===? Does anyone have a good summary?

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• How can I convert a file to an HTML table using Perl?

  - by user329313

  I am trying to write a simple Perl CGI script that: runs a CLI script reads the resulting .out file and converts the data in the file to an HTML table. Here is some sample data from the .out file: 10.255.202.1 2472327594 1720341 10.255.202.21 2161941840 1484352 10.255.200.0 1642646268 1163742 10.255.200.96 1489876452 1023546 10.255.200.26 1289738466 927513 10.255.202.18 1028316222 706959 10.255.200.36 955477836 703926 Any help would be much appreciated.

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• How can I convert connection data lines to block of schemes using Perl?

  - by YoDar

  I'm looking for a way to convert signals connections to a simple scheme or graph. Let's say I have 2 components with 2 line/signals around them: component A: input - S1 output - S2 component B: input - S2 output - S1 This will be the input data file, and the output will be a scheme that shows it as 2 blocks with connecting lines around them or a illustration graph. I'm wondering if an implementation of that exists in Perl's world.

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• Can I open a clustered MQ queue for writing in perl?

  - by JohnMcG

  If I have a Websphere MQ queue defined on another queue manager in the cluster, is there a way I can open it for writing using the perl interface? Everything I've tried brings back mqrc 2085.

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• Which Technology Is More Secure, PERL or PHP? [closed]

  - by Brian

  Hello All I am looking to write an extremely simple "contact us" form that will email the response to me. My two technologies are PERL and PHP. What I am wondering is, which technology is more secure? Any and all opinions will be appreciated. Thanks for reading, and have a great day.

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• Is there any pure perl module to create images and placing text in the image?

  - by chvenkat

  I am looking for the pure perl module for creation of the image file. I went through internet and found some modules GD,Imager,Prima-1.28 but these are all contains 'C' (.c) file and (.h) files. Any help would greatly appreciated?

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• How to plot image data in PERL on Windows?

  - by angaran

  I would like to plot some image binary data on a grayscale matrix-like graph with custom values on axes. I'm using Perl on a Windows machine but I can't fine the right module to do this. I'm already using GD::Graph to plot other type of data but it seems unsuitable for this specific task.

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• How to find the sum of all values from two different arrays in Perl?

  - by HelloWorld

  How to find the sum of all values from two different arrays in Perl? @array1=(1,2,3); @array2=(10,10,10); @sumofarray1and2=?

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• Linux Debuging Issue - What is the useful debugging tool for perl/c++ ? (eclipse or DDD ?)

  - by YoDar

  Hi, I'm wondering what is the best and useful debug tool in Linux environment for Perl/C++ scripts. In related to that, does anyone know the differences between Eclipse to DDD tools? Thank you, YoDar.

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• Is there any pure Perl module to create images and to place text in the image?

  - by chvenkat

  I am looking for the pure Perl module for creation of the image file. I went through internet and found some modules GD, Imager, Prima-1.28 but these are all contains 'C' (.c) file and (.h) files.

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• How can I output a list as comma-separated values in Perl?

  - by Mike

  Let's say I have a list of elements @list=(1,2,3); #desired output 1,2,3 and I want to print them as comma separated values. Most importantly, I do not want the last element to have a comma after it. What is the cleanest way to do this in Perl?

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• How do I match strings in shell-style using Perl?

  - by isch

  How to match strings in shell-style in Perl? For instance: foo* {bar,baz}.smth joe? foobar[0-9]

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• How do i pass null into stdin like this perl code?

  - by acidzombie24

  This is my question and apparently this is the answer. I found you can stdout to null by writing NUL in command prompt so i tried writing < NUL at the end of my argument. No luck. How do i pass in null or do something with the IO locks like that perl code does so i can get my ffmpeg script not locking up after 15 or so seconds?

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• How can I use the match variable $1 following a substitution in Perl?

  - by justintime

  What is the cleanest way of picking up a match variable form a substitution in Perl I sometimes find myself writing s/(something)// ; my $x = $1 ; then I realize that if the s/ / / fails $1 might be carrying over a value from a previous match. So I try my $x = 'defaultvalue' ; if ( s/(something)// ) { $x = $1 ; } Is this the cleanest way of doing it?

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• How do I get a listing of only plain files in a directory using Perl?

  - by Mike

  I'm looking for a way in Perl to list the plain files of a directory. Files only, no directories.

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• How can I pass two lists to a Perl subroutine?

  - by Mike

  Is it possible to pass two lists to a sub in Perl, for example: sub Foo { my(@list1,@list2) = @_; } I know I could make @_ two lists, with each sublist being the desired argument, I'm just wondering if there is a cleaner way

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• How do I get a listing of only files in a directory using Perl?

  - by Mike

  I'm looking for a way in Perl to list the files of a directory. Files only, no directories. Thanks

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• How do I fetch and parse HTML with Perl?

  - by syker

  How do I do the following in Perl in order: a) curl a page and save it to a variable b) parse the value of the variable (which is HTML content) for values I want (ex: the info is kept between tags like ... )

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• How do I create a new thread to make pcap_loop() and gtk_main() compatible?

  - by httpinterpret

  These two functions are both infinite loops, and the programe hangs once called in the same thread. gtk_main(); ... pcap_loop(adhandle, 0, packet_handler, NULL); How do I create a child thread and run pcap_loop(adhandle, 0, packet_handler, NULL); instead?

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• Is the Microsoft Enterprise Library 5.0 Logging Application Block thread safe?

  - by GiddyUpHorsey

  I have some code that will be logging using the Logging Application Block in Enterprise Library 5.0 from different threads. Is the LAB thread safe? Can I log like normal from different threads or will I need to synchronize the logging code so that is only used from one thread at a time?

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• How to change the current selection in a wxListbook from another thread?

  - by George Edison

  How can I change the current selection in a wxListbook from another thread? When I pass the listbook's pointer to the thread and try to change the selection, the app crashes. What is a safe way of doing this? Is there some message I can send to it?

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