FAQ

Perl > beginners > September 2013

Search Discussions

26 discussions - 143 posts

  • hello, following is obtained by concatenating 3 values using an underscore to produce a list: abc_12_4567 xy4z_xtr4_sdf PQRSDR_xcvf_scc234 i want them to look neat, something like this: where they ...
    Rajeev PrasadRajeev Prasad
    Sep 28, 2013 at 5:59 am
    Oct 2, 2013 at 3:30 pm
  • Hello! Is there a shorter way to write $a = ! $a, please? Something analogous to ++ and -- operators like $a !! or !! $a would negate the variable $a and return its previous or new value ...
    Hans GinzelHans Ginzel
    Sep 9, 2013 at 9:00 am
    Sep 13, 2013 at 2:36 am
  • beginners: I'm looking for a hash function and a related function or operator such that: H(string1 . string2) = f(H(string1), H(string2)) H(string1 . string2) = H(string1) op H(string2) where: H() is ...
    David ChristensenDavid Christensen
    Sep 23, 2013 at 10:17 pm
    Sep 27, 2013 at 4:32 pm
  • Dear Perlers, I am saving the data structure to a file and retrieving it back again, but, when I 'use strict' it is giving the following error message Global symbol "%game" requires explicit package ...
    *Shaji Kalidasan**Shaji Kalidasan*
    Sep 13, 2013 at 11:11 am
    Sep 14, 2013 at 4:43 pm
  • Hi all, I'm having a look at Perl 6 syntax and I don't get the rationale in having different sigils for scalars, hashes and arrays while having a scalar access being with the same type sigil. In ...
    Luca FerrariLuca Ferrari
    Sep 23, 2013 at 3:19 pm
    Sep 29, 2013 at 1:35 pm
  • Hi, all. I am a very begginer in PERL starting today in this mailing list! :-) I will try to work especially with Bioinformatics. I am trying to verify the existence of a file in PERL; however, is ...
    RENATO AUGUSTO CORREA DOS SANTOSRENATO AUGUSTO CORREA DOS SANTOS
    Sep 25, 2013 at 7:38 pm
    Sep 27, 2013 at 1:30 pm
  • I have this: while (<IN ) { chomp; next if /^#/; # do stuff } It skips to the next item in the while loop of the string begins with # and works fine. I would also like to skip to the next item in the ...
    MattMatt
    Sep 3, 2013 at 5:09 pm
    Sep 4, 2013 at 9:29 am
  • Hi, In the example below, how do I pass @pets and @numbers into the subroutine so that @animals = @pets and @digits = @numbers. Thanks my @pets = ('dogs' , 'cats' , 'horses'); my @numbers = (1..10) ...
    EventualEventual
    Sep 7, 2013 at 11:14 am
    Sep 7, 2013 at 1:24 pm
  • If my perl script has a sleep for say 300 seconds, when the sleep is being run is there any way i can find the time remaining in the sleep say by sending a signal? Thanks,
    Unknown UserUnknown User
    Sep 15, 2013 at 8:00 pm
    Sep 16, 2013 at 4:47 pm
  • Hello all, I am writing a script to rename files. The script prompts the user to enter tokens which will comprise part of the file name. These are made of letters and numbers separated by a dot, ie ...
    John AtenJohn Aten
    Sep 3, 2013 at 1:23 am
    Sep 4, 2013 at 12:25 pm
  • Hi! While I'm not a beginner with Perl it seems that I'm somewhat a beginner if it comes to compilation: I try to compile 5.18.0 on my RHEL 6.4 system. Primarily in order to be able to use Padre ...
    Alexander KarnerAlexander Karner
    Sep 18, 2013 at 1:02 pm
    Sep 19, 2013 at 12:51 pm
  • Does perl have a way to raise a error in module/class then from caller use Try::Tiny etc to catch them? Thanks.
    Ken PengKen Peng
    Sep 26, 2013 at 1:45 am
    Sep 26, 2013 at 6:49 am
  • Posted below is a shortened down version of a larger script that tries to show the phenomena I'm seeing and don't understand. I'm running rsync from a perl script so I first thought the output was ...
    Harry PutnamHarry Putnam
    Sep 11, 2013 at 10:08 pm
    Sep 11, 2013 at 10:27 pm
  • Hi, i have implemented 50 shell program to test. now i want to run all these shell program one by one(in short test automation) (once first program getting executed then next will start). please let ...
    Lalit DeshmukhLalit Deshmukh
    Sep 10, 2013 at 8:25 am
    Sep 10, 2013 at 3:17 pm
  • Dear Perlers, I need some resources (tutorials/documents) with some basic examples on Multi threading for my understanding as I need to write a task which makes use of threads. Any pointers to ...
    *Shaji Kalidasan**Shaji Kalidasan*
    Sep 4, 2013 at 3:57 pm
    Sep 5, 2013 at 2:06 pm
  • In my web-app there is a HTML screen which provides the facility to select and download documents. If user selects some documents (using checkbox) and submits the form then then all of his selected ...
    Chankey PathakChankey Pathak
    Sep 4, 2013 at 9:50 am
    Sep 5, 2013 at 4:25 am
  • Somehow I had it my mind that perl would recognize an incoming variable to a sub routine like: sub test($var) As $_ if there was only one element to @_, But I see from testing that, no, not true ...
    Harry PutnamHarry Putnam
    Sep 24, 2013 at 1:23 pm
    Sep 24, 2013 at 3:33 pm
  • Hi, in my applications often I end up with an hash ref that contains array refs, and each time I have to insert a new element in the array for a specific key I write something like: if ( ! exists ...
    Luca FerrariLuca Ferrari
    Sep 23, 2013 at 12:12 pm
    Sep 23, 2013 at 1:22 pm
  • Hi, I am reading a set of regex, separated by comma, from database, which is in string format and using eval to convert them in the array. For e.g., String from database is 'qr/^abc .* $/,qr/xxx/' ...
    Rajesh kumarRajesh kumar
    Sep 19, 2013 at 6:10 pm
    Sep 19, 2013 at 6:36 pm
  • Hi everyone.. I am running a perl program which uses Math::Vector. But i am getting the following error Can't locate object method "UnitVecPoints" via package "Math::Vector" at ...
    Gurunath KatagiGurunath Katagi
    Sep 12, 2013 at 10:54 am
    Sep 15, 2013 at 2:31 pm
  • Hi All, I'm looking for some good documentation on how to handle multiple tcp connections at the same time. Already have the book Network Programming with Perl (Lincoln D. Stein) Having a client / ...
    Marco van KammenMarco van Kammen
    Sep 4, 2013 at 9:40 am
    Sep 4, 2013 at 10:57 am
  • I use emacs/gnus as my newsreader. In gnus you can select msgs and then run shell cmds on that selected content. I want to know how to take user input during that action. That is, I run a perl script ...
    Harry PutnamHarry Putnam
    Sep 29, 2013 at 10:47 pm
    Sep 29, 2013 at 11:09 pm
  • I have an array of numbers, and i want to find the percentage difference between all the elements. Say my @a = ($a,$b,$c); I need to calculate the percentage difference of element a with b, b with c ...
    Unknown UserUnknown User
    Sep 15, 2013 at 10:48 pm
    Sep 16, 2013 at 2:50 pm
  • I have this simple script to automatically print HTML selection option. #!/usr/bin/env perl use strict; for (reverse(1943 .. 1991)){ print "\<option value=\"$_\" $_\<\/option\ \n"; } I need to print ...
    MimicafeMimicafe
    Sep 16, 2013 at 1:36 pm
    Sep 16, 2013 at 1:51 pm
  • <http://stackoverflow.com/questions/18809731/mysql-perl-and-latex-trying-to-loop-through-results-by-day-as-a-latex-sectio# I have written a Perl script (shown below) to loop through my MySQL database ...
    J MJ M
    Sep 15, 2013 at 7:16 am
    Sep 15, 2013 at 8:15 am
  • Hi! I'm writing a simple script to output data from a MySQL database... Eventually I'd like to pipe it all into a .tex file and make a custom pdf out of it. However, I'm running into a problem: the ...
    J MJ M
    Sep 5, 2013 at 12:28 am
    Sep 5, 2013 at 12:45 am
Sep 2013
Group Navigation
period‹ prev | Sep 2013 | next ›
Group Overview
groupbeginners @
categoriesperl
discussions26
posts143
users54
websiteperl.org

54 users for September 2013

David Christensen: 10 posts Shlomi Fish: 9 posts Rob Dixon: 8 posts *Shaji Kalidasan*: 7 posts Harry Putnam: 6 posts Logust Yu: 6 posts Shawn H Corey: 6 posts Andy Bach: 5 posts Dr.Ruud: 5 posts John W. Krahn: 5 posts Luca Ferrari: 5 posts Alexander Karner: 3 posts Brian Fraser: 3 posts Chankey Pathak: 3 posts Jim Gibson: 3 posts J M: 3 posts Nathan Hilterbrand: 3 posts RENATO AUGUSTO CORREA DOS SANTOS: 3 posts David Precious: 2 posts Ed Davis: 2 posts
show more
Archives