Re: Search Tab-delimited file for Null fields

This time I'm trying to read through a tab-delimited text file with the first row containing headers. I want to print out any field/column name where the entire field is null (meaning there is no value for that field for any record in the file). [snip] I'm thinking that if I read each column int

Re: Search Tab-delimited file for Null fields

Debbie Cooper wrote: I'm trying to read through a tab-delimited text file with the first row containing headers. I want to print out any field/column name where the entire field is null (meaning there is no value for that field for any record in the file). I'm thinking that if I read each column

Search Tab-delimited file for Null fields

I'm pretty new to Perl but with the help of this list I've been able to come up with a few helpful scripts. This time I'm trying to read through a tab-delimited text file with the first row containing headers. I want to print out any field/column name where the entire field is null (meaning there

RE: Spam:Re: Error: Scalar found where operator expected

G'day... > This is not related to strict. You always have to use () when > calling methods. Really? /Always/ or only when passing arguments to the method? I've got a method that returns a reference to an object, I often call it without using parentheses. Let me show you what I mean... --- In

Create new "outfile" foreach line in "inputfile"

Hi All, I have a urls.txt file that contains a different url on each line (100 urls). And I have a item_numbers.txt file (100 items). I want to create a new outfile.txt, named w/ the corresponding item_number, each time the urls.txt file passes through the loop. Can someone please let me kno

RE: Spam:RE: Return values from methods on Classes/Objects

G'day! > : Clearly, I'm missing something crucial here... :) > > And so are we. Like the code for the method for > format_cost(), but I imagine that you are not shifting the > object off at the beginning of that subroutine. Right you are... :) Btw... The code was: sub format_cost {

Re: tie variable to function?

JupiterHost.Net wrote: my $time =... # do magic to make $time always return time() print "$time\n"; sleep 3; print "$time\n"; would output: 1101740477 1101740480 Thanks everyone that replied, that is exactly what I was looking for! I beleive I have it now :) I wonder now, is doing this very

Re: tie variable to function?

my $time =... # do magic to make $time always return time() print "$time\n"; sleep 3; print "$time\n"; would output: 1101740477 1101740480 Thanks everyone that replied, that is exactly what I was looking for! I beleive I have it now :) I wonder now, is doing this very resource intensive: When

Re: problem with function

Jenda Krynicky [JK], on Monday, November 29, 2004 at 15:56 (+0100) typed the following: >>my [EMAIL PROTECTED]; JK> my $datenbank = shift(); JK> or JK> my ($datenbank) = @_; heh, this is common mistake, I did it today too, but I found it. I add my suggestion: my $datenbank = $_[0]; --

Signal Handler for Out of Memory Problem

I have written a program that appears to have a memory leak or is using a module with a memory leak. Eventually the system runs out of memory and dies. I need to write a signal handler that intercepts the signal that stops the program and flushes everything in use to free up memory. Does anyone k

perl.beginners Weekly list FAQ posting

NAME beginners-faq - FAQ for the beginners mailing list 1 - Administriva 1.1 - I'm not subscribed - how do I subscribe? Send mail to <[EMAIL PROTECTED]> You can also specify your subscription email address by sending email to (assuming [EMAIL PROTECTED] is your email address):

Re: File manipulation

[please keep on list] [especially when the person you're e-mailing is out of town ;) ] - Show quoted text - On Wed, 24 Nov 2004 09:17:18 -0500, FlashMX <[EMAIL PROTECTED]> wrote: > > Hi Jay, > > I'm getting mixed reviews on how to do this script. I've been told by dumping > the input file to an

Get TRAP Sender´s IP

Hi List, I´m new around and I´m having kind´a difficulty to solve this problem. Well, I´m writing 2 scripts that will be kept in a server. The first one receives SNMP traps on port 162 (duh!) every 10 seconds and it writes something to a file, just for a record. The second script checks, every 30 s

Re: tie variable to function?

JupiterHost.Net wrote: Hello list, I saw this recently on here but can't find the thread and since I'm not sure what the technique is called (tie variable to function?) I'm not sure where to look on perldoc :) What is it called/How do you go about doing it when you have a var that each time is

Re: tie variable to function?

From: "JupiterHost.Net" <[EMAIL PROTECTED]> > I saw this recently on here but can't find the thread and since I'm > not sure what the technique is called (tie variable to function?) I'm > not sure where to look on perldoc :) > > What is it called/How do you go about doing it when you have a var >

Re: tie variable to function?

The technique is called tying, for more details look at: perldoc -f tie You need to be familar with object orientated perl, and I would consider "tie" to be an advanced technique. Drawbacks? Consider the pain to others due to unexpected behaviour. Consider the extra pain to implement it all.

tie variable to function?

Hello list, I saw this recently on here but can't find the thread and since I'm not sure what the technique is called (tie variable to function?) I'm not sure where to look on perldoc :) What is it called/How do you go about doing it when you have a var that each time is used (IE printed or in

Re: Error: Scalar found where operator expected

From: Jonathan Paton <[EMAIL PROTECTED]> > Easy. > > When using strict you must use brackets around subroutine and method > calls... I.E. > > $object->METHOD(args...) > > You need: > > my $message=$pop3->RETR($msg_id); > > Jonathan Paton This is not related to strict. You always have to use (

Re: problem with function

From: "E.Horn" <[EMAIL PROTECTED]> > Hello! > Can someone help me with my programm that does not work. > i do not get the mistake. > The output is always the same, if i use &daten_einlesen("nucleotide") > or > > &daten_einlesen("proteine") there is no difference! > What have I done wrong? > > >

re function....

Thanks a lot Mr Paton! You are right, now it works great! Have a nice day... -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: problem with function

In daten_einlesen() you have: my [EMAIL PROTECTED]; which sets $datenbank to the number of elements in @_ (the arguments to the subroutine). You probably want: my ($datenbank) = @_; Or: my $datenbank = shift; Jonathan Paton -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional co

RE: converting a postscript file to an image or bitmap

[ keep the discussion on the list please ] [ and don't top-post please ] John wrote: > Does that work on a win32 system? > > > I mean gostscript. You mean GhostScript? I dunno, go to their site and check it out. Go to http://www.google.com and enter "ghostscript" and hit the "I'm Feeling Luck

Re: Error: Scalar found where operator expected

Easy. When using strict you must use brackets around subroutine and method calls... I.E. $object->METHOD(args...) You need: my $message=$pop3->RETR($msg_id); Jonathan Paton -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

problem with function

Hello! Can someone help me with my programm that does not work. i do not get the mistake. The output is always the same, if i use &daten_einlesen("nucleotide") or &daten_einlesen("proteine") there is no difference! What have I done wrong? Regards #!/bin/perl -w use strict; use LWP::Simpl

Moving, modifying files and preserving permission's

Hello, I am in the process of migrating our current working environment from Solaris to Linux. This should have been very straight forward if I had a one-to-one mapping of filesystems, but not in my situation. I am moving from a multiple 6GB filesystems to a few 20GB filesystems, which means

Re: Error: Scalar found where operator expected

vishwas bhakit wrote: hello, I had used following line in my code to retrieve message where $msg_id shows id of message retrieved by LIST command. code: my $message=$pop3->RETR $msg_id; # Line No. 30 it is showing me following error Error: Scalar found where operator expected at try.pl

RE: converting a postscript file to an image or bitmap

John wrote: > Is there any script or module to do that job? Image::Magick, which in turn just calls GhostScript to do the conversion. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: sorting with Swartz Transform

Jeremy Kister wrote: Gunnar Hjalmarsson wrote: my @unsorted = ( '5 127.0.0.1', '10 127.0.1.1', '5 27.0.0.1', '6 10.0.0.1', '1 17.0.0.1', '5 209.0.0.1', ); my @sorted = map { $_->[0] } sort { $a->[1] <=> $b->[1]

Error: Scalar found where operator expected

hello, I had used following line in my code to retrieve message where $msg_id shows id of message retrieved by LIST command. code: my $message=$pop3->RETR $msg_id; # Line No. 30 it is showing me following error Error: Scalar found where operator expected at try.pl line 30, near "->RET

Re: map vs foreach

Dear Michael, I am wrong. [SHAME] The output of Benchmark is slowest first... whereas I intuitively thought it would be fastest first. All my conclusions are therefore wrong, although the differences in speed are still surprising. Results may change depending on the version of Perl, I am using

RE: Return values from methods on Classes/Objects

Michael Kraus <[EMAIL PROTECTED]> wrote: : One of my classes has a method called format_cost which takes a : number (integer representing a monetory amount in cents) and : pretties it up for : display as a dollar amount. I.e. format_cost(12) returns : "$1,200.00". : : When I have the functio