Re: Extracting a bit of a scalar variable

On Apr 21, 2006, at 20:59, Praveena Vittal wrote: Is there any way to print a particular bit of a digit after converting to binary form. That can be easily done with substr y sprintf, this would take the second bit of 7 written in base 2: % perl -wle 'print substr sprintf("%b", 7), -2,

Re: strange errormessage from script run in cron

On Thursday 20 April 2006 23:31, John W. Krahn wrote: > Bjørge Solli wrote: > > On Thursday 20 April 2006 12:01, John W. Krahn wrote: > >>Bjørge Solli wrote: > >>>I have this as a part of my script: > >>> > >>>$ncfile = `ls -1 $mersea_cat | head -1`; > >>>print $ncfile; > >>> > >>>It prints

Average from array of arrays

Hi all, Sorta newbie here... I have parsed log files and have an array of arrays that looks like this: [...] 1 0.0 0.000 31.954 36.169 12.645 20:40 16 1048.0 16.196 15.825 52.502 5.150 20:40 8 1281.7 12.059 9.634 41.264 4.869 20:40 9 1157.7 19.094 16.889 52.218 4.742 20:40 0 0.0 0.000 76.430 10

Re: arguments

On Thu, 2006-20-04 at 20:54 -0400, Tom Allison wrote: > Maybe I'm getting old, but I'm starting to thing that if there is a > method/sub/function/whatever that has more than one argument, one should > always > pass the args as a hash reference. This eliminates the problems of getting > the >

Re: print_r

> "Johannes" == Johannes Ernst writes: Johannes> Some time ago I asked about a print_r implementation in Perl. Johannes> print_r: print object structures recursively, as in PHP, see http:// Johannes> php.net/print_r Johannes> Because nobody seemed to have a good answer, we built our own. It

Re: print_r

On Thu, 2006-20-04 at 23:14 -0700, Johannes Ernst wrote: > Some time ago I asked about a print_r implementation in Perl. > > print_r: print object structures recursively, as in PHP, see http:// > php.net/print_r > > Because nobody seemed to have a good answer, we built our own. It has > some i

Re: Average from array of arrays

On Thu, 2006-20-04 at 20:55 -0600, The Other1 wrote: > My question is how to walk through the array grabbing column 1 of four rows, > pass those values to the Average function (or if there is a beter way, I am > open to it!), store the average to be used by GD later, then do the next > column, e

Handeling huge hashes.

Good day list, I hope there is someone out there that can point me in the right direction to find a solution for this. I have two quite large hashes each are several hundreds of MB's in size, now I want to with some logic merge these into a single hash. I this works of course but as one might ima

Re: Extracting a bit of a scalar variable

Praveena Vittal schreef: > I am newbie to PERL. ITYM: Perl. > I think this is a very simple question to ask. Well, let's see. > Is there any way to print a particular bit of a digit after converting > to binary form. Why convert anything "to binary" first, if you can use "$var & (1 << $bitp

regular expressions

In perldoc under this topic s is listed as "Treat string as a single line" and m as Treat string as multiples lines". If I have text that has varying spaces at the begging of each line, and I use $string =~ s/^\s+//; It will remove the spaces from in from of the first line but not any other l

Re: Handeling huge hashes.

On Fri, 2006-21-04 at 14:39 +0200, Rob Coops wrote: > Good day list, > > I hope there is someone out there that can point me in the right direction > to find a solution for this. > > I have two quite large hashes each are several hundreds of MB's in size, now > I want to with some logic merge the

Re: regular expressions

On Apr 21, 2006, at 16:10, Bowen, Bruce wrote: In perldoc under this topic s is listed as "Treat string as a single line" and m as Treat string as multiples lines". If I have text that has varying spaces at the begging of each line, and I use $string =~ s/^\s+//; It will remove the space

RE: Extracting a bit of a scalar variable

Original Message- From: Dr.Ruud [mailto:[EMAIL PROTECTED] Sent: Friday, April 21, 2006 9:19 AM To: beginners@perl.org Subject: Re: Extracting a bit of a scalar variable Praveena Vittal schreef: > I am newbie to PERL. ITYM: Perl. > I think this is a very simple question to ask. Well,

Re: Handeling huge hashes.

Rob Coops schreef: > I have two quite large hashes each are several hundreds of MB's in > size, now I want to with some logic merge these into a single hash. I > this works of course but as one might imagine this takes quite a lot > of memory. And can depending on the machine simply run out of mem

Re: arguments

"Mr. Shawn H. Corey" schreef: > Tom Allison: >> Maybe I'm getting old, but I'm starting to thing that if there is a >> method/sub/function/whatever that has more than one argument, one >> should always pass the args as a hash reference. This eliminates >> the problems of getting the variables out

RE: Extracting a bit of a scalar variable

-Original Message- From: Smith, Derek Sent: Friday, April 21, 2006 10:22 AM To: Perl Beginners Subject: RE: Extracting a bit of a scalar variable Original Message- From: Dr.Ruud [mailto:[EMAIL PROTECTED] Sent: Friday, April 21, 2006 9:19 AM To: beginners@perl.org Subject: Re: E

Re: Average from array of arrays

The Other1 wrote: > Hi all, Hello, > Sorta newbie here... > > I have parsed log files and have an array of arrays that looks like this: > > [...] > 1 0.0 0.000 31.954 36.169 12.645 20:40 > 16 1048.0 16.196 15.825 52.502 5.150 20:40 > 8 1281.7 12.059 9.634 41.264 4.869 20:40 > 9 1157.7 19.094 16

Re: print_r

Many people indeed suggested Data::Dumper, in fact I did so myself in my original message when I asked: http://www.nntp.perl.org/group/perl.beginners/81554 The problem with Data::Dumper is that it is way too low-level for most application-level debugging, e.g. as I said then: "(I don't w

How to prevent duplicate cron jobs?

I have a cron job running perl and it is taking a very long time -- sometimes over 24 hours. How can I have cron schedule my job daily, or even hourly, and have the perl code exit if a previouse instance of the job is still running? Some have suggested creating a file in /tmp and checking it bef

Re: regular expressions

Bowen, Bruce wrote: > In perldoc under this topic s is listed as "Treat string as a single > line" and m as Treat string as multiples lines". > > If I have text that has varying spaces at the begging of each line, > and I use > > $string =~ s/^\s+//; It will remove the spaces from in from of th

Re: Extracting a bit of a scalar variable

On Friday 21 April 2006 10:15, Smith, Derek wrote: > -Original Message- > From: Smith, Derek > Sent: Friday, April 21, 2006 10:22 AM > To: Perl Beginners > Subject: RE: Extracting a bit of a scalar variable > > > Original Message- > From: Dr.Ruud [mailto:[EMAIL PROTECTED] > Sent: Fr

Re: How to prevent duplicate cron jobs?

siegfried wrote: > I have a cron job running perl and it is taking a very long time -- > sometimes over 24 hours. > > How can I have cron schedule my job daily, or even hourly, and have the perl > code exit if a previouse instance of the job is still running? > > Some have suggested creating a f

RE: How to prevent duplicate cron jobs?

> I have a cron job running perl and it is taking a very long time -- > sometimes over 24 hours. > > How can I have cron schedule my job daily, or even hourly, > and have the perl > code exit if a previouse instance of the job is still running? > > Some have suggested creating a file in /tmp

RE: print_r

Johannes Ernst wrote: : I also realize that Cpan exists ;-) but that this piece of code : isn't quite ready to go into Cpan, which is why I didn't put it : there. I'm only posting this in the hope that somebody, one day, : may think it could be marginally useful. That's all. I'm making : no claims

Re: golf

Chad Perrin wrote: This is kind of a frivolous question, but . . . is there some way to golf this? while (<>) { s/\n/ /; print; } How about print/(.*)\n/while<> ? -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: golf

Chad Perrin wrote: This is kind of a frivolous question, but . . . is there some way to golf this? while (<>) { s/\n/ /; print; } Oops, I misread that as s/\n//; Sorry :'( -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]

Re: print_r

On Friday 21 April 2006 11:53, Charles K. Clarkson wrote: > BTW, I think indent() could be rewritten. I think these do > the same thing as your indent(). > > sub indent { > my $indent = shift; > return '' unless defined $indent; > return '' x $indent; > } > > # Or: > > sub inde

Re: golf

M. Kristall wrote: > Chad Perrin wrote: >> This is kind of a frivolous question, but . . . is there some way to >> golf this? >> >> while (<>) { >> s/\n/ /; >> print; >> } > > How about > print/(.*)\n/while<> You probably meant: print/.*/g,$"while<> :-) John -- use Perl; program fulfi

RE: How to prevent duplicate cron jobs?

On Fri, 2006-21-04 at 14:48 -0400, Lewis, Cory (Genworth) wrote: > > > I have a cron job running perl and it is taking a very long time -- > > sometimes over 24 hours. > > > > How can I have cron schedule my job daily, or even hourly, > > and have the perl > > code exit if a previouse instance

Re: How to prevent duplicate cron jobs?

From: "siegfried" <[EMAIL PROTECTED]> > I have a cron job running perl and it is taking a very long time -- > sometimes over 24 hours. > > How can I have cron schedule my job daily, or even hourly, and have the perl > code exit if a previouse instance of the job is still running? > > Some have su

Re: How to prevent duplicate cron jobs?

siegfried wrote: I have a cron job running perl and it is taking a very long time -- sometimes over 24 hours. How can I have cron schedule my job daily, or even hourly, and have the perl code exit if a previouse instance of the job is still running? perldoc Unix::PID # job.pl that gets cro

Re: golf

On Fri, Apr 21, 2006 at 12:48:51PM -0700, John W. Krahn wrote: > > print/.*/g,$"while<> Woah, that's pretty short. Thanks. Now I just need to go read a bit and figure out how exactly it works. . . . unless you want to explain it. -- Chad Perrin [ CCD CopyWrite | http://ccd.apotheon.org ] "Th

[regexp] Multi-level pattern matching

Hello List, I'm writing a little script that will turn some webpages I have from HTML to XHTML. This requires several substitutions. So far, I have been able to write regexps that properly close link, meta, br, and hr tags and either put in or replace an existing tag. Finally, I want it t

RE: How to prevent duplicate cron jobs? On windows?

I apologize, I forgot to mention something very important: I am using cygwin's cron on Win2003 Server. I tried using Unix::PID but ppm.bat for ActiveState Perl could not find it. Sieg -Original Message- From: JupiterHost.Net [mailto:[EMAIL PROTECTED] Sent: Friday, April 21, 2006 2:45 PM

RE: How to prevent duplicate cron jobs? On windows?

If you are using cygwin, then why don't you use the perl in cygwin instead of using activestate? Then you can install cpan modules directly using cygwin. On Fri, 2006-04-21 at 16:36 -0600, siegfried wrote: > I apologize, I forgot to mention something very important: I am using > cygwin's cron on

Re: golf

Chad Perrin wrote: > On Fri, Apr 21, 2006 at 12:48:51PM -0700, John W. Krahn wrote: >>print/.*/g,$"while<> > > Woah, that's pretty short. You can make it even shorter: print/.*/g,$"for<> > Thanks. Now I just need to go read a bit > and figure out how exactly it works. > > . . . unless you wan

Re: [regexp] Multi-level pattern matching

On Fri, Apr 21, 2006 at 02:54:29PM -0700, Adam W wrote: > > The following does about 95% of the job: > > if (/<(.*?)>/g && !/<\!/g) { # if it's an HTML and not a > #s/^(.*?)"(.*?)"/\L$1\E"$2"/g; > } Y'know, I was playing around with thi

Re: golf

On Fri, Apr 21, 2006 at 04:03:49PM -0700, John W. Krahn wrote: > Chad Perrin wrote: > > On Fri, Apr 21, 2006 at 12:48:51PM -0700, John W. Krahn wrote: > >>print/.*/g,$"while<> > > > > Woah, that's pretty short. > > You can make it even shorter: > > print/.*/g,$"for<> True, that. I'm used to us

Re: [regexp] Multi-level pattern matching

Chad Perrin wrote: Y'know, I was playing around with this to see if I could come up with a reasonably elegant solution, and I noticed a problem: Your code doesn't seem to actually work. Am I missing something? I went back to check, and it seems to only be working in very specific cases. For