Re: Algorithm Help Needed
On Tuesday 13 September 2005 09:55 am, Jeff 'japhy' Pinyan wrote: On Sep 13, Bob Showalter said: I need help with an algorithm. I'm writing a program that sends a repeated pattern of requests to a service. Each request has a weight that controls the relative frequency with which I need to send that particular request. foo = 1 bar = 1 qux = 6 foo qux qux qux bar qux qux qux Now I have only intervals of 0 or 1 between successive qux, instead of an interval of 2 as in the previous case. As an extreme example, if I had a dozen requests with a weight of 1 and a final request with a weight of 12, I would starve the highly-weighted request until the first 12 had been sent. The extreme cases are the easy ones, though. What I'd like to see are cases like: foo = 1 bar = 2 qux = 3 baz = 4 zip = 5 Once I know what the algorithm's outcome should be for something like that, I think I can develop it. -- Jeff japhy Pinyan% How can we ever be the sold short or RPI Acacia Brother #734% the cheated, we who for every service http://www.perlmonks.org/ % have long ago been overpaid? http://princeton.pm.org/ %-- Meister Eckhart yes, how would you want to split zip which is odd.. Also, with your extreme case you said you would do all the singles first and do the 12 weighted one last. that goes against your primary objective which is to distribute the service request evenly . In that case I would expect the one with weight of 12 to be distributed among the single weighted request.. if foon=1 and bar = 12 then foon bar foon bar etc... -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: can any body tell me how to remove quotes from a name.
if the 'mayank' is in a text file, then cat file | sed s/\'//g newfile this should do it I think. On Wednesday 31 August 2005 03:42 am, [EMAIL PROTECTED] wrote: Hi all Could any body tell me how to get mayank from 'mayank' sp. by map or grep command (means I just want to remove the single quotes. tht's it) thankx n with regards Mayank Ahuja Assistant System Engineer Tata Consultancy Services Limited Ph:- 044-5816 Cell:- 9283199460 Mailto: [EMAIL PROTECTED] Website: http://www.tcs.com Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you -- Eric Walker EDA/CAD Engineer Work: 208-368-2573 -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Please Help!!! Newbie question
On Wednesday 31 August 2005 09:12 am, Perl wrote: I am new to perl so I need some help from the list with this script. It takes a value from command line and then returns afters processing. For example, If value is c:\projects\test 2005.txt the script will returns it as test (actually omitts any space in the directory or file name) while I want the full name of the file regardless of any space in the directory or filename. how can I get the value test 2005.txt? #!/usr/bin/perl # file: basename.pl use strict; use File::Basename; my $path = $ARGV[0]; my $base = basename($path); my $dir = dirname($path); print STDOUT $base; any help will be greatly appreciated. Thanks in advance. print $path; I think that will get it... -- Eric Walker EDA/CAD Engineer Work: 208-368-2573 -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Escaping with tr
On Tuesday 30 August 2005 04:16 pm, Bernard van de Koppel wrote: bla bla;bla bla;bla bla cat test.file | sed 's/\//g' editedfile -- Eric Walker EDA/CAD Engineer Work: 208-368-2573 -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Grep uniqueness issue
can you use the uniq command? On Friday 29 July 2005 09:03 am, [EMAIL PROTECTED] wrote: Hey Guys I am having an odd problem using grep to ensure an array only contains distinct entries. I have a list similar to the following in a file (short example of a much longer list) support01-FastEthernet1/0 support01-RH jnormandin-p370-1691-SH-Cpu-2 jnormandin-p370-1691-SH These entries may or may not appear multiple times within that list. I am trying to create an ARRAY containing each of these entries only once (a distinct list). I am using a grep statement: push @pingErrorsName, $element if (! grep (/\b$element\b/, @pingErrorsName)); * Where $element contains one of the above names in the list and @pingErrorsName is the distinct list of elements. What I am finding is that the array will contain all of the correct entries except: jnormandin-p370-1691-SH. It appears as though the grep is matching jnormandin-p370-1691-SH to the jnormandin-p370-1691-SH-Cpu-2 string (as it is a substring of the second one). Now I am using word boudnary anchors (\b) in the grep so I am confused as to why this is not working. Does anyone have any ideas as to why this is occuring and how I can prevent it? -- Eric Walker EDA/CAD Engineer Work: 208-368-2573 -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: blessing a class
On Tuesday 07 June 2005 12:44 pm, radhika wrote: I am learning about perl modules and am having a little trouble understanding the blessing of an object. For instance: bless($self, $type); What does this do? Thanks, rs. -- It's all a matter of perspective. You can choose your view by choosing where to stand. Larry Wall --- I am a newbie myself but as far as I know blessing actually registers the current object with perl. This allows for inheritance and instances of the object to be created. Also for methods to act on this newly registered(blessed) object. PerlNewbie -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: remove duplicate lines
Can't you run uniq from the command prompt to get rid of the duplicate lines? perlnewbie.. On Friday 27 May 2005 09:07 am, John Doe wrote: Hello As an addition to my last post: Am Freitag, 27. Mai 2005 13.56 schrieb Jack Daniels (Butch): Wow, I'm really confused. I'm trying to remove duplicate lines from a marc21 text file. I have spent countless hours searching for scripts etc. What I find frustrating while trying to learn Perl, is that most solutions assume you know what to do. I think this is nothing special; if somebody has coded a _solution_, he (hopefully) knows what he has done. To learn perl, you have to spend hours and hours studying books/docs/examples, thinking, trying etc. For example, someone gives the code to find and replace, and that's it. Generally, as preciser a question is formulated, as bigger the chance that the answer is precise too. If you have the luck to get an answer from a guru (I'm not a guru), he will point you to good resources for learning. In other words, if the complete script was there, I think I could learn much faster. On the other side, it can hinder from learning, since one can simply _run_ the script without even trying to understand it. I have no idea of how to put the code into a script. If you have searched for scripts, and found at least one, you already have an example how to put code into a script. [...] [snip example data] kind regards, joe -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: remove duplicate lines
On Friday 27 May 2005 01:22 pm, John Doe wrote: Am Freitag, 27. Mai 2005 17.15 schrieb Eric Walker: Can't you run uniq from the command prompt to get rid of the duplicate lines? perlnewbie.. [...] Yes I can, $ cat marc21textfile | uniq outputfile but the OP explicitly wanted a perl script and states For now, I just want to remove adjacent duplicate fields. from which I concluded that he wants to elaborate the script further, and as a perlnewbie on a perl list I try to answer perl questions. thanks, joe Ok, the perlnewbie tag is for me, not you. Seems like you got upset. sorry for the misunderstanding.. perlnewbie -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Trouble with compound regular expression matching
On Monday 06 December 2004 05:05 pm, Jeffrey Paul Burger wrote:
I tried everything I could think of to get this to work before pleading for
help!
I need to check if a file is either a TIFF or JPEG graphics file.
(Case-insensitive variations of qualifying suffixes would be .tif, .tiff,
.jpg and .jpeg.) So far I have three difference versions of what seem to be
a valid line of code to test a single pattern. ($file_name holds the name
of the file. Also, for logic reasons, I'm testing that it's NOT one of
these types):
if ($file_name !~ /tif$/i) {}
if ($file_name !~ m/tif\b/i) {}
if ($file_name !~ m/.*.tif/i) {}
But I can't for the life of me figure out how to structure a working
version of a more complex variation on any of the these that test all four
cases (or even a second one, for that matter). From my reading, I would
expect the following to work, but it doesn't:
if ($file_name !~ /tif$/i | /jpg$/i) {}
Any help would be greatly appreciated.
Thanks!
Jeffrey Paul Burger
2675 W. Hwy. 89A - PMB 455
Sedona, AZ 86336
928-203-0170
There are only two ways to live your life.
One is as though nothing is a miracle.
The other is as if everything is.
--Albert Einstein
I am no professional but try this one.
if ($file_name !~ /(tif$|jpg$)/i {}
cross your fingers...
perl newbie
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Re: converting the elements of a hash to uppercase
Can't you do the upper case thing when you first create it?
On Friday 12 November 2004 03:07 pm, Randy W. Sims wrote:
Octavian Rasnita wrote:
Hi all,
Please tell me how to convert the elements of a hash to uppercase, if I
can access that hash only by reference.
For example, I have something like:
my $ref = { 'a' = 'aaa', 'b' = 'bbb', 'c' = 'ccc' };
And I want to make 'a' to be 'A', 'b' to be 'B' and so on, but the values
of the hash need to remain the same.
I have tried using map() but without success.
You can't modify the key; you can only create a new one and remove the
old one:
#!/usr/bin/perl;
use strict;
use warnings;
my $ref = { 'a' = 'aaa', 'b' = 'bbb', 'c' = 'ccc' };
while ( my($k,$v) = each %$ref ) {
$ref-{uc($k)} = delete( $ref-{$k} );
}
use Data::Dumper;
print Dumper( $ref );
__END__
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Re: Having trouble using the Shell within Perl script.
Does the output from the scripts go into a file or does the output print to the screen(standard out)? If it goes to a file then you need to open the file and read the info. If it goes to standard out you can do something like this to get the ouput. @info=`/home/my/directory/scriptname` (the backtick not the single quote) I think this will take standard output from that script and put each line of code into the array @info. Hope this helps Newbie... On Monday 26 July 2004 12:38 pm, jason corbett wrote: Hello. I would like to use the shell to run SQL scripts or PL/SQL scripts written by co-workers. These scripts are useful and I don't need to do re-work so I am trying to use them in my perl script where i can retrieve the data that results from running them into a $scalar, @array, or %hash. I cannot seem to GET the values/or variables to be stored into a perl variable that I created. Can anyone help me do this? I actually have it where I call a sub routine that goes out and runs the script, but I am not able to get the data when I return from the shell. Thanks, JC -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: find out who was online at a given time
On Tuesday 20 July 2004 10:34 am, [EMAIL PROTECTED] wrote: Ok, this may or may not be a tricky one I will try and be succinct in my statement. I have a database (mysql 4.0) with radius log entries for each day, we receive emails about Acceptable Use Abuses and must figure out exactly who was online with a certain IP address when the abuse occurred. As you will see below there are multiple starts and stops for any given IP address so here is the scenario: Problem: Spam Abuse IP of offender: 66.50.xxX.245 Date of offense: 2004-07-05 Time of offense: 16:15 Now if I query the database based on date and ip address, I get the following: Id Date Time Record TypeFull Name IP Address == = 349 2004-07-0511:21:08 Start [EMAIL PROTECTED] 66.50.xxX.245 345 2004-07-0511:21:09 Start [EMAIL PROTECTED] 66.50.xxX.245 413 2004-07-0511:22:32 Stop [EMAIL PROTECTED] 66.50.xxX.245 118984 2004-07-0517:22:26 Start [EMAIL PROTECTED] 66.50.xxX.245 149049 2004-07-0518:36:19 Stop [EMAIL PROTECTED] 66.50.xxX.245 90344 2004-07-0516:09:40 Start [EMAIL PROTECTED] 66.50.xxX.245 90380 2004-07-0516:09:40 Start [EMAIL PROTECTED] 66.50.xxX.245 97630 2004-07-0516:28:20 Stop [EMAIL PROTECTED] 66.50.xxX.245 97671 2004-07-0516:28:20 Stop [EMAIL PROTECTED] 66.50.xxX.245 97598 2004-07-0516:28:20 Stop [EMAIL PROTECTED] 66.50.xxX.245 149142 2004-07-0518:36:33 Start [EMAIL PROTECTED] 66.50.xxX.245 310758 2004-07-0518:36:33 Start [EMAIL PROTECTED] 66.50.xxX.245 117382 2004-07-0517:18:34 Start [EMAIL PROTECTED] 66.50.xxX.245 117437 2004-07-0517:18:34 Start [EMAIL PROTECTED] 66.50.xxX.245 117351 2004-07-0517:18:34 Start [EMAIL PROTECTED] 66.50.xxX.245 118181 2004-07-0517:20:34 Stop [EMAIL PROTECTED] 66.50.xxX.245 807 2004-07-0511:27:55 Start [EMAIL PROTECTED] 66.50.xxX.245 805 2004-07-0511:27:56 Start [EMAIL PROTECTED] 66.50.xxX.245 158170 2004-07-0518:56:54 Start [EMAIL PROTECTED] 66.50.xxX.245 161543 2004-07-0519:04:02 Stop [EMAIL PROTECTED] 66.50.xxX.245 110780 2004-07-0517:01:56 Start [EMAIL PROTECTED] 66.50.xxX.245 116436 2004-07-0517:16:09 Stop [EMAIL PROTECTED] 66.50.xxX.245 now of course I changed the usernames and modified the IP for this mailing but that doesn't matter, now, the time field in the Database IS a time data type. What I need to be able to do is find the start before the offense time, and the stop after the offense time so I know that the person with the start and the stop is the one that committed the abuse. I haven't actually put code to bits yet, because I am not exactly sure how to go about creating this logic code. I don't think I can just say if $timefield time of offense and $timefield time of offense; return some stuff. So any help on how to start with this would be greatly appreciated. Chris Hood Investigator Verizon Global Security Operations Center Email: mailto:[EMAIL PROTECTED] [EMAIL PROTECTED] Desk: 972.399.5900 Verizon Proprietary NOTICE - This message and any attached files may contain information that is confidential and/or subject of legal privilege intended only for the use by the intended recipient. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, be advised that you have received this message in error and that any dissemination, copying or use of this message or attachment is strictly forbidden, as is the disclosure of the information therein. If you have received this message in error please notify the sender immediately and delete the message. Not sure as I am a newbie also. Can you sort by name, then sort that result by day, then sort that result by time?. This I think should give the offense notifications for a particular user..??? -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Question of memory management in Perl
off the top of my head I would suggest you slice off the slice off the pieces
that you have used already when pulling data from the original array. That
way the array gets smaller as you finish modifiying its info and transferring
it somewhere else.
BassFool
On Monday 24 May 2004 02:57 pm, Hari Krishnaan wrote:
Hi all,
I have question with respect to memory utilization using perl. I am reading
a huge file close to 786432 lines of hex values am storing in an array. I
do a data reformatting using the data in these array in the sequence of
process generate a number of arrays eventually write into a file at the
end of the subroutine. The problem I get is in the middle of subroutine
execution I get Out of memory indication I have used close to 2 Gigs of
memory. So inorder to avoid this Out of memory issue what I did was, after
I send the array elements to a different array, I initialize the original
array with null. For eg: this is what I do with one of the array,
for ($init_cnt=0;$init_cnt=$#out_array_bin;$init_cnt++) {
$out_array_bin[$init_cnt] = ;
}
I followd the same approach with other arrays in my subroutine.
I thought this would solve my Out of memory problem but it did not.
Can some one tell me what could be an alternative solution for this problem
or kindly suggest me if sometning I should need to correct in my existing
solution.
Thanks for the help in advance,
Hari
-
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modules and _DATA_
I have some code I want to add a package in the same file. I already
have some _DATA_ in the file. Currently, the code is not seeing the
_DATA_. How can I add a package in the same file then.
Thanks
perlknucklehead
example:
while DATA{
do something
}
_DATA_
this
is my
data
section
Re: modules and _DATA_
On Fri, 2004-01-23 at 14:34, James Edward Gray II wrote:
On Jan 23, 2004, at 3:27 PM, Eric Walker wrote:
I have some code I want to add a package in the same file. I already
have some _DATA_ in the file. Currently, the code is not seeing the
_DATA_. How can I add a package in the same file then.
I believe your DATA tag at the end is the problem. It's supposed to be
__DATA__. That's underscore underscore D A T A underscore underscore.
Hope that helps.
James
example:
while DATA{
do something
}
_DATA_
this
is my
data
section
sorry I was typing to fast, it is __DATA__ This program was working before but
when I tried to add a package to it, I did some test and its not reading
the DATA anymore. Is there a certain order?
Re: modules and _DATA_
On Fri, 2004-01-23 at 14:43, Randy W. Sims wrote:
On 1/23/2004 4:36 PM, Eric Walker wrote:
when I tried to add a package to it, I did some test and its not reading
the DATA anymore. Is there a certain order?
__DATA__ must be in package main;
#!perl
use strict;
use warnings;
while (DATA) {
print;
}
package Test;
sub a {}
1;
package main; # DATA must be in main
__DATA__
this
is my
data
section
worked like a charm thanks, now its working but correctly time to get my handy
dandy
print statement out...
Thanks..
Re: modules and _DATA_
On Fri, 2004-01-23 at 14:46, drieux wrote:
On Jan 23, 2004, at 1:36 PM, Eric Walker wrote:
[..]
when I tried to add a package to it, I did some test and its not
reading
the DATA anymore. Is there a certain order?
[..]
How did you put the package in?
ciao
drieux
---
#!/usr/bin/perl -w
use strict;
my $foo = new Foo::Bar;
while(DATA){
$foo-showMe($_);
}
BEGIN {
package Foo::Bar;
use 5.006;
use strict;
use warnings;
our $VERSION = '0.01';
#-
# Our Stock Constructor
# note: http://www.perlmonks.org/index.pl?node_id=52089
sub new
{
my $class = shift;
my $self = {};
bless $self, $class;
} # end of our simple new
#-
# so that AUTOLOAD finds one here
sub DESTROY {}
#
#
sub showMe
{
my ($me,$line) = @_;
print $line;
} # end of showMe
1; # so that the 'use Foo::Bar'
# will know we are happy
} # end begin
__DATA__
This line
and then the world.
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while DATA{
do something;}
package ONE
package stuff;
1;
package main
__DATA__
data stufff
is this sound?
Hey guys/girls,
I want to make a list of structures from a file. Then once I get the
structures check to see if a particular value matches any in the list of
structurs that I have created. If there is a match then return the
pointer to the matching structure. Check the code below and let me know
if I am on the write track. Assuming I am creating object and calling
the method correctly.
sub new {
my ($class,$rulenumber,$value,$type,$value,$comment) = @_;
$class = $_[0];
my $r_section = { #creates unique object
Rulenumber = $rulenumber,
Type = [a,b,c],
Value = $value,
Comment= $comment,
};
return bless ($r_section,$class);#returns object
}
sub find {
my ($self,$r_Obj,$rule) = @_;
#$r_Obj is a pointer to an array of pointers that were created from
routine above
#$rule is the rule I am looking for.
foreach $item ($r_Obj){
if($rule eq $item-{'Rulenumber'}){
return($item); #This will return a matching rulenumber
}#endif
}#endfor
}#endsub
Thanks
Perlknucklehead
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omg, spelling
please disregard the spelling errors... perlknucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
error.
Does anyone know what this means...
code..
for ($i = 0;$i = $size; $i+=$temp){
$type= split(::,shift (@hold));
}
Warning:
Use of implicit split to @_ is deprecated at .//test.pl line 21
help, thanks
perlknucklehead
RE: error.
On Wed, 2004-01-14 at 16:17, Tim Johnson wrote:
As far as I can see...
The split() function returns a list, not a scalar. When you tried to assign it to
a scalar, it tried to assign the result to @_ and then assign the number of items in
@_ to $type. Maybe I'm wrong, someone else will probably correct me i so. In any
case, I'm almost 100% sure that isn't what you want.
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 14, 2004 3:03 PM
To: perlgroup
Subject: error.
Does anyone know what this means...
code..
for ($i = 0;$i = $size; $i+=$temp){
$type= split(::,shift (@hold));
}
Warning:
Use of implicit split to @_ is deprecated at .//test.pl line 21
help, thanks
perlknucklehead
ok thanks...
RE: error.
On Wed, 2004-01-14 at 16:17, Tim Johnson wrote:
As far as I can see...
The split() function returns a list, not a scalar. When you tried to assign it to
a scalar, it tried to assign the result to @_ and then assign the number of items in
@_ to $type. Maybe I'm wrong, someone else will probably correct me i so. In any
case, I'm almost 100% sure that isn't what you want.
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 14, 2004 3:03 PM
To: perlgroup
Subject: error.
Does anyone know what this means...
code..
for ($i = 0;$i = $size; $i+=$temp){
$type= split(::,shift (@hold));
}
Warning:
Use of implicit split to @_ is deprecated at .//test.pl line 21
help, thanks
perlknucklehead
GIN
OK, some how my $_ variable is out of sync with my operator. if I print out $_ I get line a of my file and if I do a my $test = GIN, and print out $test I get a different line that is more than the next line away. example. I am the best you are the best we are the best they are the best. print $_ I am the best $test = GIN; print $test they are the best any suggestion on how to resync it? perlknucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
RE: GIN
Yea, I did do the $test = GIN;
Is there anyway to sync them back up instead of rewriting my code?
On Wed, 2003-12-31 at 12:51, Tim Johnson wrote:
Well, this sounds like a basic coding mistake, but you haven't actually shown us
any of your code. My best bit of advice would be to 1) use strict, 2) use warnings,
and 3) check if you're doing something along these lines:
while(FILEHANDLE){
print $_;
$test = FILEHANDLE;
print $test;
}
which would pull down an extra line while you're assigning the variable and cause
it to seem to skip one.
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Wed 12/31/2003 9:57 AM
To: perlgroup
Cc:
Subject: GIN
OK, some how my $_ variable is out of sync with my operator.
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Re: GIN
On Wed, 2003-12-31 at 13:27, James Edward Gray II wrote:
On Dec 31, 2003, at 11:57 AM, Eric Walker wrote:
OK, some how my $_ variable is out of sync with my operator.
if I print out $_ I get line a of my file and if I do a my $test =
GIN, and print out $test I get a different line that is more than the
next line away. example.
I am the best
you are the best
we are the best
they are the best.
print $_ I am the best
$test = GIN;
print $test they are the best
any suggestion on how to resync it?
I think you are pretty confused about what and $_ mean.
is the input operator, it reads one input record (often a line) each
time it is used. You're examples show it with a file handle inside of
it, which is where the record/line will be read from. Example:
FILE; # read first line of file, and do nothing with it
my $line = FILE; # read next line of file and store it in $line
$_ is Perl's default variable. That means that many built-ins and some
operators work with the contents of $_ unless they are told to do
otherwise. Example:
print; # prints to value of $_
print Bark!\n if m/\bDog\b/; # prints Bark! if $_ contains the word
Dog
foreach (@name) { # loops over @names, putting one at a time in
$_
# ... use $_ here to access current name
}
chomp; # removes input record separator from
$_
Now where I think you are getting confused is the typical Perl idiom:
while (FILE) {
}
That's actually a shorthand way to write:
while ( defined( $_ = FILE ) ) {
}
Notice that the record/line read from FILE there is assigned to $_,
making it convenient to work with the current line.
However, outside this special case $_ and are not related.
Something like:
FILE; # does NOT assign to $_, line is discarded
my $line = FILE; # assigns to $line, $_ is untouched
Now if you want to put something in $_, you can of course:
$_ = FILE;# assigns next record/line to $_
Hope that clears things up for you.
James
Ok thanks for that info. Now is there a way to move back up the file
and get previous lines or do you have to store them in a variable and
use them later.
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Re: GIN
On Wed, 2003-12-31 at 14:35, James Edward Gray II wrote: On Dec 31, 2003, at 3:05 PM, Eric Walker wrote: Ok thanks for that info. Now is there a way to move back up the file and get previous lines or do you have to store them in a variable and use them later. Well, you got lot's of information about this yesterday, I believe. You can store them in variables as myself and others have shown. You can slurp the entire file into an array an work with indexed lines, if file sizes are reasonable. You can also use the Tie::File module, to treat the file itself as an array. If you're still working on the same issues though, you'll get a lot more out of us by posting something to work with: your code, data, and desired results, for example. James Thanks all for your help and suggestions. Seems I have been going about this the wrong way. Not thinking outside of the box. Thanks! perl knucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
$_
I am going through a file and when I enter a certain routine, I am entering a while loop with the IN construct. Is there a way to back the counter up or back up one line before I go into the while loop? a b c d Instead of seeing b when I enter the while loop, adjust some option and see the a. perlknucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: $_
The lines will always be defined but I need to process that previous
line. I am still kinda in the closet on what you mean.
..
On Tue, 2003-12-30 at 09:42, James Edward Gray II wrote:
On Dec 30, 2003, at 10:36 AM, Eric Walker wrote:
I am going through a file and when I enter a certain routine, I am
entering a while loop with the IN construct. Is there a way to back
the counter up or back up one line before I go into the while loop?
a
b
c
d
Instead of seeing b when I enter the while loop, adjust some option and
see the a.
How about adding:
my $last;
while (IN) {
# use $last here, but watch for undef on the first iteration, for
example:
do_something( $last ) if defined $last;
$last = $_;
}
Hope that helps.
James
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Re: $_
Once I get into the while loop the previous line I had is lost. As this
while is underneath another while that I am using in another routine.
thanks
On Tue, 2003-12-30 at 09:42, James Edward Gray II wrote:
On Dec 30, 2003, at 10:36 AM, Eric Walker wrote:
I am going through a file and when I enter a certain routine, I am
entering a while loop with the IN construct. Is there a way to back
the counter up or back up one line before I go into the while loop?
a
b
c
d
Instead of seeing b when I enter the while loop, adjust some option and
see the a.
How about adding:
my $last;
while (IN) {
# use $last here, but watch for undef on the first iteration, for
example:
do_something( $last ) if defined $last;
$last = $_;
}
Hope that helps.
James
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RE: $_
ok with that can I still continue through the loop and process the next
line?
will I not loose the second line now?
On Tue, 2003-12-30 at 09:49, Dan Muey wrote:
The lines will always be defined but I need to process that
previous line. I am still kinda in the closet on what you mean.
He means the variable $last he used. I've tried to do an exqample that may help
clear it up for you:
my $prev;
for(qw(a b c d e f g)) {
print Previous item was $prev\n if defined $prev;
print Current item is $_\n;
$prev = $_;
}
HTH
DMuey
..
On Tue, 2003-12-30 at 09:42, James Edward Gray II wrote:
On Dec 30, 2003, at 10:36 AM, Eric Walker wrote:
I am going through a file and when I enter a certain
routine, I am
entering a while loop with the IN construct. Is
there a way to back
the counter up or back up one line before I go into the
while loop?
a
b
c
d
Instead of seeing b when I enter the while loop, adjust
some option and
see the a.
How about adding:
my $last;
while (IN) {
# use $last here, but watch for undef on the first
iteration, for
example:
do_something( $last ) if defined $last;
$last = $_;
}
Hope that helps.
James
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Re: $_
No size is not an issue. I am writing a compare routine and the file has different sections that all need to be split up differently depending on the section to parse out the key value pairs so I can compare. Thanks for the suggestions. On Tue, 2003-12-30 at 09:53, James Edward Gray II wrote: On Dec 30, 2003, at 10:45 AM, Eric Walker wrote: The lines will always be defined but I need to process that previous line. I am still kinda in the closet on what you mean. my $current = $_; # process $current here... Other choices: If file size isn't an issue, just slurp the whole think into an array and use indexing. If it is, use Tie::File. Good luck. James -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
RE: $_
On Tue, 2003-12-30 at 10:04, Dan Muey wrote:
ok with that can I still continue through the loop and
process the next line?
You can use $_ :
for(qw(1 2 3)) {
print Processing files - iteration number $_\n;
my @files = qw(foo.txt bar.html);
for(@files) {
open(FH,$_) or die Can not open $_ : $!;
my $prev;
while(FH) {
print Previous item was $prev\n if defined $prev;
print Current item is $_\n;
$prev = $_;
}
close(FH);
}
}
What happens when you do something like that?
will I not loose the second line now?
On Tue, 2003-12-30 at 09:49, Dan Muey wrote:
The lines will always be defined but I need to process that
previous line. I am still kinda in the closet on what you mean.
He means the variable $last he used. I've tried to do an
exqample that may help clear it up for you:
my $prev;
for(qw(a b c d e f g)) {
print Previous item was $prev\n if defined $prev;
print Current item is $_\n;
$prev = $_;
}
HTH
DMuey
..
On Tue, 2003-12-30 at 09:42, James Edward Gray II wrote:
On Dec 30, 2003, at 10:36 AM, Eric Walker wrote:
I am going through a file and when I enter a certain
routine, I am
entering a while loop with the IN construct. Is
there a way to back
the counter up or back up one line before I go into the
while loop?
a
b
c
d
Instead of seeing b when I enter the while loop, adjust
some option and
see the a.
How about adding:
my $last;
while (IN) {
# use $last here, but watch for undef on the first
iteration, for
example:
do_something( $last ) if defined $last;
$last = $_;
}
Hope that helps.
James
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Sorry for the Top post its my default reply setting. Np. Ok I kinda of see what
you guys/girls are talking about. Let me try something and if it
doesn't work I will post up some code.
Thanks
Knucklehead
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Re: $_
On Tue, 2003-12-30 at 16:39, Rob Dixon wrote: Eric Walker wrote: I am going through a file and when I enter a certain routine, I am entering a while loop with the IN construct. Is there a way to back the counter up or back up one line before I go into the while loop? a b c d Instead of seeing b when I enter the while loop, adjust some option and see the a. Forgive me, but what a disappointing thread this has turned out to be! I was drawn by the subject line, which turned out to be irrelevant, and met a series of speculative answers. My fault really, for letting my hopes be raised. Rob -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response sorry I didn't really phrase the question properly and didn't provide any example code.I will do better next time. Thanks Knucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: foreach
Thanks I was able to use a for loop and just do a $cnt + N to access any locations that I needed, that I have not iterated on. Thanks...all for your help perlknucklehead On Fri, 2003-12-19 at 07:24, James Edward Gray II wrote: On Dec 19, 2003, at 7:59 AM, Rob Dixon wrote: That's fair enough, as long as you have a consistent convention. I use for (EXPRESSION; EXPRESSION; EXPRESSION) and foreach (LIST) unless the list has only one element, when I use for (EXPRESSION) to alias $_ with the expression for the extent of the block. Just to throw another log on the fire: I do my foreach (LIST) as Rob does above, unless I'm using my own variable and then because I like the way it reads I change it to: for my $var (LIST) Ah, programmers and their little rules. :D James -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
debugger
Hello all, When using the perl debugger, is there a way to load in the breakpoints and watch variables that I want from a file. I am using it now and as I am debugging I am finding problems but when I start the program over I have to re-enter all my breakpoints and watch variables again. Can these be listed in a file and then read by the debugger to ease the amount of things to enter? Thanks Perlknucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
NEVERMIND I FOUND THE ANSWER
Never mind, I found that instead of hitting q twice , just hit it once and the r for restart and I still keep all my settings.. Thanks... perlknucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: Align Text
I have use the FORMAT function in perl. Its pretty nice.
perldoc -f format.
Hope that helps
perlknucklehead
On Fri, 2003-12-19 at 14:20, Rob Dixon wrote:
Bill Jastram wrote:
We're getting closer. But lets say the first name of the first
field in the first row is 'Bill'. And the first name of the
first field in the second row is 'Lanette'. This command will
not compensate for the difference in the length of the two
first names. So, the alignment of the second fields in each
row will not be correct. And so on ...
Does this help you understand where I'm headed?
Hi Bill.
What James wrote still applies I think. See the code below,
which does what I think you want?
HTH,
Rob
foreach ('Bill Jastram', 'Lanette Smith') {
printf %-20s %-20s\n, split;
}
**OUTPUT
Bill Jastram
Lanette Smith
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foreach
Hello all While traversing a loop across and array, how can I access array positions further down the array, like say if I am on a loop looking at position 23, how can I check the value of say position 24 or 32 while my loop counter is on position 23. Thanks perl knucklehead -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
Re: foreach
I got it so I need a counter which sends me to a for loop instead of a foreach. Thanks.. perlknucklehead On Thu, 2003-12-18 at 17:07, Paul Johnson wrote: On Thu, Dec 18, 2003 at 04:57:26PM -0700, Eric Walker wrote: Hello all While traversing a loop across and array, how can I access array positions further down the array, like say if I am on a loop looking at position 23, how can I check the value of say position 24 or 32 while my loop counter is on position 23. Hmmm? Add 1 or 9 to your loop counter? Or have you not actually got a loop counter? If that is the case the easiest solution is probably to get one. Or have I completely misunderstood? Showing the code is usually more productive than simply describing the problem. -- Paul Johnson - [EMAIL PROTECTED] http://www.pjcj.net -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
nested Paren's
Hey all, I have a file with some data that has like nested parens.. example yes( hello goodbye ( (one 2) (two 3) (three 4) ) (( mon 1) (tues 2) (wed 3) ) ((jan 1) (feb 2) (march 3) ) ) I need help in trying to break this up and make key value pairs out of the data example: KEYVALUE one 2 two 3 three4 mon 1 tues 2 wed 3 jan 1 feb 2 march 3 I currently to a while loop in the file and join each line and count the opening and closing parens, this gets the entire set of lines in one array location for me. Now I get confused and need help to parse it into key value pairs. Thanks perl knucklehead )
Re: nested Paren's
Well, the problem is that this is just one section of a file the other
sections actualy have different format. When I get to this section I key
on the section name to know how to process it and will need to key on
the last paren know that this section is done and to try and key on what
the next section is and how it is processed. Not all of the data in
this section is of the form mon 1 every know and then you get something
like list( one two). The data i am making up as I didn't think it
was important. I figured the form is what was needed. Once I get the
key value pairs it doesn't matter because I am going to read another
file like this and compare the data to make sure nothing has changed
between the two files. I like the regx thing tho, it gives me some
ideas.. I will see if I can make it work with that...
perl knucklehead
On Thu, 2003-12-11 at 11:28, drieux wrote:
On Dec 11, 2003, at 9:30 AM, Eric Walker wrote:
[..]
yes( hello goodbye
( (one 2) (two 3) (three 4)
)
(( mon 1) (tues 2) (wed 3)
)
((jan 1) (feb 2) (march 3)
)
)
[..]
The question of course is whether that 'ordering'
is important, or can you just use a hash?
IF you do not really need to know about the
paren count then don't count it. IF you
know that your generalized date is going to
be of the form
(word num)
then your word_num regEx would look like
my $word_num = qr/\( # our opening paren
(\w+)\s+(\d+)
\)/ix; # our closing paren
I use the 'x' option to lay it out pretty like that.
then the rest is a walker
while ( INFO1 ) {
chomp;
next if (/^\s*$/); # no need empty lines
s/^\s+//; # kill leaing lines
my $line = $_; # now we have a line to play with
while ( $line =~ /$word_num(.*)/)
{
$hash{$1} = $2; # our $word_num pattern fetched these
$line = $3; # for everything else there is (.*)
}
}
while (my ($k, $v) = each %hash)
{
print $k - $v\n;
}
ciao
drieux
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Re: nested Paren's
Ok,, back to some laymen terms hehe... The file is read by an application and what I am doing is this. The application use to read this file that was created by hand to set some internal settings. I a wrote a program to pull the same info from a database. The auto generated file will ultimately be use for the program to read and set these internal values. I am trying to dump the current values from the program and do a compare between the file I auto created and whats in the program now. this is why I am trying to suck in all the values so I can do a compare and make sure the auto generated file does the same things as the current file that was made by hand. So the keys Idea is a no go. I am glad at least the data was good enough for us to kick around. The way they are writting is the only way they can be do to the application that reads them. How do you determine if an application has a portable library? I know nothing of that but sounds like something neat and witty.. If I could do that and use a perl module that would be nice. perlknucklehead I know nothing of xml I am sorry to say. you kinda dove off of the big diving board and I am still back putting on my floaters. hehehe... On Thu, 2003-12-11 at 12:39, drieux wrote: On Dec 11, 2003, at 10:52 AM, Eric Walker wrote: Well, the problem is that this is just one section of a file the other sections actualy have different format. [..] every know and then you get something like list( one two). [..] The data i am making up as I didn't think it was important. I figured the form is what was needed. [..] Once I get the key value pairs it doesn't matter because I am going to read another file like this and compare the data to make sure nothing has changed between the two files. [..] p0: the 'data' that you made up, was good enough to get us some direction to start looking at solutions. p1: You might ultimately want to look at a re-write of how those 'files' are being created, so that the sub-sequent post parsing is simpler. IF that is not an option - then you might want to see if the application that created the format has a library that can be 'ported' and hence build out a perl module of your own that would share it's parser structure. p1.1 - either go with say an xml-ish model hence use the LibXml module for parsing p1.2 - assume that the applications library is lib_fung_parser.so - then you want to get your hands on the header files and use h2xs to generate your Fung::Parser module p2: The problem of multiple section readings from a file should lead you towards a simpler process where you have keys in the file that indicate which 'parser' to be using at which point you might want to look at a 'dispatcher'... where each 'function' knows how\ to return stuff related to what it knows how to read, and specifically how it's 'end of section' will tell it to stop parsing and go back. ciao drieux --- -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/ http://learn.perl.org/first-response
empty strings vs nulls
How can I test for empty strings and nulls on a particular value. When I get an empty string or a null value I need to do something. Thanks in Advance. BassFool
Ticked Off..
Hey all I know I have been told but I can't seem to access this hash.
Can anyone look and see why I can't print out any values. The print
item statement works and prints out the first level of the hash.
I send in a pointer to $data and $rule.
sub COMMENTSYNC{
my($rule,$data) = @_;
my($crule,$temp,@map,$count);
foreach my $item (keys %{$$data}){
print %{$$data{$item}{'rule_desc'}} . \n;
#print $item . \n;
}
Thanks
RE: Ticked Off..
OK hash should look like this.
M -anonhash
a - value;
b- value;
c- value;
does that help?
On Fri, 2003-11-21 at 14:04, Bob Showalter wrote:
Eric Walker wrote:
Hey all I know I have been told but I can't seem to access this hash.
Can anyone look and see why I can't print out any values. The print
item statement works and prints out the first level of the hash.
I send in a pointer to $data and $rule.
sub COMMENTSYNC{
my($rule,$data) = @_;
my($crule,$temp,@map,$count);
foreach my $item (keys %{$$data}){
Here you're using $data as a reference to a scalar (which is in turn a
reference to a hash). Is that really what $data is?
print %{$$data{$item}{'rule_desc'}} . \n;
Here you're using $data as a reference to a hash. To be consistent with the
usage above, you would write that as $$data-{$item}. Also, why are you
trying to print a hash? That's odd.
#print $item . \n; }
Show us your data, and show us what you expect to be printed. I can't figure
out what's going on. But then again, I'm not real smart.
RE: Ticked Off..
I got it thanks. I see my mistake..
wow this list is nice..
Thanks again
newbie
On Fri, 2003-11-21 at 14:10, Eric Walker wrote:
OK hash should look like this.
M -anonhash
a - value;
b- value;
c- value;
does that help?
On Fri, 2003-11-21 at 14:04, Bob Showalter wrote:
Eric Walker wrote:
Hey all I know I have been told but I can't seem to access this hash.
Can anyone look and see why I can't print out any values. The print
item statement works and prints out the first level of the hash.
I send in a pointer to $data and $rule.
sub COMMENTSYNC{
my($rule,$data) = @_;
my($crule,$temp,@map,$count);
foreach my $item (keys %{$$data}){
Here you're using $data as a reference to a scalar (which is in turn a
reference to a hash). Is that really what $data is?
print %{$$data{$item}{'rule_desc'}} . \n;
Here you're using $data as a reference to a hash. To be consistent with the
usage above, you would write that as $$data-{$item}. Also, why are you
trying to print a hash? That's odd.
#print $item . \n; }
Show us your data, and show us what you expect to be printed. I can't figure
out what's going on. But then again, I'm not real smart.
search
I am trying to search a string for a []. I want to count the amount of [] in the string. Any IDeas
Pointers
Hello all, newbie here got a few questions: I am working with pointers and I sort of understand them and then I don't. I understand that instead of making a variable for a particular value you can use a pointer to access the same data. So the new variable stores the pointer to the old data. ie $a = mom; $b = \$b; print $$b -- mom Ok so what I don't understand is when do I need to dereference the pointer for hashes. so I have a hash pointer.. \%overData. Now how do I access this hash. %$overData? Thanks confused. newbie
RE: Pointers
ok why the $$ instead of the %$?
sorry confused.
On Thu, 2003-11-20 at 12:08, Paul Kraus wrote:
$$overdate{key}
Perldoc perlref
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 20, 2003 2:03 PM
To: perlgroup
Subject: Pointers
Hello all, newbie here got a few questions:
I am working with pointers and I sort of understand them and then I
don't. I understand that instead of making a variable for a particular
value you can use a pointer to access the same data. So the new
variable stores the pointer to the old data. ie $a = mom;
$b = \$b;
print $$b -- mom
Ok so what I don't understand is when do I need to dereference the
pointer for hashes. so I have a hash pointer.. \%overData. Now how do
I access this hash. %$overData?
Thanks
confused.
newbie
RE: Pointers
ok that explains it.. Thanks
newbie not confused for the moment
On Thu, 2003-11-20 at 12:23, Paul Kraus wrote:
Forget about references for a minute.
%hash - refers to the entire hash.
$hash{key} refers to one element of that hash.
So as a reference you would address the entire hash as %$hashref
Or a single element of that hash as $$hashref{key}
HTH
Paul
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 20, 2003 2:20 PM
To: Paul Kraus
Cc: 'perlgroup'
Subject: RE: Pointers
ok why the $$ instead of the %$?
sorry confused.
On Thu, 2003-11-20 at 12:08, Paul Kraus wrote:
$$overdate{key}
Perldoc perlref
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 20, 2003 2:03 PM
To: perlgroup
Subject: Pointers
Hello all, newbie here got a few questions:
I am working with pointers and I sort of understand them and then I
don't. I understand that instead of making a variable for a
particular
value you can use a pointer to access the same data. So the new
variable stores the pointer to the old data. ie $a = mom;
$b = \$b;
print $$b -- mom
Ok so what I don't understand is when do I need to dereference the
pointer for hashes. so I have a hash pointer.. \%overData. Now
how do
I access this hash. %$overData?
Thanks
confused.
newbie
RE: Pointers
wow ok then I will try and use the - notation. No need to stay behind
the times.
On Thu, 2003-11-20 at 12:23, Bakken, Luke wrote:
ok why the $$ instead of the %$?
sorry confused.
\%overData. Now how do
I access this hash. %$overData?
Because you're in essence doing this:
${ $overdata }{$key}
When you access a hash value, you're getting a scalar, which is why you
use a $. Perhaps this notation would be clearer:
$overdata-{$key}
I believe the arrow notation is more common in practice than the
double-$
Luke
RE: Pointers
Well see the key is I am passing a value to a sub this is a pointer and
I am having trouble getting access to the hash with in the subroutine
$Rules is a pointer given to me by a prewritten Database function.
sub(\$Rules);
I am actually passing in 2 hashes and need to compare the keys. so I am
using a nested foreach but can't access the values within each foreach.
hope this can clear it up a little.
On Thu, 2003-11-20 at 12:34, Daniel Staal wrote:
--As off Thursday, November 20, 2003 12:20 PM -0700, Eric Walker is
alleged to have said:
ok why the $$ instead of the %$?
sorry confused.
On Thu, 2003-11-20 at 12:08, Paul Kraus wrote:
$$overdate{key}
Perldoc perlref
--As for the rest, it is mine.
$$ would get you the value of a certain value in the hash. (The
scalar value of the hash element.) %$ would get you the entire hash.
Most often people want one value of the hash, not the whole hash,
though both have their uses.
Daniel T. Staal
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Re: matching
The /g modifier worked thanks all. I needed to take the quotes in the
file and backslash them so the file could be read into one of our tools
without a problem. Thanks for the short version too. I never thought
of it that way.
Newbie..
On Mon, 2003-11-17 at 20:37, Tore Aursand wrote:
On Mon, 17 Nov 2003 15:18:47 -0700, Eric Walker wrote:
How do I get it to do more than one substitution in the string.
By using the /g modifier.
$_ = $$Rules{$yes}{rule_desc};
No. Don't _ever_ try to set $_ yourself, unless you _really_ have to
(which you don't in this case).
$_ = $$Rules{$yes}{rule_desc};
s//\\/;
$$Rules{$yes}{rule_desc} = $_;
These three lines could easily have been shortened down to only one;
$$Rules{$yes}{rule_desc} =~ s//\\/g;
However: Why do you need to quote the characters?
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matching
I have the following code to find a quote in a string and replace it
with a slashquote.
ie goes to \
How do I get it to do more than one substitution in the string.
$_ = $$Rules{$yes}{rule_desc};
s//\\/;
$$Rules{$yes}{rule_desc} = $_;
newbie...
Re: matching
Thanks that worked
On Mon, 2003-11-17 at 15:27, James Edward Gray II wrote:
On Nov 17, 2003, at 4:18 PM, Eric Walker wrote:
I have the following code to find a quote in a string and replace it
with a slashquote.
ie goes to \
How do I get it to do more than one substitution in the string.
The /g modifier, for global.
$_ = $$Rules{$yes}{rule_desc};
s//\\/;
$$Rules{$yes}{rule_desc} = $_;
Let's clean that up a little. We don't need $_ here.
$$Rules{$yes}{rule_desc} =~ s//\\/g;
How's that?
James
Re: Simple CGI question
Newbie here but hope this helps. You have a page linked to the frame on the left right? All you need to do is have your CGI script write the new page. You use the info from the frame on the right and pass the values to your cgi script. Then let your CGI script write out a new html page using the values you sent it. Ok heres is the hard part.. All of you pros correct me if I am wrong. In the past I have use the use CGI module. When you click submit you need to call your cgi a certain way to pass the values from the form to it. http://myfile.cgi?variablename=valuevariablename=valuevariablename=value you need a variablename and value for every variable value pair you need to send to the CGI. Once you get to doing the CGI this is your next step. Make sure you have use CGI; and my $q = new CGI; toward the top of the file. $myvariable = $q-param(variablename); This will take the value sent to the CGI and put it into $myvariable. After that you just print the value the the html page linked in your left frame. I think you will have to do a refresh to get the new content to show. Hope this helps and hope I am not too terribly off. PEACE Beginner On Thu, 2003-11-06 at 17:11, Jack wrote: Hello, I'm trying to redirect the output of my CGI (written in Perl) to another frame, but I'm not exactly sure how to do this. i.e. I have two frames on my page one on the right and one on the left. There is a form on the right frame. When the user clicks on the Submit button on my form, I'd like to call a CGI script and redirect its output to the left frame. Could anyone please tell me how I can do this? Any help would be greatly appreciated. Thanks, Jack __ Post your free ad now! http://personals.yahoo.ca -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
PERLTK
Anyone know how I can set up a bind event to alow a menu button such as say File to show the sub menu? I have F in file underlined and want to be able to hit like alt-f and get the sub menu to show. Any Ideas or examples? EDOG
packages object oriented
Does anyone have a good hold of how to do object oriented programming in perl? Maybe a few lines of code as examples? EDUB
Re: packages object oriented
I have a small grasp of the concept, but what I am doing involves a better understanding than I have. I am doing a project that will allow a user to build a particular file called a do file. Its used in a route tool called iccraftsman. In this particular file it has several sections. Each section has a few things that are alike. It seems that when I am done this is going to be a pretty big program as we have lots of ideas about functionality. So I figured I would try to do it in OOP style for ease of future changes and maintainance. Hope this helps.. EDUB On Fri, 2003-09-12 at 08:42, James Edward Gray II wrote: On Friday, September 12, 2003, at 09:32 AM, Eric Walker wrote: Does anyone have a good hold of how to do object oriented programming in perl? Maybe a few lines of code as examples? I feel my grasp of the concept is strong, but perhaps myself, and others, could help more if we knew what you're trying. Are you familiar with Object Oriented Programming concepts in general? Have you used it other languages? Object Oriented Perl is an excellent book, if you're interested. James
Re: packages object oriented
Thanks all for the good resources on OOP. I have been reading a few perl books and it seemed not to sink in. the link that I got on the web does it for me. The light has clicked. Now I just have to read the rest and apply it. Thanks again all for your help. EDUB On Fri, 2003-09-12 at 10:48, Steve Grazzini wrote: On Fri, Sep 12, 2003 at 08:32:38AM -0600, Eric Walker wrote: Does anyone have a good hold of how to do object oriented programming in perl? Maybe a few lines of code as examples? There are some tutorials in the standard docs. $ perldoc perlobj $ perldoc perlboot $ perldoc perltoot You'll also need (as I believe the tutorials will tell you) to understand subroutines, packages and modules, and references. $ perldoc perlmod $ perldoc perlsub $ perldoc perlreftut $ perldoc perlref -- Steve
PROCESS ID
Hello all I want to us the variable $ to get the REAL UID of the perl program that is running. How can I get the users name from that number it gives me? Thanks Eric Walker
RE: PROCESS ID
I don'tknow if this is the best way but I ended up doing this: my $UID = getpwuid($); my @GROUPS = split( ,`groups $UID`); Which gets the groups that the user who is running my script belongs too. correct me if I am wrong? EDOG On Wed, 2003-08-27 at 16:00, Dan Muey wrote: Hello all Howdy I want to us the variable $ to get the REAL UID of the perl program that is running. How can I get the users name from that number it gives me? Depends on the system. Have you looked on cpan for a module that does that? You can always qx() the same way you'd do it via command line. IE if you can do $ /usr/bin/sername 0 root $ Then you can do perhaps: my $userfromid = qx(/usr/bin/username $); HTH DMuey Thanks Eric Walker -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
HASH PROBLEM!!
I have a check I am doing with a hash.
if (exists $deref{$drcrule})
This check fails as if the keyvalue is a part of the hash, but when I
print out the keys like this
foreach my $item (%{$deref}){
print $item\n;
}
And it is not in the list. I ran this on a previous data that had this
in the hash, does perl not clean the address space. Is it possible for
this data to be lingering from that last run?
Thanks...
Re: HASH PRINTING
[EMAIL PROTECTED] wrote:
I started to write it but didn't reach to finish it.
Any way, the main idea is
unless (ref = scalar) {
if (ref = hash) {
enter another layer
}
elsif (ref = array) {
print @Array
}
}
print $HASH{$KEY}
HTH,
Yargo!
Original Message:
-
From: R. Joseph Newton [EMAIL PROTECTED]
Date: Thu, 03 Apr 2003 18:04:43 -0800
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
Subject: Re: HASH PRINTING
Eric Walker wrote:
I have a HASH with a mixture of single, double and triple layers.
exampl hash of hash of array's etc
I try to dump and see values of the entire db but I get pointers and
memory addresses. Below is my code Please help.
foreach my $item (keys %hData){
print ($item: $hData{$item}\n);
}
Thanks
Eric
Stay tuned on this list. I am creating this some plumbing facilites for
such structures on another thread.
Joseph
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Sorry for the ignorance but I think I am able to pull the first layer of
the hash but the values that are also hashes or arrays I get memory
pointers out .
For example:
TEMP: 2.0
TEMP5: ARRAY(0xdb660)
TEMP6: HASH(0xa2058)
Any suggestions on how to access the array and or hash at that point?
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printing
I can't remember how to setup a print statement to say print 60 #; I think its something like print (\*,40); please help Eric -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
HASH PRINTING
I have a HASH with a mixture of single, double and triple layers.
exampl hash of hash of array's etc
I try to dump and see values of the entire db but I get pointers and
memory addresses. Below is my code Please help.
foreach my $item (keys %hData){
print ($item: $hData{$item}\n);
}
Thanks
Eric
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Re: HASH PRINTING
David Olbersen wrote:
Eric,
Use Data::Dumper, it'll do this very well if it's just for debugging purposes.
Check out the documentation on cpan.org:
http://search.cpan.org/author/JHI/perl-5.8.0/ext/Data/Dumper/Dumper.pm
or `man Data::Dumper` if you're on a UNIX machine.
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iGuard Engineer
11415 West Bernardo Court
San Diego, CA 92127
1-858-676-2277 x2152
-Original Message-
From: Eric Walker [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 03, 2003 11:37 AM
To: [EMAIL PROTECTED]
Subject: HASH PRINTING
I have a HASH with a mixture of single, double and triple layers.
exampl hash of hash of array's etc
I try to dump and see values of the entire db but I get pointers and
memory addresses. Below is my code Please help.
foreach my $item (keys %hData){
print ($item: $hData{$item}\n);
}
Thanks
Eric
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I don't know if I am reading the data dumper help code right but it seems you
have to provide a list of the hash keys to get the values. I need a way to
just print out all keys and values no matter how many levels of hierachy there
may be in the hash.
Thanks
Eric
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Re: HASH PRINTING
Jenda Krynicky wrote:
From: Eric Walker [EMAIL PROTECTED]
David Olbersen wrote:
From: Eric Walker [mailto:[EMAIL PROTECTED]
I have a HASH with a mixture of single, double and triple layers.
exampl hash of hash of array's etc I try to dump and see
values of the entire db but I get pointers and memory addresses.
Below is my code Please help.
foreach my $item (keys %hData){
print ($item: $hData{$item}\n);
}
Eric,
Use Data::Dumper, it'll do this very well if it's just for debugging
purposes.
Check out the documentation on cpan.org:
http://search.cpan.org/author/JHI/perl-5.8.0/ext/Data/Dumper/Dumper.
pm
or `man Data::Dumper` if you're on a UNIX machine.
I don't know if I am reading the data dumper help code right but it
seems you have to provide a list of the hash keys to get the values.
I need a way to just print out all keys and values no matter how many
levels of hierachy there may be in the hash.
Thanks
Eric
No you are not reading it correctly.
Just try and see.
print Dumper(\%hData);
Jenda
= [EMAIL PROTECTED] === http://Jenda.Krynicky.cz =
When it comes to wine, women and song, wizards are allowed
to get drunk and croon as much as they like.
-- Terry Pratchett in Sourcery
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Thanks. I am getting output now. lets just hope I can pick it up the right
way and print to file in formatted output.
Thanks
E
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INFO PLEASE
how can I see where modules are installed no matter if they are personal or come with perl also how can I tell what functions are available for them. Thanks -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: INFO PLEASE
Jaimee Spencer wrote:
Hello, Eric.
Copy and paste the below code and try it
out. You will need the File::Find
module installed.
Regards,
Jaimee
#!/usr/bin/perl -w
# list all of the perl modules installed
use strict;
use File::Find
;
for (@INC) { find(\modules,$_) ; }
sub modules
{
if (-d
/^[a-z]/) { $File::Find::prune
= 1 ; return }
return unless
/\.pm$/ ;
my $fullPath
= "$File::Find::dir/$_";
$fullPath
=~ s!\.pm$!!;
$fullPath
=~ s#/(\w+)$#::$1# ;
print "$fullPath
\n";
}
-Original Message-----
From: Eric Walker [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 26, 2003 10:05 AM
To: [EMAIL PROTECTED]
Subject: INFO PLEASE
how can I see where modules are installed no matter if
they are personal or come with perl
also how can I tell what functions are available for
them.
Thanks
Thanks
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