Sponsored Content
Top Forums Shell Programming and Scripting Pattern matching in file and then display 10 lines above every time Post 302162954 by drl on Wednesday 30th of January 2008 08:59:23 PM
Old 01-30-2008
Hi, KevinADC.
Quote:
Originally Posted by KevinADC
The English module is known to create inefficiencies in perl programs. See the English man page for details: English - perldoc.perl.org

I am not sure if it affects the code you posted drl but you may want to take a look.
I looked over the reference, and added the sequence qw( -no_match_vars ) to my template. The warning is about a degradation in RE matching specifically. I added it to the short code I posted and it didn't seem to make a noticeable difference in a quick test (2 lines matched from the US Constitution from about 1000 lines). On the other hand, it's an easy thing to add.

Thanks for making me aware of that. Damian Conway does mention that in Perl Best Practices, but I haven't implemented all of that yet ... cheers, drl
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Reading lines in a file matching a pattern

Hi, I need to redirect the lines in a file to a different file if the character starting from 2 to 6 in the line are numerical . Please let me know if anyone have any script to do this. Thanks, Ranjit (4 Replies)
Discussion started by: torenji
4 Replies

2. Shell Programming and Scripting

counting the lines matching a pattern, in between two pattern, and generate a tab

Hi all, I'm looking for some help. I have a file (very long) that is organized like below: >Cluster 0 0 283nt, >01_FRYJ6ZM12HMXZS... at +/99% 1 279nt, >01_FRYJ6ZM12HN12A... at +/99% 2 281nt, >01_FRYJ6ZM12HM4TS... at +/99% 3 283nt, >01_FRYJ6ZM12HM946... at +/99% 4 279nt,... (4 Replies)
Discussion started by: d.chauliac
4 Replies

3. Shell Programming and Scripting

delete lines in file matching a pattern

I have a text file, a sample of which is as follows: r/- * 0: WINDOWS/Microsoft.NET/Framework/v2.0.50727/ASP.NETWebAdminFiles/Images/headerGRADIENT_Tall.gif r/- * 0: WINDOWS/SoftwareDistribution/Download/cf8ec753e88561d2ddb53e183dc05c3e/backoff.jpg r/- * 0: ... (2 Replies)
Discussion started by: stumpyuk
2 Replies

4. Shell Programming and Scripting

pattern matching lines using the date, and then joining the lines

Hi Guys, Was trying to attempt the below using awk and sed, have no luck so far, so any help would be appreciated. Current Text File: The first line has got an "\n", and the second line has got spaces/tabs then the word and "\n" TIME SERVER/CLIENT TEXT... (6 Replies)
Discussion started by: eo29
6 Replies

5. Shell Programming and Scripting

Finding lines matching the Pattern and their previous lines in a file

Hi, I am trying to locate the occurences of certain pattern like 'Possible network disconnect' in a text file. I can get the actual lines matching the pttern using: grep -w 'Possible network disconnect' file_name. But I am more interested in getting the timing of these events which are... (7 Replies)
Discussion started by: sagarparadkar
7 Replies

6. UNIX for Dummies Questions & Answers

FIND matching pattern of lines in a file

I need to search for two patterns in a file and find number of matching lines. find . -type f | xargs grep "DROP TABLE" | wc -l find . -type f | xargs grep "DROP SYNONYM" | wc -l The above code works. However I am looking at finding a commnd that will simplify as on a singe command... (2 Replies)
Discussion started by: Siva SQL
2 Replies

7. Shell Programming and Scripting

Want to print out lines with a matching pattern from file

Hi all, I want to search for strings in file1 that can be found in file2 and print out the whole line when matching pattern is found. I have used the below command, but this is not working for me, because it is writing out only the matching patterns from file2, not the whole line. fgrep -o... (2 Replies)
Discussion started by: MonikaB
2 Replies

8. Shell Programming and Scripting

Sed: printing lines AFTER pattern matching EXCLUDING the line containing the pattern

'Hi I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match. Which option is to be used to exclude the line containing the pattern? sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)
Discussion started by: essem
11 Replies

9. UNIX for Dummies Questions & Answers

Grep -v lines starting with pattern 1 and not matching pattern 2

Hi all! Thanks for taking the time to view this! I want to grep out all lines of a file that starts with pattern 1 but also does not match with the second pattern. Example: Drink a soda Eat a banana Eat multiple bananas Drink an apple juice Eat an apple Eat multiple apples I... (8 Replies)
Discussion started by: demmel
8 Replies

10. Shell Programming and Scripting

Display all lines after a matching variable

Hi, I have a file called abc.txt with the following dates 2016-01-27 2016-01-28 2016-01-29 2016-01-30 2016-01-31 2016-02-01 2016-02-02 2016-02-03 I would like to print all lines below if 2016-01-31 is found, excluding that date. I use this command --> sed '1,/2016-01-31/d' abc.txt If... (4 Replies)
Discussion started by: Nagesh_1985
4 Replies
Parse::ErrorString::Perl(3pm)				User Contributed Perl Documentation			     Parse::ErrorString::Perl(3pm)

NAME
Parse::ErrorString::Perl - Parse error messages from the perl interpreter VERSION
version 0.15 SYNOPSIS
use Parse::ErrorString::Perl; my $parser = Parse::ErrorString::Perl->new; # or: my $parser = Parse::ErrorString::Perl->new(lang => 'FR') # to get localized explanations my @errors = $parser->parse_string($string_containing_stderr_output); foreach my $error(@errors) { print 'Captured error message "' . $error->message . '" in file ' . $error->file . ' on line ' . $error->line . " "; } METHODS
new(lang => $lang) Constructor. Receives an optional "lang" parameter, specifying that error explanations need to be delivered in a language different from the default (i.e. English). Will try to load "POD2::$lang::perldiag". parse_string($string) Receives an error string generated from the perl interpreter and attempts to parse it into a list of "Parse::ErrorString::Perl::ErrorItem" objects providing information for each error. SEE ALSO
splain ACKNOWLEDGEMENTS
Part of this module is based on code from splain. BUGS
Please report any bugs or feature requests to "bug-parse-errorstring-perl at rt.cpan.org", or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Parse-ErrorString-Perl>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. SUPPORT
You can find documentation for this module with the perldoc command. perldoc Parse::ErrorString::Perl o RT: CPAN's request tracker <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Parse-ErrorString-Perl> o AnnoCPAN: Annotated CPAN documentation <http://annocpan.org/dist/Parse-ErrorString-Perl> o CPAN Ratings <http://cpanratings.perl.org/d/Parse-ErrorString-Perl> o Search CPAN <http://search.cpan.org/dist/Parse-ErrorString-Perl/> AUTHORS
o Petar Shangov, "<pshangov at yahoo.com>" o Gabor Szabo <http://szabgab.com/> o Ahmad M. Zawawi <ahmad.zawawi@gmail.com> COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by Petar Shangov. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.10.1 2010-11-29 Parse::ErrorString::Perl(3pm)
All times are GMT -4. The time now is 02:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy