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Top Forums UNIX for Advanced & Expert Users Best way to search for patterns in huge text files Post 302385614 by andy2000 on Friday 8th of January 2010 04:27:50 PM
Old 01-08-2010
Bug Best way to search for patterns in huge text files

I have the following situation:

a text file with 50000 string patterns:

Code:
abc2344536
gvk6575556
klo6575556
....

and 3 text files each with more than 1 million lines:

Code:
...
000000 abc2344536      46575 0000
000000 abc2344536      46575 4444
000000 abc2344555      46575 1234
...

I have to extract all lines from the 3 files that match all patterns from the pattern file :-)

Any ideas, please!!!

Andy

Last edited by radoulov; 01-08-2010 at 05:32 PM.. Reason: Please use code tags!
 

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Imager::QRCode(3pm)					User Contributed Perl Documentation				       Imager::QRCode(3pm)

NAME
Imager::QRCode - Generate QR Code with Imager using libqrencode SYNOPSIS
use Imager::QRCode; my $qrcode = Imager::QRCode->new( size => 2, margin => 2, version => 1, level => 'M', casesensitive => 1, lightcolor => Imager::Color->new(255, 255, 255), darkcolor => Imager::Color->new(0, 0, 0), ); my $img = $qrcode->plot("blah blah"); $img->write(file => "qrcode.gif"); # or instance method use Imager::QRCode qw(plot_qrcode); my $img = plot_qrcode("blah blah", \%params); $img->write(file => "qrcode.gif"); DESCRIPTION
This module allows you to generate QR Code with Imager. This module use libqrencode '2.0.0' and above. METHODS
new $qrcode = Imager::QRCode->new(%params); The "new()" constructor method instantiates a new Imager::QRCode object. "new()" accepts the following parameters. o "size" - Horizontal and vertical size of module(dot). Default is 4. o "margin" - Margin size of QR Code. Default is 3. o "level" - Error collectin level. Valid values are 'M', 'L', 'Q' or 'H'. Default is 'L'. o "version" - Version of the symbol. If specify '0', this module chooses the minimum version for the input data. Default is '0'. o "mode" - Encoding mode. Valid values are 'numerical', 'alpha-numerical', '8-bit' or 'kanji'. Default is '8-bit'. If not give "casesensitive" then should be given "mode". If 'kanji' is given, characters will be encoded as Shift-JIS characters. If '8-bit' is given, all of non-alpha-numerical characters will be encoded as is. If you want to embed UTF-8 string, choose '8-bit'. o "casesensitive" - If your application is case-sensitive using 8-bit characters, set to '1'. Default is '0'. plot($text) $img = $qrcode->plot("blah blah"); Create a new QR Code image. This method returns Imager object ploted QR Code with the given text. INSTANT METHODS
plot_qrcode($text, \%params) Instant method. $text is input text. %params is same parameter as "new()". SEE ALSO
"Imager", "http://www.qrcode.com/", "http://megaui.net/fukuchi/works/qrencode/index.en.html" AUTHOR
Yoshiki KURIHARA "<kurihara __at__ cpan.org>" THANKS
Tokuhiro Matsuno LICENCE AND COPYRIGHT
Copyright (c) 2011, Yoshiki KURIHARA "<kurihara __at__ cpan.org>". This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic. perl v5.14.2 2012-12-16 Imager::QRCode(3pm)
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