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Full Discussion: Code to get unique values
Top Forums UNIX for Beginners Questions & Answers Code to get unique values Post 303017159 by Scrutinizer on Thursday 10th of May 2018 06:52:36 AM
Old 05-10-2018
Sometimes you need to use zcat instead of gzcat

The sed statement:
Code:
sed -n                         # -n: Do not automatically print records
/CartService/                  # Look for lines that contain "CartService"
s/.*\(..:..:........\).*/\1/p  # Discard everything but the last pattern on the line that looks like:
                               # 2 chars - colon - 2 chars - colon - 6 chars 
                               # (the .* gobbles up the first pattern on the line)
                               # \1 is a so-called back reference, it refers to the pattern within the escaped brackets
                               # So what it all does - in short - is look for "CartService" and then
                               # replace the entire line with the pattern and if it can do that, print the line

The grep statement:
-E means use Extended Regular Expression.
-o means print only the matching part of the line (this option is non-standard and is not available in every grep utility).
[[:upper:]]{2}:[[:upper:]]{2}:[[:upper:]]{2}[[:digit:]]{6} means 2 uppercase letters - colon - 2 uppercase letters - colon - 2 uppercase letters + 6 digits.

Last edited by Scrutinizer; 05-10-2018 at 08:00 AM..
 

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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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