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Full Discussion: Help with sed substitution
Top Forums UNIX for Dummies Questions & Answers Help with sed substitution Post 302379729 by stabby on Friday 11th of December 2009 07:01:22 PM
Old 12-11-2009
Help with sed substitution
I'm a noob to unix, and I have a line of data like the following:
title=Boston|tcolor=green|desc=Large city in New England|url=www.boston.com

Is there a way to change a field value with sed substitution?
(i.e. change tcolor=green to tcolor=blue)

I figured out: sed 's/tcolor=.*|/tcolor=blue|/'

...but because of the whole greedy thing, it replaces everything from tcolor= up until the last "|"


For a bit of context, the entire script gets passed values for $title, $tcolor, $desc, and $url... if $title matches a data item that already has that title, than I have to update its other fields to the new values.

I hope that all makes sense.... i appreciate any hints you can give me! :-)
 

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LEARN ABOUT DEBIAN

template::plugin::xml::rss

Template::Plugin::XML::RSS(3pm) 			User Contributed Perl Documentation			   Template::Plugin::XML::RSS(3pm)

NAME

       Template::Plugin::XML::RSS - Plugin interface to XML::RSS

SYNOPSIS

	   [% USE news = XML.RSS('news.rdf') %]

	   [% FOREACH item IN news.items %]
	      [% item.title %]
	      [% item.link  %]
	   [% END %]

DESCRIPTION

       This Template Toolkit plugin provides a simple interface to the XML::RSS module.

	   [% USE news = XML.RSS('mysite.rdf') %]

       It creates an XML::RSS object, which is then used to parse the RSS file specified as a parameter in the USE directive.  A reference to the
       XML::RSS object is then returned.

       An RSS (Rich Site Summary) file is typically used to store short news 'headlines' describing different links within a site.  This example
       is extracted from http://slashdot.org/slashdot.rdf.

	   <?xml version="1.0"?>
	   <rdf:RDF
	     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
	     xmlns="http://my.netscape.com/rdf/simple/0.9/">

	     <channel>
	       <title>Slashdot:News for Nerds. Stuff that Matters.</title>
	       <link>http://slashdot.org</link>
	       <description>News for Nerds.  Stuff that Matters</description>
	     </channel>

	     <image>
	       <title>Slashdot</title>
	       <url>http://slashdot.org/images/slashdotlg.gif</url>
	       <link>http://slashdot.org</link>
	     </image>

	     <item>
	       <title>DVD CCA Battle Continues Next Week</title>
	       <link>http://slashdot.org/article.pl?sid=00/01/12/2051208</link>
	     </item>

	     <item>
	       <title>Matrox to fund DRI Development</title>
	       <link>http://slashdot.org/article.pl?sid=00/01/13/0718219</link>
	     </item>

	     <item>
	       <title>Mike Shaver Leaving Netscape</title>
	       <link>http://slashdot.org/article.pl?sid=00/01/13/0711258</link>
	     </item>

	   </rdf:RDF>

       The attributes of the channel and image elements can be retrieved directly from the plugin object using the familiar dotted compound nota-
       tion:

	   [% news.channel.title  %]
	   [% news.channel.link   %]
	   [% news.channel.etc... %]

	   [% news.image.title	  %]
	   [% news.image.url	  %]
	   [% news.image.link	  %]
	   [% news.image.etc...   %]

       The list of news items can be retrieved using the 'items' method:

	   [% FOREACH item IN news.items %]
	      [% item.title %]
	      [% item.link  %]
	   [% END %]

AUTHORS

       This plugin was written by Andy Wardley inspired by an article in Web Techniques by Randal Schwartz.

       The XML::RSS module, which implements all of the functionality that this plugin delegates to, was written by Jonathan Eisenzopf.

COPYRIGHT

       Copyright (C) 1996-2006 Andy Wardley.  All Rights Reserved.

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

       Template::Plugin, XML::RSS, XML::Parser

perl v5.8.8							    2008-03-01					   Template::Plugin::XML::RSS(3pm)
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