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Operating Systems Linux Linux command to find and replace occurance of more than two equal sign with "==" from XML file. Post 302661093 by alister on Sunday 24th of June 2012 06:53:37 PM
Old 06-24-2012
Quote:
Originally Posted by bakunin
... because there is a trick:

Code:
(cat /path/to/file) | sed '<somecommand>' > /path/to/file

This will work for files which are small enough to fit into memory. The downside is, that if anything goes wrong (power loss, reboot, process aborted, ...) your data will be irrevocably destroyed. You sure do not want to use this hack on critical data just to save a few GB of (temporary) diskspace.
That won't work even when there's just a single byte in the file, if the shell first creates the sed portion of the pipeline. There are no guarantees on which component of a pipeline will be created first.

Regards,
Alister
 

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GraphViz::XML(3pm)					User Contributed Perl Documentation					GraphViz::XML(3pm)

NAME
GraphViz::XML - Visualise XML as a tree SYNOPSIS
use GraphViz::XML; my $graph = GraphViz::XML->new($xml); print $g->as_png; DESCRIPTION
This module makes it easy to visualise XML as a tree. XML is hard for humans to grasp, especially if the XML is computer-generated. This modules aims to visualise the XML as a graph in order to make the structure of the XML clear and to aid in understanding the XML. XML elements are represented as diamond nodes, with links to elements within them. Character data is represented in round nodes. Note that the XML::Twig module should be installed. METHODS
new This is the constructor. It takes one mandatory argument, which is the XML to be visualised. A GraphViz object is returned. my $graph = GraphViz::XML->new($xml); as_* The XML can be visualised in a number of different graphical formats. Methods include as_ps, as_hpgl, as_pcl, as_mif, as_pic, as_gd, as_gd2, as_gif, as_jpeg, as_png, as_wbmp, as_ismap, as_imap, as_vrml, as_vtx, as_mp, as_fig, as_svg. See the GraphViz documentation for more information. The two most common methods are: # Print out a PNG-format file print $g->as_png; # Print out a PostScript-format file print $g->as_ps; BUGS
GraphViz tends to reorder the nodes. I hope to find a work around soon (possibly with ports). AUTHOR
Leon Brocard <acme@astray.com> COPYRIGHT
Copyright (C) 2001, Leon Brocard This module is free software; you can redistribute it or modify it under the same terms as Perl itself. perl v5.14.2 2012-04-02 GraphViz::XML(3pm)
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