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Top Forums Shell Programming and Scripting Parse output path to set variable Post 302737273 by Corona688 on Wednesday 28th of November 2012 03:56:12 PM
Old 11-28-2012
Running awk 10,000 times to handle 10,000 individual lines is like making 10,000 phone calls to say 10,000 words. If you're not going to use awk on more than one line at once you shouldn't bother using it at all. It's not a builtin. It's a programming language. Imagine running perl 10,000 times to handle 10,000 lines. Same problem.

You don't even need it. Ordinary shell operations will work here. Here's one method:

Code:
OLDIFS="$IFS"
IFS=" /"

while read LINE
do
        # Divide "39292 /home/project_A/users/jdoe" into
        # $1=39292, $2=home, $3=project_A, $4=users, $5=djoe
        set -- $LINE

        COUNT=$1 # Save the total
        shift $(($# - 1)) # Turf all but the last argument
        USER=$1 # That will be the username

done < inputfile

IFS="$OLDIFS"

Zero external commands per line instead of two.
This User Gave Thanks to Corona688 For This Post:
 

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HTML::Parse(3)						User Contributed Perl Documentation					    HTML::Parse(3)

NAME
HTML::Parse - Deprecated, a wrapper around HTML::TreeBuilder SYNOPSIS
See the documentation for HTML::TreeBuilder DESCRIPTION
Disclaimer: This module is provided only for backwards compatibility with earlier versions of this library. New code should not use this module, and should really use the HTML::Parser and HTML::TreeBuilder modules directly, instead. The "HTML::Parse" module provides functions to parse HTML documents. There are two functions exported by this module: parse_html($html) or parse_html($html, $obj) This function is really just a synonym for $obj->parse($html) and $obj is assumed to be a subclass of "HTML::Parser". Refer to HTML::Parser for more documentation. If $obj is not specified, the $obj will default to an internally created new "HTML::TreeBuilder" object configured with strict_comment() turned on. That class implements a parser that builds (and is) a HTML syntax tree with HTML::Element objects as nodes. The return value from parse_html() is $obj. parse_htmlfile($file, [$obj]) Same as parse_html(), but pulls the HTML to parse, from the named file. Returns "undef" if the file could not be opened, or $obj otherwise. When a "HTML::TreeBuilder" object is created, the following variables control how parsing takes place: $HTML::Parse::IMPLICIT_TAGS Setting this variable to true will instruct the parser to try to deduce implicit elements and implicit end tags. If this variable is false you get a parse tree that just reflects the text as it stands. Might be useful for quick & dirty parsing. Default is true. Implicit elements have the implicit() attribute set. $HTML::Parse::IGNORE_UNKNOWN This variable contols whether unknow tags should be represented as elements in the parse tree. Default is true. $HTML::Parse::IGNORE_TEXT Do not represent the text content of elements. This saves space if all you want is to examine the structure of the document. Default is false. $HTML::Parse::WARN Call warn() with an apropriate message for syntax errors. Default is false. REMEMBER! HTML::TreeBuilder objects should be explicitly destroyed when you're finished with them. See HTML::TreeBuilder. SEE ALSO
HTML::Parser, HTML::TreeBuilder, HTML::Element COPYRIGHT
Copyright 1995-1998 Gisle Aas, 1999-2004 Sean M. Burke, 2005 Andy Lester, 2006 Pete Krawczyk. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. AUTHOR
Currently maintained by Pete Krawczyk "<petek@cpan.org>" Original authors: Gisle Aas, Sean Burke and Andy Lester. perl v5.12.1 2006-08-06 HTML::Parse(3)
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