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Full Discussion: File Parser
Top Forums Shell Programming and Scripting File Parser Post 302816931 by Don Cragun on Wednesday 5th of June 2013 12:20:46 AM
Old 06-05-2013
Quote:
Originally Posted by jim mcnamara
Code:
myvar="&&TAG"
awk -v var="$myvar" '/$49/ ~ var { do something with field 49 == &&TAG} 'infile

Pass shell variables to nawk or awk with -v[awkvarname]=$shellvar
Hi Jim,
Am I correct in assuming that the / characters marked in red above were typos? I don't think they should be there.

Also note that although the standards require conforming implementations of awk to accept -v options and their option-arguments to be accepted in either of the forms:
Code:
-vAwkVarVame=$ShellVarName

and
Code:
-v AwkVarName=$ShellVarName

some buggy implementations (including awk on Mac OS X 10.7.5) won't accept a -v option unless the -v and its option-argument are in separate arguments.
 

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LEARN ABOUT MOJAVE

xml::parser::style::tree5.18

Parser::Style::Tree(3)					User Contributed Perl Documentation				    Parser::Style::Tree(3)

NAME

       XML::Parser::Style::Tree

SYNOPSIS

	 use XML::Parser;
	 my $p = XML::Parser->new(Style => 'Tree');
	 my $tree = $p->parsefile('foo.xml');

DESCRIPTION

       This module implements XML::Parser's Tree style parser.

       When parsing a document, "parse()" will return a parse tree for the document. Each node in the tree takes the form of a tag, content pair.
       Text nodes are represented with a pseudo-tag of "0" and the string that is their content. For elements, the content is an array reference.
       The first item in the array is a (possibly empty) hash reference containing attributes. The remainder of the array is a sequence of tag-
       content pairs representing the content of the element.

       So for example the result of parsing:

	 <foo><head id="a">Hello <em>there</em></head><bar>Howdy<ref/></bar>do</foo>

       would be:
		    Tag   Content
	 ==================================================================
	 [foo, [{}, head, [{id => "a"}, 0, "Hello ",  em, [{}, 0, "there"]],
		     bar, [	    {}, 0, "Howdy",  ref, [{}]],
		       0, "do"
	       ]
	 ]

       The root document "foo", has 3 children: a "head" element, a "bar" element and the text "do". After the empty attribute hash, these are
       represented in it's contents by 3 tag-content pairs.

perl v5.18.2							    2011-05-24						    Parser::Style::Tree(3)
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