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Top Forums Shell Programming and Scripting extract lines based on few conditions Post 302247733 by radoulov on Thursday 16th of October 2008 09:37:00 AM
Old 10-16-2008
Quote:
Originally Posted by prvnrk
Thanks radoulov,

Your Solution worked like a charm.

Could you please tell me what does _ = "" [ after { print _; ] do?
[...]
Given your input format it's unnecessary.
You can remove it Smilie

Code:
awk -F, '/^AAA/ { _ = $0 }
/^BBB/ && !$5 { print _ }
' infile

 

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HXEXTRACT(1)							  HTML-XML-utils						      HXEXTRACT(1)

NAME
hxextract - extract selected elements from a HTML or XML file SYNOPSIS
hxextract [ -h | -? ] [ -x ] [ -s text ] [ -e text ] [ -b base ] element-or-class [ -c configfile | file-or-URL ] DESCRIPTION
hxextract outputs all elements with a certain name and/or class. Input must be well-formed, since no HTML heuristics are applied. OPTIONS
The following options are supported: -x Use XML format conventions. -s text Insert text at the start of the output. -e text Insert text at the end of the output. -b base URL base -c configfile Read @chapter lines from configfile (lines must be of the form "@chapter filename") and extract elements from each of those files. -h, -? Print command usage. OPERANDS
The following operands are supported: element-or-class The name of an element to extract (e.g., "H2"), or the name of a class preceded by "." (e.g., ".example") or a combination of both (e.g., "H2.example"). file-or-URL A file name or a URL. To read from standard input, use "-". ENVIRONMENT
To use a proxy to retrieve remote files, set the environment variables http_proxy and ftp_proxy. E.g., http_proxy="http://localhost:8080/" BUGS
Remote files (specified with a URL) are currently only supported for HTTP. Password-protected files or files that depend on HTTP "cookies" are not handled. (You can use tools such as curl(1) or wget(1) to retrieve such files.) SEE ALSO
hxselect(1) 6.x 10 Jul 2011 HXEXTRACT(1)
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