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Top Forums UNIX for Dummies Questions & Answers Grep file and print value only if the following line doesnt contain value xxxx Post 302930903 by mutley2202 on Thursday 8th of January 2015 01:36:14 PM
Old 01-08-2015
Grep file and print value only if the following line doesnt contain value xxxx

Hi All,
I have some large files which I would like to obtain some data from, I want to grep (or alturnative method) out certain values hut only if the folowing line doesnt contain a certain value. I will explain better below showing an example print of the data.

Code:
NE : V0001
NE : V0002
NE : V0003
NE : V0004
ccc
NE : V00005
ccc
NE : V00006

from the above I want to print every line where NE : is present but only if the line under doesnt contain NE :

I'm sure one of you guys will be able to help.

Thanks again.
 

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SVK::Log::Filter::Grep(3)				User Contributed Perl Documentation				 SVK::Log::Filter::Grep(3)

SYNOPSIS
SVK::Log::Filter::Grep - search log messages for a given pattern DESCRIPTION
The Grep filter requires a single Perl pattern (regular expression) as its argument. The pattern is then applied to the svn:log property of each revision it receives. If the pattern matches, the revision is allowed to continue down the pipeline. If the pattern fails to match, the pipeline immediately skips to the next revision. The pattern is applied with the /i modifier (case insensitivity). If you want case-sensitivity or other modifications to the behavior of your pattern, you must use the "(?imsx-imsx)" extended pattern (see "perldoc perlre" for details). For example, to search for log messages that match exactly the characters "foo" you might use svk log --filter "grep (?-i)foo" However, to search for "foo" without regards for case, one might try svk log --filter "grep foo" The result of any capturing parentheses inside the pattern are not available. If demand dictates, the Grep filter could be modified to place the captured value somewhere in the stash for other filters to access. If the pattern contains a pipe character ('|'), it must be escaped by preceding it with a '' character. Otherwise, the portion of the pattern after the pipe character is interpreted as the name of a log filter. STASH
/PROPERTY MODIFICATIONS Grep leaves all properties and the stash intact. perl v5.10.0 2008-08-04 SVK::Log::Filter::Grep(3)
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