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Top Forums Shell Programming and Scripting perl:: search for tow pattern and replace the third pattern Post 302375360 by nitindreamz on Friday 27th of November 2009 11:58:03 AM
Old 11-27-2009
perl:: search for tow pattern and replace the third pattern

Hi

i want to search two pattern on same line and replace onther pattern..

INPut file
Code:
aaaa bbbbb nnnnnn ttttt
cccc bbbbb nnnnnn ppppp
dddd ccccc nnnnnn ttttt
ffff bbbbb oooooo ttttt

now i want replace this matrix like.. i want search for "bbbbb","nnnnnn" and search and replace for "ttttt" to--->ppppp
i dont want like
Code:
"perl -i.bkup -p -e 's/ttttt/ppppp/ if /bbbbb nnnnnn/' filename"

(pls sugest in that i can use to if condition in same and how)
output file
Code:
aaaa bbbbb nnnnnn ppppp
cccc bbbbb nnnnnn ppppp
dddd ccccc nnnnnn ttttt
ffff bbbbb oooooo ttttt


Thanks in advace .. pls help me

Last edited by radoulov; 11-27-2009 at 03:38 PM.. Reason: Please use code tags.
 

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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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