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Full Discussion: Grep and append
Top Forums Shell Programming and Scripting Grep and append Post 302932491 by Satyak on Thursday 22nd of January 2015 12:34:48 AM
Old 01-22-2015
HP Grep and append

Have a string as below in a file.

"
Code:
anohter boy has id 000921 and girl has id=655 of roll number

"

using grep below commands with grep commands but able to get one string at a time, not able to append.

Code:
less <filename> | grep -o -P '(?<=id ).*(?=and )'

Code:
 
less <filename> | grep -o -P '(?<=id\= ).*(?=of )'

how to get output as :
Code:
000921 655

thanks

Last edited by Scrutinizer; 01-22-2015 at 04:01 AM.. Reason: 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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