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Top Forums Shell Programming and Scripting Multi line extraction based on condition Post 302909854 by reldb on Monday 21st of July 2014 03:05:53 AM
Old 07-21-2014
Scissors Multi line extraction based on condition

Hi

I have some data in a file as below

Code:
******************************
Class 1A
Students absent are :
1. ABC
2. CDE
3. CPE

******************************
Class 2A
Students absent are :

******************************
Class 3A
Students absent are :

******************************
Class 17ACF
Students absent are :
1. ABCD
2. XYZ

From this file i just need to fetch/extract the data where ever there is some value for Students absent
Class name is dynamic and no of absent students are also dynamic
E.g. Output should look like

Code:
******************************
Class 1A
Students absent are :
1. ABC
2. CDE
3. CPE

******************************
Class 17ACF
Students absent are :
1. ABCD
2. XYZ

Pls help how could i do it via simple command or a script.

Thanks in advance
rel

Last edited by reldb; 07-21-2014 at 04:37 AM.. Reason: adding the code tag
 

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Class::Accessor::Fast(3)				User Contributed Perl Documentation				  Class::Accessor::Fast(3)

NAME
Class::Accessor::Fast - Faster, but less expandable, accessors SYNOPSIS
package Foo; use base qw(Class::Accessor::Fast); # The rest is the same as Class::Accessor but without set() and get(). DESCRIPTION
This is a faster but less expandable version of Class::Accessor. Class::Accessor's generated accessors require two method calls to accompish their task (one for the accessor, another for get() or set()). Class::Accessor::Fast eliminates calling set()/get() and does the access itself, resulting in a somewhat faster accessor. The downside is that you can't easily alter the behavior of your accessors, nor can your subclasses. Of course, should you need this later, you can always swap out Class::Accessor::Fast for Class::Accessor. Read the documentation for Class::Accessor for more info. EFFICIENCY
"EFFICIENCY" in Class::Accessor for an efficiency comparison. AUTHORS
Copyright 2007 Marty Pauley <marty+perl@kasei.com> This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. That means either (a) the GNU General Public License or (b) the Artistic License. ORIGINAL AUTHOR Michael G Schwern <schwern@pobox.com> SEE ALSO
Class::Accessor perl v5.18.2 2009-09-15 Class::Accessor::Fast(3)
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