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Full Discussion: Within an awk script
Top Forums UNIX for Dummies Questions & Answers Within an awk script Post 302943351 by shumail on Thursday 7th of May 2015 02:35:52 PM
Old 05-07-2015
Within an awk script
Just for my learning purpose, I appreciate of someone answer my question

Within an AWK script, test if Field # 4 is empty. If it is write out "Field 4 is empty", otherwise write the context of field 4.
 

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LEARN ABOUT MOJAVE

mail::field::generic

Mail::Field::Generic(3) 				User Contributed Perl Documentation				   Mail::Field::Generic(3)

NAME

       Mail::Field::Generic - implementation for inspecific fields

INHERITANCE

	Mail::Field::Generic
	  is a Mail::Field

SYNOPSIS

	use Mail::Field;
	my $field = Mail::Field->new('Subject', 'some subject text');
	my $field = Mail::Field->new(subject => 'some subject text');

DESCRIPTION

       A generic implementation for header fields without own implementation. This is fine for fields like "Subject", "X-Mailer", etc., where the
       field holds only a string of no particular importance/format.

       See documentation in the base class.

METHODS

       See documentation in the base class.

   Constructors
       See documentation in the base class.

       Mail::Field::Generic->combine(FIELDS)
	   See "Constructors" in Mail::Field

       Mail::Field::Generic->extract(TAG, HEAD [, INDEX ])
	   See "Constructors" in Mail::Field

       Mail::Field::Generic->new(TAG [, STRING | OPTIONS])
	   See "Constructors" in Mail::Field

   "Fake" constructors
       See documentation in the base class.

       $obj->create(OPTIONS)
	    -Option--Default
	     Text    ''

	   Text => STRING
       $obj->parse([STRING])
	   Set the new text, which is empty when no STRING is provided.

   Accessors
       See documentation in the base class.

       $obj->set(OPTIONS)
	   See "Accessors" in Mail::Field

       $obj->stringify()
	   See "Accessors" in Mail::Field

       $obj->tag()
       Mail::Field::Generic->tag()
	   See "Accessors" in Mail::Field

   Smart accessors
       See documentation in the base class.

       $obj->text([STRING])
	   See "Smart accessors" in Mail::Field

DETAILS

       See documentation in the base class.

DIAGNOSTICS

       Error: Undefined subroutine <method> called
	   Mail::Field objects use autoloading to compile new functionality.  Apparently, the method called is not implemented for the specific
	   class of the field object.

SEE ALSO

       This module is part of the MailTools distribution, http://perl.overmeer.net/mailtools/.

AUTHORS

       The MailTools bundle was developed by Graham Barr.  Later, Mark Overmeer took over maintenance without commitment to further development.

       Mail::Cap by Gisle Aas <aas@oslonett.no>.  Mail::Field::AddrList by Peter Orbaek <poe@cit.dk>.  Mail::Mailer and Mail::Send by Tim Bunce
       <Tim.Bunce@ig.co.uk>.  For other contributors see ChangeLog.

LICENSE

       Copyrights 1995-2000 Graham Barr <gbarr@pobox.com> and 2001-2007 Mark Overmeer <perl@overmeer.net>.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  See
       http://www.perl.com/perl/misc/Artistic.html

perl v5.18.2							    2014-01-05						   Mail::Field::Generic(3)
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