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Full Discussion: Script regarding non numerical or empty value
Top Forums Shell Programming and Scripting Script regarding non numerical or empty value Post 302991723 by RudiC on Wednesday 15th of February 2017 05:05:03 PM
Old 02-15-2017
Nice approach! In fact, with the %d format specifier, you don't need the +0 as both an empty or a string field would result in a 0 to be printed:
Code:
cf file[1-3]
file1:
/ home k abc txt ABC DEF 
file2:
/ home k abc txt 92 1023
file3:
AB CD EF
awk '{printf("lines1=%d lines2=%d\n", $6, $7); exit }' file1
lines1=0 lines2=0
awk '{printf("lines1=%d lines2=%d\n", $6, $7); exit }' file2
lines1=92 lines2=1023
awk '{printf("lines1=%d lines2=%d\n", $6, $7); exit }' file3
lines1=0 lines2=0

The only drawback is when a field has a string starting with numeric characters like
Code:
cat file4
A B C D E F23 24G H

Your approach:
Code:
awk '{printf("lines1=%d lines2=%d\n", $6+0, $7+0); exit }' file4
lines1=0 lines2=24

My approach:
Code:
awk '{print "lines1=" ($6==$6+0?$6:0) " lines2=" ($7==$7+0?$7:0); exit}' file4
lines1=0 lines2=0

The OP needs to decide which one would satisfy his/her needs.
 

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LEARN ABOUT CENTOS

locale::codes::langfam

Locale::Codes::LangFam(3)				User Contributed Perl Documentation				 Locale::Codes::LangFam(3)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-02-27						 Locale::Codes::LangFam(3)
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