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Full Discussion: Questions on AWK
Top Forums UNIX for Dummies Questions & Answers Questions on AWK Post 302165429 by stevefox on Thursday 7th of February 2008 10:17:38 PM
Old 02-07-2008
Questions on AWK
Hi,
Could someone tell me how to use a varible in the one of the sections of the awk command below which adjusts the spacing (i.e. "%-5s%-10s%-15s")?

Code:
echo "1 2 3" | awk ' { printf("%-5s%-10s%-15s",$1,$2,$3); printf("\n"); } '

e.g. I have a variable named LENGTH which has the value 8 and I want to use this LENGTH variable in the "-10s%" section.


I tried specifying the varible with "-${LENGTH}s%" and "-$LENGTH\s%" but it did not work.

Any help will be greatly appreciated.

Steve
 

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LEARN ABOUT DEBIAN

test::data::scalar

Scalar(3pm)						User Contributed Perl Documentation					       Scalar(3pm)

NAME

       Test::Data::Scalar -- test functions for scalar variables

SYNOPSIS

	       use Test::Data qw(Scalar);

DESCRIPTION

       This modules provides a collection of test utilities for scalar variables.  Load the module through Test::Data.

   Functions
       blessed_ok( SCALAR )
	   Ok if the SCALAR is a blessed reference.

       defined_ok( SCALAR )
	   Ok if the SCALAR is defined.

       undef_ok( SCALAR )
	   Ok if the SCALAR is undefined.

       dualvar_ok( SCALAR )
	   Ok if the scalar is a dualvar.

	   How do I test this?

	   sub dualvar_ok ($;$)      {	    my $ok   = Scalar::Util::dualvar( $_[0] );	    my $name = $_[1] || 'Scalar is a dualvar';

		   $Test->ok( $ok, $name );

		   $Test->diag("Expected a dualvar, didn't get it
")
			   unless $ok;
		   }

       greater_than( SCALAR, BOUND )
	   Ok if the SCALAR is numerically greater than BOUND.

       length_ok( SCALAR, LENGTH )
	   Ok if the length of SCALAR is LENGTH.

       less_than( SCALAR, BOUND )
	   Ok if the SCALAR is numerically less than BOUND.

       maxlength_ok( SCALAR, LENGTH )
	   Ok is the length of SCALAR is less than or equal to LENGTH.

       minlength_ok( SCALAR, LENGTH )
	   Ok is the length of SCALAR is greater than or equal to LENGTH.

       number_ok( SCALAR )
	   Ok if the SCALAR is a number ( or a string that represents a number ).

	   At the moment, a number is just a string of digits.	This needs work.

       number_between_ok( SCALAR, LOWER, UPPER )
	   Ok if the number in SCALAR sorts between the number in LOWER and the number in UPPER, numerically.

	   If you put something that isn't a number into UPPER or LOWER, Perl will try to make it into a number and you may get unexpected
	   results.

       string_between_ok( SCALAR, LOWER, UPPER )
	   Ok if the string in SCALAR sorts between the string in LOWER and the string in UPPER, ASCII-betically.

       readonly_ok( SCALAR )
	   Ok is the SCALAR is read-only.

       ref_ok( SCALAR )
	   Ok if the SCALAR is a reference.

       ref_type_ok( REF1, REF2 )
	   Ok if REF1 is the same reference type as REF2.

       strong_ok( SCALAR )
	   Ok is the SCALAR is not a weak reference.

       tainted_ok( SCALAR )
	   Ok is the SCALAR is tainted.

	   (Tainted values may seem like a not-Ok thing, but remember, when you use taint checking, you want Perl to taint data, so you should
	   have a test to make sure it happens.)

       untainted_ok( SCALAR )
	   Ok if the SCALAR is not tainted.

       weak_ok( SCALAR )
	   Ok if the SCALAR is a weak reference.

TO DO

       * add is_a_filehandle test

       * add is_vstring test

SEE ALSO

       Scalar::Util, Test::Data, Test::Data::Array, Test::Data::Function, Test::Data::Hash, Test::Builder

SOURCE AVAILABILITY

       This source is in Github:

	       http://github.com/briandfoy/test-data/tree/master

AUTHOR

       brian d foy, "<bdfoy@cpan.org>"

COPYRIGHT AND LICENSE

       Copyright (c) 2002-2009 brian d foy.  All rights reserved.

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

perl v5.14.2							    2009-02-12							       Scalar(3pm)
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