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How to Compare Null values??
Post 302317236 by Yagami on Monday 18th of May 2009 11:05:30 AM
05-18-2009
How to Compare Null values??
Hi,
Can someone help me comparing Null values.
Scenario is as follows:
I have a variable which "cache_prd" which can have either some integer or nothing(Null)
if it is integer I have to again do some comparision but these comparisons give me this error
"line 32: [: 95: unary operator expected"
To avoid this I used another variable chk= which has null value in it but again at some point when integer comes in variable it gives me same error.
Please suggest me how to catch this error.
Thanks in advance,
Yagami
Can someone help me comparing Null values.
Scenario is as follows:
I have a variable which "cache_prd" which can have either some integer or nothing(Null)
if it is integer I have to again do some comparision but these comparisons give me this error
"line 32: [: 95: unary operator expected"To avoid this I used another variable chk= which has null value in it but again at some point when integer comes in variable it gives me same error.
Please suggest me how to catch this error.
Thanks in advance,
Yagami
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LEARN ABOUT CENTOS
ppi::statement::null
PPI::Statement::Null(3) User Contributed Perl Documentation PPI::Statement::Null(3) NAME
PPI::Statement::Null - A useless null statement SYNOPSIS
my $foo = 1; ; # <-- Null statement my $bar = 1; INHERITANCE
PPI::Statement::Null isa PPI::Statement isa PPI::Node isa PPI::Element DESCRIPTION
"PPI::Statement::Null" is a utility class designed to handle situations where PPI encounters a naked statement separator. Although strictly speaking, the semicolon is a statement separator and not a statement terminator, PPI considers a semicolon to be a statement terminator under most circumstances. In any case, the null statement has no purpose, and can be safely deleted with no ill effect. METHODS
"PPI::Statement::Null" has no additional methods beyond the default ones provided by PPI::Statement, PPI::Node and PPI::Element. SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.16.3 2011-02-26 PPI::Statement::Null(3)