04-24-2008
comparing content of 2 variables in script
hello
how can i compare the content of two variables using the if or for loops.
I have 2 variables which was formed as result of commands pass into them but i want to now compare the 2 contents and echo where their is a match
for examples
variable1=`cat file2`
variable2=`cat file3`
if [ `$variable1` = `$variable2` ] # looking for content match of strings
then
echo "variable1"
else
echo " no match found"
fi
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LEARN ABOUT DEBIAN
perl::critic::policy::variables::requirelocalizedpunctuationvars
Perl::Critic::Policy::Variables::RequireLocalizedPunctuaUserVContributed PerlPerl::Critic::Policy::Variables::RequireLocalizedPunctuationVars(3pm)
NAME
Perl::Critic::Policy::Variables::RequireLocalizedPunctuationVars - Magic variables should be assigned as "local".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Punctuation variables (and their English.pm equivalents) are global variables. Messing with globals is dangerous in a complex program as
it can lead to very subtle and hard to fix bugs. If you must change a magic variable in a non-trivial program, do it in a local scope.
For example, to slurp a filehandle into a scalar, it's common to set the record separator to undef instead of a newline. If you choose to
do this (instead of using File::Slurp!) then be sure to localize the global and change it for as short a time as possible.
# BAD:
$/ = undef;
my $content = <$fh>;
# BETTER:
my $content;
{
local $/ = undef;
$content = <$fh>;
}
# A popular idiom:
my $content = do { local $/ = undef; <$fh> };
This policy also allows the use of "my". Perl prevents using "my" with "proper" punctuation variables, but allows $a, @ARGV, the names
declared by English, etc. This is not a good coding practice, however it is not the concern of this specific policy to complain about
that.
There are exemptions for $_ and @_, and the English equivalent $ARG.
CONFIGURATION
You can configure your own exemptions using the "allow" option:
[Variables::RequireLocalizedPunctuationVars]
allow = @ARGV $ARGV
These are added to the default exemptions.
CREDITS
Initial development of this policy was supported by a grant from the Perl Foundation.
AUTHOR
Chris Dolan <cdolan@cpan.org>
COPYRIGHT
Copyright (c) 2007-2011 Chris Dolan. Many rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.14.2 2012-06-0Perl::Critic::Policy::Variables::RequireLocalizedPunctuationVars(3pm)