print "yeah\n" if $method2->($a,$b,$c,$d);
[download]

in some scope where $c and $c aren't previously declared. Declare them with my.

In case you wonder why $a and $b are missing from perl's complaint: Those variables are special. They are used in sort functions, so they exist anyways. It is discouraged to use them for any other purpose. See perlvar.

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

Thanks. I was just trying the following simple way:

my $aa=1,$bb=1,$cc=1,$dd=1;
my $method1 = '(($aa && $bb)) || ($cc && $dd)';
print "yeah\n" if eval $method1; die $@ if $@;
[download]

But it still keeps giving me the same bunch of errors. Am I doing something wrong here?

Am I doing something wrong here?

Yes. ETOOLAZY:

my $aa=1,$bb=1,$cc=1,$dd=1;
[download]

That's equivalent to

my $aa=1;
$bb=1;
$cc=1;
$dd=1;
[download]

Only $aa is declared as lexical. Even parens don't work, since you can't declare an assignment - you declare variables.

But that's lazy enough:

my ($aa, $bb, $cc, $dd);
$aa = $bb = $cc = $dd = 1;
[download]

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

Thanks... Its working now... I would like to go with the first method but could you show me how to execute multiple statements using it?

If you have a small number of different conditions, you may wish to use a dispatch table.

use strict;
use warnings;

my %condition = (
  '(A&B)|(C&D)' => sub {
        my ($aa, $bb, $cc, $dd) = @_;
        return ($aa && $bb ) || ($cc && $dd );
  },
  'A|(B&C&D)' => sub {
        my ($aa, $bb, $cc, $dd) = @_;
        return $aa || ($bb && $cc && $dd );         
  }
);

my @flags = qw( 0 1 1 1 );

my @conditions_to_check = (
    'A|(B&C&D)', 
    'FOO', 
    '(A&B)|(C&D)' 
 );

for my $cond_name ( @conditions_to_check ) {
    
    if( exists $condition{$cond_name} ) {
        
        if ( $condition{$cond_name} ->(@flags) ) {
            print "Condition '$cond_name' is true\n" 
        }
        else {
            print "Condition '$cond_name' is false\n" 
        }
    }
    else {
        print "Condition '$cond_name' is not defined\n";
    }
}

__DATA__
Condition 'A|(B&C&D)' is true
Condition 'FOO' is not defined
Condition '(A&B)|(C&D)' is true
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TGI says moo

Stuff the expressions into an array and run a for() loop with that? But I'm beginning to suspect an XY problem here. What's X?

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

Maybe you could write them out to a file and run perl on it.

-Paul