Oops, my bad. I did use regular expression first, because I'd be comparing IP address from trap to values in an array in format <ip address>,<server>. So I had used: 
      if ($str =~ /^$var/)

[download]
which didn't work either. I'm already using  use strict; use warnings;. I'm again pasting code that one can run: 
use strict;
use warnings;

my %hashArray;
my $str;
my @bigArray;

# Adding to an array in format <ip,server>
push (@bigArray, "62.40.40.10,ServerOne");
push (@bigArray, "62.40.40.20,ServerTwo");
push (@bigArray, "62.40.40.30,ServerThree");

# Adding to hash
$hashArray{"62.40.40.10"} = "ServerOne";
$hashArray{"62.40.40.20"} = "ServerTwo";
$hashArray{"62.40.40.30"} = "ServerThree";

my ($key, $value, $idx);

foreach $str (@bigArray)
{
    print $str . "\n"; # This prints all values correctly
}

while (($key, $value) = each (%hashArray)) {
    print "$key-$value\n";
}
# above while statement too prints all correctly

my $var = "62.40.40.30";

print "var: $var\n";

## Please note that following part of code (foreach, if 
## exists, while) doesn't work
## It doesn't give any error; simply says no match
foreach $str (@bigArray)
{
    print "$str\n";
    if ($str =~ /^$var/)
    {
      print "IP address matched. Proceed to log trap!\n";
      last;
    }
    else
    {
      print "Match not found.\n";
    }
}
print "After for\n";
if (exists ($hashArray{$var}))
{
    print $var . " exists in hash!\n";
}
while (($key, $value) = each (%hashArray)) 
{
    print "KEY: $key\n";
    if ($key eq $var)
    {
        print "IP Matches!\n";
    }
}

[download]
I hope this helps... Thanks.

In reply to Re^2: Regular expression match in code by truptivk
in thread Regular expression match in code by truptivk

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