HI Monks, I wanted to pass differnt hashes to a sub routine at differnt times is it possible to do this way ? 
{
my %MSISDN=();

#populate the subscription list to hash MSISDN

        open(FILE,"/tmp/subscription_list") || die "Unable to open sub
+scription file";
        sub file_merge(\%MSISDN);
        close(FILE);

my  %Calls=();

#populate the usage types to hash Calls

       open(FILE1,"/tmp/Call_Det")|| die "Unable to open call_details 
+file";
       sub file_merge(\%Calls);
       close(FILE1);
}

sub file_merge(%hash_ref)
{
while (<>) {
  chomp;
  my ($key, @values) = split /-/, $_;
  push @{$hash_ref{$key}}, [ @values ];
}

}

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In reply to hash as subroutine argument by Anonymous Monk

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