Hi Monks, I was trying to write a code to get the minimum and maximum value in a given field. The code doesn't seem to work fine when I run it on large files and it multiplies the file size and adds unwanted records. I can get the output correctly for this example but it words faulty on large files. Please help me to correct the code. I get the correct output for this example:- Output:- Books    6    159290954    159331385    +    Author
Here is my full code with example:- 
#!/usr/bin/perl

open(FH, $ARGV[0]) || die("Cannot open:$!");

while (<FH>) {
   ($Query, $Score, $Start, $End, $one, $two) = split;

   if ( ! exists ( $hash{$Query} ) ) {
      $hash{$Query}[0] = $Score;
      $hash{$Query}[1] = $Start;
      $hash{$Query}[2] = $End;
      $hash{$Query}[3] = $one;
      $hash{$Query}[4] = $two;
   }
   else {
      if ( $hash{$Query}[1] > $Start ) {
           $hash{$Query}[0] = $Score;
           $hash{$Query}[1] = $Start;
           $hash{$Query}[2] = $End;
           $hash{$Query}[3] = $one;
           $hash{$Query}[4] = $two;
      }
   }
   if ( ! exists ( $hash2{$Query} ) ) {
      $hash2{$Query}[0] = $Score;
      $hash2{$Query}[1] = $Start;
      $hash2{$Query}[2] = $End;
      $hash{$Query}[3] = $one;
      $hash{$Query}[4] = $two;
   }
   else {
      if ( $hash2{$Query}[2] < $End ) {
           $hash2{$Query}[0] = $Score;
           $hash2{$Query}[1] = $Start;
           $hash2{$Query}[2] = $End;
           $hash{$Query}[3] = $one;
           $hash{$Query}[4] = $two;
      }
   }
}

foreach $Query ( keys (%hash) ) {
foreach $Query ( keys (%hash2) ) {
   print "$Query\t$hash{$Query}[0]\t$hash{$Query}[1]\t$hash2{$Query}[2
+]\t$hash{$Query}[3]\t$hash{$Query}[4]\n";
}
}
close(FH);
__DATA__
Books    6    159290954    159291342    +     Author
Books    6    159294558    159294653    +     Author
Books    6    159316253    159316398    +     Author
Books    6    159330999    159331385    +     Author
Books    6    159290971    159290997    +     Author
Books    6    159316253    159316398    +     Author
Books    6    159330999    159331289    +     Author
Books    6    159316268    159316398    +     Author
Books    6    159330999    159331245    +     Author

[download]
Thanks in advance

In reply to Parsing and Finding Max Min by Perl_Crazy

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