Friends,

My script uses way too much memory. I haven't ever use tie before. So I thought I could use Tie::File to store my data to disk rather than memory. Here's what I tried to do ...

#!/usr/local/bin/perl -w
use strict;
use Data::Dumper;
use Tie::File;
use lib('.');

use board;
use hole;
use boardTree;

#
# create the holes
#
my $holeLevel = 0;
my @holes;
for my $i (0..15){
    $holeLevel = 1 if $i >0;
    $holeLevel = 2 if $i >2;
    $holeLevel = 3 if $i >5;
    $holeLevel = 4 if $i >9;
    push ( @holes, new hole( 'white', $i, $holeLevel, undef ) );
}
#
# link the holes
#
$holes[0]->setLinks(  [ $holes[1], $holes[2] ] );
$holes[1]->setLinks(  [ $holes[0], $holes[2], $holes[3], $holes[4] ] )
+;
$holes[2]->setLinks(  [ $holes[0], $holes[1], $holes[4], $holes[5] ] )
+;
$holes[3]->setLinks(  [ $holes[1], $holes[4], $holes[6], $holes[7] ] )
+;
$holes[4]->setLinks(  [ $holes[1], $holes[2], $holes[3], $holes[5], $h
+oles[7], $holes[8] ] );
$holes[5]->setLinks(  [ $holes[2], $holes[4], $holes[8], $holes[9] ] )
+;
$holes[6]->setLinks(  [ $holes[3], $holes[7], $holes[10], $holes[11] ]
+ );
$holes[7]->setLinks(  [ $holes[3], $holes[4], $holes[6], $holes[8], $h
+oles[11], $holes[12] ] );
$holes[8]->setLinks(  [ $holes[4], $holes[5], $holes[7], $holes[9], $h
+oles[12], $holes[13] ] );
$holes[9]->setLinks(  [ $holes[5], $holes[8], $holes[13], $holes[14] ]
+ );
$holes[10]->setLinks( [ $holes[6], $holes[11] ] );
$holes[11]->setLinks( [ $holes[6], $holes[7], $holes[10], $holes[12] ]
+ );
$holes[12]->setLinks( [ $holes[7], $holes[8], $holes[11], $holes[13] ]
+ );
$holes[13]->setLinks( [ $holes[8], $holes[9], $holes[12], $holes[14] ]
+ );
$holes[14]->setLinks( [ $holes[9], $holes[13] ] );

my $BT = new boardTree ( new board( \@holes, 0 ), 1, 1, [ new boardTre
+e( new board ( undef, 1 ), 1, 1, [] ) ] );

#
# lets try tie the boardTree object to a file
#
tie $BT, 'Tie::File', "thetiefile";

# I am guess that the script is dying because
# this will use up too much virtual memory and 
# the OS (Window XP) kills the script.
$BT->{'links'}[0]->makeLinks();
# I never get here because of memory issue
$BT->dumpPretty();
[download]

... here's the output I get ...

$ ./tieBoardTree.pl
Can't locate object method "TIESCALAR" via package "Tie::File" at
        ./tieBoardTree.pl line 47 (#1)
    (F) You called a method correctly, and it correctly indicated a pa
+ckage
    functioning as a class, but that package doesn't define that parti
+cular
    method, nor does any of its base classes.  See perlobj.
    
Uncaught exception from user code:
        Can't locate object method "TIESCALAR" via package "Tie::File"
+ at ./tieBoardTree.pl line 47.
[download]

Like I said I have never used tie before. Maybe tie is completely the wrong thing to use here. If so what should I do?

edit (broquaint): changed <pre> tags to <code>

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.