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A program to test handling a small part of a huge data set
Handling Huge Data example from a Well House Consultants training course
More on Handling Huge Data [link]

This example is described in the following article(s):
   • How are you getting on? - [link]

Source code: huge1 Module: P667
#!/usr/bin/env perl

# huge1 - a test program to test initial file reading

use site;

@lookfor = @ARGV;

init site("content.rdf"); # run "init" sub in "site" module.

# loop through each available site!
# remember those that look interesting!

while ($current = new site()) { # run "new" sub in "site" module.
        $mtot = 1;
        foreach $keyword(@lookfor) {
                $mtot *= $current -> getmatch($keyword);
        push @got,$current if ($mtot > 1);
        $nsites ++;

        print "$nsites done so far\n" unless ($nsites%1000);

        last if ($nsites > 10000); # test - first 10000 only

# All sites now gotten! Those which did not match have been eliminated
# from $current and so the memory within "site" was released.

foreach $good(@got) {
        $url = $good -> getURL();
        $tit = $good -> getTitle();
        $des = $good -> getDescription();
        print "Have a look at: $url\n$tit\n$des\n\n";

Learn about this subject
This module and example are covered on our public Perl for Larger Projects course. If you have a group of three or more trainees who need to learn the subject, we can also arrange a private or on site course for you.

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Other Examples
This example comes from our "Handling Huge Data" training module. You'll find a description of the topic and some other closely related examples on the "Handling Huge Data" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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