This is a very simple shopping cart that stores the product ids in a hash table. The keys are the product id and the values are the quantity of that particular product.

To store information between pages we can use the $_SESSION superglobal variable, by using an element of the array like this: $_SESSION['cart'] - this is where our cart will be stored.

Since I first installed Drupal I've had issues with the menu system and breadcrumb trails. Out of the box they don't do what I'd expect them to do.

For those who don't know what a breadcrumb trail is: look above this post - it's the links that show you the path from the home page to the current page (it should say "Home > Blog > Wrestling with Drupal Breadcrumbs"). They allow you to move back to the parent pages of the current page easily.

This project develops a system for detecting plagiarism in sets of student assignments written in Java. Plagiarism is viewed as a form of code obfuscation where students deliberately perform semantics preserving transformations of an original working version to pass it of as their own. In order to detect such obfuscations we assume we have a set of programs in which we attempt to find transformations that have been applied. We investigate tools for static analysis and transformation of Java programs to build a system for plagiarism detection.

Ants are excellent route finders, with the ability to find the shortest path between their nest and a food source, by using pheromone trail clues to organize themselves collectively. By applying behaviour observed in ant colonies to the field of computing, these ant-based techniques can provide a base for network routing algorithms, as well as algorithms to solve graph problems such as the travelling salesman problem.

I took a data mining course during my third year - here's an implementation of the (k-)nearest neighbour algorithm in PHP.

During my third year at Goldsmiths I studied data compression. Here's my implementation of LZW in PHP.