The first time I used Logo, it felt like magic. I could type a short sequence of simple commands, and draw beautifully complex shapes on the screen. In this tutorial, I will show you how to parse and interpret a Logo-like language in just 70... View Article
Three months ago, I wrote a post detailing the process of writing a calculator using a parsing library. The popular response, however, was that readers are far more curious about seeing a calculator written from scratch, with the batteries included but nothing else. I figured, why... View Article
Introduction In this post I will demonstrate how to parse and calculate an arithmetic expression a general-purpose parser. When we're done, we'll be able to handle expressions such as 1 + 2 * -(-3+2)/5.6 + 3, and hopefully you'll have gained the tools to handle... View Article
Continuing that post. Before I go on, I wish to make 2 corrections to the code provided in the last post: I think that the grammar for COMMENT is incorrect (in the original too). It requires comments to always end with a new-line. I changed... View Article
For a while now, I've been writing a code editor for Python. I know there are quite enough of these, but I wanted something a bit different. I decided to write it in C#, and I'm glad I did - C#'s GUI is really easy... View Article