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
It's been a long time since my last post, and it would be appropriate that I post about whatever it is that I've been working on. But I won't. I'm writing this post only to tell you about an interesting new python library I stumbled... View Article
For a long time now, I've been hindered by the issue of utilities, or snippets. These are convenience functions and classes that are too small or too incomplete to justify a library, yet are useful enough to be used. I've posted a few on my... View Article
In my previous post I introduced FileDict. I did my best to get it right the first time, but as we all know, this is impossible for any non-trivial piece of code. I want to thank everyone for their comments and remarks. It's been very... View Article
The result is a dictionary which at all-times exists as a file, has virtually no size limit, and can be accessed by several processes concurrently.
My last post introduced the concept of X, a class which "absorbs" operations and behaves like a function. As many people pointed out, this was merely a syntactic alternative to lambda. You may like it, you may not. Now, after a rewrite, X can now... View Article
Readers, meet X. X is a class I wrote in Python as an alternative to using lambda. It has two main features: It acts as an identity function ( so X(3) == 3, etc. ) When performing operations on it, it returns a new class... View Article
Taking a short break from my artwork craze (but I promise more is to come), I reviewed some of the new features and changes in Python, brought by versions 2.6 and 3.0. There are many interesting features, but a very specific one caught my eye:... View Article