Miscellaneous Code Resources

Ciphers & Crypto • Screen Robots • Algorithms • iTunes Visualizers • Miscellany

Licensing

The code on these pages has been posted in the hopes that someone will find it neat or useful. You may use it freely with the following caveats:

• Students, please do not attempt to turn any code from these pages in to your professor as part of a homework solution. Not only is it unethical to do so, and unhelpful to your education, they are well indexed by Google and you will get caught.
• If these pages have brought you any use or enjoyment, a thank you note would be appreciated. My contact info is available from the navigation menu.
• Some things may be broken or wrong. I'm not liable for anything this code does. Use at your own risk.

Ciphers & Crypto

• A5/1 Stream Cipher (Python)
• Atbash Cipher (Python, Preserves non-Latin-alphabet characters)
• Feistel Cipher (Python, Generates explicit formula for round N in terms R0, L0, & K)
• Vigenère Cipher (Python, Uses full ASCII character set as alphabet & a hexadecimal representation for output)
• Petra's Lucky Dragon Cipher (Python, Reverse engineered from Orson Scott Card's "Shadow of the Hegemon")
• Wordstat (Python, Analyzes character frequency in a text, as well as common digraphs and trigraphs)

Screen Robots

• Annoy-o-click (Java, Generates random mouse activity for a while, and finishes with the key-sequence to launch a Task Manager in Windows)
• TwistHax (Java, Cheats at the popular game TextTwist by systematically trying all permutations of letters — you'll get bored before you break any highscore records)

Cute Algorithm Implementations

• Batcher's Bitonic Sort (Python)
• Cute one-liner to calculate width of a BST (Java, Have fun reformatting it)
• NextFit and BestFit allocators schemes (Python)
• FIFO, LRU, and Opt paging schemes (Python)
• Cute one-liner for a perfect shuffle (Python)
• Analysis of varying algorithms to search a rectangular array with certain properties (Python)
• Analysis of some easily implemented set-intersection algorithms (Python)

iTunes Visualizers (made with Quartz Composer)

(You might need to right click and "Save As" instead of just clicking on the link)

• "ThomViz" - a cool bouncing dots visualizer that works well with thumping bass
• "TVBlack" - ThomViz, but with a solid black background instead of a gradient

Miscellaneous Miscellany

• Archive.org Site Backup Tool (Python, Reconstructs as much of a website as possible based on archive.org snapshots)
• Function Evaluation (Python, Turns user-input into a callable function — totally insecure, do not use with untrusted inputs)
• Gallery Generating Tool (Python, Turns a directory of images and an HTML template into a static thumbnailed gallery — requires PIL)
• IOCCC Sourcecode Check (Python, Counts characters based on 2012 IOCCC rules)
• Roman Numerals (Python, Attempts to convert Roman Numeral strings into integer values)
• Illustration of the Romney Tax Plan (Maple, "In which we learn that the math adds up, but the real world assumptions may not")

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