De Bruijn Numerals(text.marvinborner.de)
65 points by marvinborner | 7 comments
65 points by marvinborner | 7 comments
42 points by nill0 | 12 comments
541 points by mariuz | 91 comments
Simon Tatham's long-form essay explaining the XOR operation in boolean logic and on integers, its properties, and applications such as cryptography, graphics, and swaps.