Parsing the Bitcoin Genesis Block with J

The genesis block is the first block on the Bitcoin blockchain. Satoshi Nakamoto, the mysterious entity that created Bitcoin, mined the genesis block on January 3, 2009. It's been five years since the genesis block's birth and Satoshi is still unknown, Bitcoin is bigger than ever, and the blockchain is longer than 300,000 blocks and growing. One … Continue reading Parsing the Bitcoin Genesis Block with J

APL Software Archaeology .dbi Edition

Have yourself a merry little APL Christmas. I joke that my job title should be software archaeologist because I often find myself resurrecting, not refactoring, code that dates to primitive and primeval eras. The language I’m typically hired to resurrect is APL. APL, the language with funny symbols, is a software vampire. People keep paying … Continue reading APL Software Archaeology .dbi Edition

JHS with the DHTMLX Grid

Grids are the most important GUI user object. It's hard to think of a user-friendly data munching application that doesn't have a grid beating at its heart. Consequently, any serious GUI interface contender must support grids. My previous post showed how to use MathJax with JHS. MathJax is an impressive and important JavaScript library; it … Continue reading JHS with the DHTMLX Grid

Pandoc based J Syntax Highlighting

John MacFarlane's excellent command line utility Pandoc is a Haskell program that converts to and from various text markup languages. Pandoc's help option lists its supported input and output formats. The following examples are Linux bash shell commands. Windows shell commands are identical. $ pandoc --help pandoc [OPTIONS] [FILES] Input formats: native, json, markdown, markdown+lhs, … Continue reading Pandoc based J Syntax Highlighting