Ask HN: What's the best source code you've read?
Nobody has mentioned Knuth’s corpus of work in Pascal-Web for the TeX ecosystem. This is code written for an era where there wasn’t an ecosystem of libraries for common tasks and even things like being able to access a file in random access order couldn’t be counted on. Even 7-bit ASCII couldn’t be counted on as a given (EBCDIC-based IBM mainframes were a significant element of the computing landscape still).Against all that, Knuth wrote code that could be ported to other systems (I first used TeX on an IBM mainframe running VM/CMS, then later on a VAX minicomputer running VMS, then on a PC with DOS, PC with OS/2, PC with Windows and now a Mac with OS X/MacOS. His presentation of code and internal documentation intermingled is something which I could see still being useful now, although sadly, literate programming seems all but dead now. I still go back to Knuth’s code to understand how to solve some problems on occasion even though it’s about 30 years since I last wrote a line of Pascal.