I should replace it with how to do it in a language I actually like working with one of these days... and generally improve it because its missing all sorts of niceties such as skip lists on the posting lists, binary formats for saving things.
I also noticed all the code is missing as a result of the conversation from Wordpress to Hugo... fixing that now.
EDIT - fixed, but might need a refresh from anyone who visited it.
Using what you built, now you're finally exposed to just how many things you can get wrong. It's humbling how much work and love goes into everything.
in the age of computing, if you understand a concept well, you can simulate it.