*if you include word2vec. Chris and I spent a couple hours the other day creating a search engine for my blog from “scratch”. Mostly he walked me through it because I only vaguely knew what word2vec was before this experiment. The search engine we made is built on word embeddings. This refers to some function that takes a word and maps it onto N-dimensional space (in this case, N=300) where each dimension vaguely corresponds to some axis of meaning. Word2vec from Scratch is a nice blog post that...