The main problem is that you would need a totally different indexing system. Roughly, search engines work in two phases: retrieval, and scoring. Retrieval is when you figure out of the billions of documents in the index, which are the top few thousand that could be worthy of being search results. Scoring is when you look at each of those documents in more detail to figure out the actual top ten. Scoring based on regu…
Re: Ask HN:Why there's no Regular Expression search for web?
#11[deleted]