Search terms
Finding the right answer fast, at any scale
Search is a deceptively complex problem — users expect instant, relevant results across massive datasets. This category covers inverted indexes, relevance ranking, full-text search, fuzzy matching, faceted search, vector similarity search, and the architectures behind search engines like Elasticsearch and Typesense. Building good search is part engineering, part information retrieval science.
TF-IDF
Term Frequency–Inverse Document Frequency — a relevance scoring formula that ranks documents higher when a query term appears frequently in them but rarely across the whole collection.
2mo ago
search intermediate
Typeahead & Autocomplete PHP 7.0+
Search suggestions shown as the user types — requiring prefix matching, typo tolerance, and sub-100ms response times to feel native, implemented via dedicated index structures or edge completion APIs.
2mo ago
search intermediate