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Needle in a Haystack: A Nifty Large-scale Text Search Algorithm Tutorial

by Ahmed Alamir

When coming across the term "text search," one usually thinks of a large body of text which is indexed in a way that makes it possible to quickly look up one or more search terms when they are entered by a user. This is a classic problem in computer science to which many solutions exist. But how about a reverse scenario? What if what's available for indexing beforehand is a group of search phrases, and only at runtime is a large body of text presented for searching?

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