== Another Russ Cox regexp article: How Google Code Search Worked

Russ Cox has just added another article in [[his series on regular
expressions RussCoxRegexpArticles]]; this one is titled [[Regular
Expression Matching with a Trigram Index, or How Google Code Search
Worked http://swtch.com/~rsc/regexp/regexp4.html]]. It's as worthwhile
as all of [[the previous three RussCoxRegexpArticles]].