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Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Regular Expression Matching: the Virtual Machine Approach

From: andrew cooke <andrew@...>

Date: Thu, 10 Dec 2009 18:20:00 -0300 

This is a good summary of how to implement regexps.  It differs from
LEPL in that it doesn't compile to a state machine, but instead uses a
VM.  Perhaps as a result it wasn't clear to me what the difference was
between DFA and NFAs.  However, the ease with which it can be extended
illustrates the advantage of the approach (perhaps at a cost in
efficiency?).

http://swtch.com/~rsc/regexp/regexp2.html

Andrew

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