[TUHS] Short history of 'grep'
dave at horsfall.org
Sat Mar 5 11:48:19 AEST 2016
On Sun, 31 Jan 2016, Doug McIlroy wrote:
> That's the short story. In real life egrep overcomes the exponential by
> lazily constructing the machine--not generating a state until it is
> encountered in the parse, so no more than n states get constructed. It's
> a complex program, though, for the already fancy preprocessing must be
> interleaved with the parsing.
Many thanks; I think I understand a little better now... It's been many
years since I majored in Computer Science :-)
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."
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