Friday, October 23, 2015

Re: How to extract information from large file based on search pattern

LCD 47 wrote:
> The easy way:
>
> fgrep -wf small_file.txt big_file.txt
>
I'd like to expand a bit on what LCD mentioned: fgrep will build a
finite state automaton to do the matching as if it was running all the
matching in parallel; it will find matches with one pass, no backing up,
through the large text file. In other words, it'll be fast.

Regards,
Chip Campbell

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