Re: Needs help with Matching Logic

From: Paul Lalli (mritty_at_gmail.com)
Date: 07/20/04 

Date: Tue, 20 Jul 2004 11:48:14 -0400

On Tue, 20 Jul 2004, Kishore wrote:

> I am comparitively a newbie in Perl.
> I am working a logic to display the snippets matched results of a
> 'keyword' from a text file just like google would do in the search
> results.
>
> I have the content of the text file in the variable $file_content.
> And I have the 'keyword' in $keyword.
>
> I need to get the string like google does when displaying the search
> results..
> When I match the $keyword in the $file_content, I want to also pull 5
> words before and 5 words after so I can show that snippet of the file
> where the matching of the keyword occurs.
>
> I searched in the google groups for a few days, but couldn't find
> anything to help me.
>
> I really appreciate any help I can get.

how about something like:

m/((?:\S+\s+){0,5})($keyword)((?:\s+\S+){0,5})/

Using that, $1 is the series of up to five words before the match, $2 is
the match, and $3 is the series of up to five words after the match.

It'd probably have to be tweaked a bit to get exactly what you want, but
it should at least give you a starting point.

Paul Lalli

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