Return match position in String.scan

I need to scan larger text documents for patterns expressed in regular expressions and extrac开发者_StackOverflow社区t a certain number of surrounding text tokens. At the moment I use String.scan to retrieve the matches, but this doesn't give me the position of the matched string in the document. Is there some elegant solution for this?

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Check out this post.

It works on a match object. m.begin(1)