Rather than using regexs for this job, I'd recommend to use Text::CSV or Text::CSV_XS to parse the lines of the file into a list and simply add the tags on an element by element basis.

IMHO this is a cleaner approach from a software engineering point of view, but more importantly you're sure that CSV will be handled correctly in all cases.

Hope this helps, -gjb-

In reply to Re: newbie regex question: substituting repeating occurences for different replacements by gjb
in thread newbie regex question: substituting repeating occurences for different replacements by RuyLopez

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