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    copied!<p>I ended up using the String.scan approach, the only tricky point there was figuring out that this returns an array of arrays, not a MatchData object, so there was some initial confusion on my part, mostly due to my ruby green-ness, but it's working as expected now. Also, I trimmed the regex per Trevoke's suggestion. But snake case? Never...;-) Anyway, here goes:</p> <pre><code>tagRegex = /(&lt;(?:webobject) (?:name)=(?:\w+\.)+(?:\w+)(?:&gt;))/i testFile = File.open('RegexTestingCompFix.txt', "r+") lineCount=0 testFile.each do |htmlLine| lineCount += 1 puts ("Current line: #{htmlLine} at line num: #{lineCount}") oldMatches = htmlLine.scan(tagRegex) #oldMatches thusly named due to not explicitly using Regexp or MatchData, as in "the old way..." if(oldMatches.size &gt; 0) oldMatches.each_index do |index| arrayMatch = oldMatches[index] aMatch = arrayMatch[0] #create a new regex using the match results; make sure to use auto escape method replacementRegex = Regexp.new(Regexp.escape(aMatch)) #replace any periods with underscores in a copy of lineMatchCapture periodToUnderscoreCorrection = aMatch.gsub(/\./, '_') #replace original match with underscore replaced copy within line, matching against the new escaped literal regex htmlLine.gsub!(replacementRegex, periodToUnderscoreCorrection) puts "The modified htmlLine is now: #{htmlLine}" end # I kind of still prefer the brackets...;-) end end </code></pre> <p>Now, why does MatchData work the way it does? It seems like it's behavior is a bug really, and certainly not very useful in general if you can't get it provide a simple means of accessing all the matches. Just my $.02</p>
 

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