This is tough to do. A while back, I sold off an effort I'd maintained for several years called <a href="http://langpop.com" rel="nofollow">http://langpop.com</a> , which was, IMO, the best effort out there because I looked for a lot of different data sources to utilize including source code, google searches, books, and jobs.<p>One of my conclusions is that there is "popularity" in terms of overall use, and "acceleration" in terms of something gaining popularity quickly. Cobol is probably something in the first category. Ruby, when Rails started to take off, was in the 'accelerating' category.
Where's top 20 business language Cobol? Only 500 questions on Stack Overflow! No-one out there running a portmanteau of handles creating screes of trivial questions and answers to nudge its rank up.<p>And on Github a message that cries opportunity: "It looks like we don't have any trending developers for COBOL. If you create a COBOL repository, you can really own the place. We'd even let it slide if you started calling yourself the mayor."
I was very sad to discover that most of the hits (I only checked one page) for slash on stackoverflow are actually questions involving the slash character (Generally http request parsing)
Great job!<p>You might want to prevent anyone from updating your data and influence the results by applying a document update validation function: <a href="http://docs.couchdb.org/en/latest/ddocs.html#validate-document-update-functions" rel="nofollow">http://docs.couchdb.org/en/latest/ddocs.html#validate-docume...</a>
Very cool, I have wanted to see something like this for a while.<p>This chart would be more useful if the dots were language. Expand the chart out to where the legend is, and drop the legend. (Or move the legend below the chart, and have it as a table with Stackoverflow as one column and Github as another).