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Guess what programming language grew most in popularity in 2010?

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TIOBE Software published its annual TIOBE Programming Community Index. The ranks are led by the usual suspects Java, C, C++, and PHP. But the language that grew most in popularity in 2010 was a bit of a surprise:
Python. Also surprising: JavaScript’s popularity declined. With Node and webapps spreading, I expect that trend to reverse this year. The index is computed as follows (detailed definition).

The TIOBE Programming Community index is an indicator of the popularity of programming languages. The index is updated once a month. The ratings are based on the number of skilled engineers world-wide, courses and third party vendors. The popular search engines Google, MSN, Yahoo!, Wikipedia and YouTube are used to calculate the ratings. Observe that the TIOBE index is not about the best programming language or the language in which most lines of code have been written.
  • Note that I’m not surprised about people liking Python (I’m a fan myself), I’m surprised about it being in such professional demand.
  • TIOBE does not have a very good reputation: ‘TIOBE or not TIOBE – “Lies, damned lies, and statistics”’. [Source: mr_chromatic]
  • Armin Ehrenreich proposes to take a look at jobtrends (yes, the commas in the query are necessary) to get a more reliable measure of how popular programming languages are. And behold: JavaScript is growing, not declining.
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