At its most recent Worldwide Developer Conference (WWDC) event in June, Apple took the lid off something it had been silently cooking for years: Swift, a new programming language in the C family designed to combine the robustness of the Objective-C that iOS and OS X developers were used to with the speed of scripting languages like Python.

With last week’s official launch of OS X Yosemite, developers can now submit apps written in Swift to the App Store. But it’s been hard to find a solid metric for the new language’s popularity, especially given that Apple CEO Tim Cook would rather focus on devices sold and new iPads rather than the number of developers taking a chance on a new programming language. 

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