R, the master troll of statistical languages (2012)
The problem is people using R without trying to learn about the language itself, just assuming it works like their favourite language.<p>For example complaining that R is slow and then writing iterative solution instead of using vectorization. When I saw the example the author gave my first thought was "sapply/lapply". Lapply is essential to the R use, and is being taught early on in every book/course on R I've ever saw.<p>"In 2012, I’m the kind of person who uses apply() a dozen times a day, and is vaguely aware that R has a million related built-in functions like sapply(), tapply(), lapply(), and vapply(), yet still has absolutely no idea what all of those actually do. "