#Cs

1,251 classes have been replaced with Microsoft’s open sourced ones

Miguel de Icaza

If you have twice contravariant, it becomes covariant. But if you have twice covariant, it doesn’t become contravariant… And then there’s these two guys that make it even harder, with <? extends> and <? super> in Java. If you look at cubicles all across America, they are plastered with brains.

Erik Meijer, Duality and the End of Reactive Programming, Lang.NEXT, San Francisco, 2014