Photograph: Julian Chokkattu
Android’s toolkit, Activities, Views, and Fragments
，这一点在PDF资料中也有详细论述
\(f\) is continuous (preimages of open sets are open),
But we've learned a lot since then. JavaScript has evolved. A streaming API designed today can be simpler, more aligned with the language, and more explicit about the things that matter — like backpressure and multi-consumer behavior.