The Joy of JavaScript

9 Streams programming

This chapter covers

• Reviewing the Iterator/Iterable protocols
• Using generators to represent iterable sequences of values over time
• Reviewing the push/pull models as well as stream-based programming
• Using observables to create declarative, asynchronous push streams

An Observable is a function that takes an observer and returns a function. Nothing more, nothing less. If you write a function that takes an observer and returns a function, is it async or sync? Neither. It’s a function.

—Ben Lesh

This last chapter brings together the most important techniques covered in this book, including composable software as a whole, functional programming, mixin extensions, and reflective and asynchronous programming. Here, you’ll learn ...