Chapter 3. First-class functions
This chapter covers
- Functions for representing computation
- Functions for events and event-driven I/O
- An introduction to higher-order functions
- Variable scope and closures
If you asked a dozen JavaScript programmers what they thought JavaScript got wrong, you’d probably get a dozen different answers. If you asked those same dozen people what JavaScript got right, they’d probably all answer, “First-class functions.” What does it mean that JavaScript has first-class functions, why does it matter, and how does CoffeeScript make functions even better? All will be answered in good time. First, though, what exactly is a function?
A function defines a transformation of input values called parameters to an output ...
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