‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful!

Learn what the "this" keyword does in JavaScript in 100 seconds. And stay tuned for a few minutes of more advanced discussion after the credits.

In the past two columns, we’ve looked at higher-order functions and talked a little bit about the power of functional programming. So far, the concepts we’ve covered do little to indicate how ...