First-order functions A first-order function takes standard data types (string, number, boolean, array, object) as parameters and returns any of these standard data types too. Also, a first-order ...

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

Passing Multiple Parameters In all these examples I've been passing only a single parameter to my functions and methods. However, it is possible to pass multiple parameters. When passing parameters ...