In functional programming, there are two varieties of functions: first-order functions and pure functions. First-order functions A first-order function takes standard data types (string, number, ...

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

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 ...