Higher Order Functions
A higher order function is a function that takes a function as an argument, or returns a function. They are commonly used in functional programming, and are a powerful tool for abstracting away complexity.
// A function that takes a function as an argument
function add(x, y) {
return x + y;
}
function subtract(x, y) {
return x - y;
}
function math(x, y, operator) {
return operator(x, y);
}
math(5, 2, add); // 7