How can I optimize higher-order functions in JavaScript?

How can I optimize higher-order functions in JavaScript?

To optimize higher-order functions, consider minimizing the number of function calls and using memoization.

What is memoization and how does it help?

Memoization is a technique that stores the results of expensive function calls and returns the cached result when the same inputs occur again.

Can you give me an example of memoization in action?

Sure! Here's a simple example:

const memoizedFibonacci = () => {
    const cache = {};
    return function fib(n) {
        if (n in cache) return cache[n];
        if (n <= 1) return n;
        cache[n] = fib(n - 1) + fib(n - 2);
        return cache[n];
    };
};
const fib = memoizedFibonacci();
console.log(fib(10)); // 55