How do I create higher-order functions in JavaScript?

What are higher-order functions in JavaScript?

Higher-order functions are functions that can take other functions as arguments or return them as results.

Can you give me an example of a higher-order function?

Sure! A common example is the map function, which takes a function and applies it to each element in an array.

How do I create my own higher-order function?

To create a higher-order function, define a function that accepts another function as a parameter and returns a new function.

Can you show me a code example?

Absolutely! Here's a simple example:

function myHigherOrderFunction(callback) {
    return function(value) {
        return callback(value);
    };
}

const double = myHigherOrderFunction(x => x * 2);
console.log(double(5)); // Outputs: 10