Discussion on: Higher Order Functions in JS

[Lou Cyx]

A few things:

• You should avoid mutations of the native objects prototypes, such as Array. So to any junior reading this: Avoid code like the last example.
• Your examples are mutating output, ideally that output variable should only live inside calculate.
• Your first example of HOC could use some modernization, and it actually doesn't need calculate, you can just use the native Array.prototype.map:

const radiuses = [2, 3, 4, 5, 6, 7];

const area = radius => Math.PI * radius ** 2;
const circumference = radius => Math.PI * diameter(radius);
const diameter = radius => 2 * radius;

console.log(radiuses.map(area));
console.log(radiuses.map(circumference));
console.log(radiuses.map(diameter));

Cheers!

[Umashankar S]

Yes, That is correct. we should not touch the Array prototypes (we should not mutate that).
But Just I'm explaining that how we can create our own functions like maps using the Higher order functions. Yes, we can use the modern arrow functions , instead of normal functions.

Thanks for your suggestions :)