Can we use variable as a function?

Question

I'm learning Destructuring Assignment in JS and encountered this code which I don't understand.
Isn’t half a variable, why could we use it as a function and pass an argument in console.log?
What would it look like if we write the same code in a basic way?
Thank you!

const stats = {
 max: 56.78,
 min: -0.75
};

const half = ({max,min}) => (max+min)/2.0;

console.log(half(stats));

const stats = {
  max: 56.78,
  min: -0.75
};

const half = ({max,min}) => (max+min)/2.0;

console.log(half(stats));

Answer 1

JavaScript allows you to use function definition and function assignment.

function myFunction() {}

On top of this, you can also assign your function to another variable (like an alias)

const myAlias = myFunction

You can also define this all in one line

const myAlias = function myFunction() {}

Since you would like to re-assign / rename your function, you can define an anonymous function (omit the function name) and assign it to a variable

const myAlias = () => {}