Learn Advanced Array Methods by Building a Statistics Calculator - Step 7

JavaScript
1

Tell us what’s happening:

Hello, I’ve just solved this step, but I think I should point out that isNaN() is mentioned in this step to be a method, but another post on this step called it a “special function”.
I won’t post the solution, but using isNaN() as if it was a method, something like…

/* file: script.js */

// User Editable Region

const calculate = () => {
  const value = document.querySelector("#numbers").value;
  const array = value.split(/,\s*/g);
  const numbers = array.map(el => Number(el));
  const filtered = numbers.filter(el => !el.isNaN()); //wrong syntax
}

// User Editable Region

…resulted in an error. Should this be clarified?

Here is the post in question…

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

3

isNaN() - JavaScript | MDN

Check the syntax. You got an error because you did not use it correctly.

4

there are both a function, isNaN() and a method Number.isNaN()