# Learn Basic Algorithmic Thinking by Building a Number Sorter - Step 7

### Tell us what’s happening:

`auto coder is say map should take in dropdown param There has been no step to declare that variable. `

``````const sortInputArray = (event) => {
event.preventDefault();

const inputValues = [...document.getElementsByClassName("values-dropdown")].map(() => {
inputValues.value;
});
}
``````

WARNING

The challenge seed code and/or your solution exceeded the maximum length we can port over from the challenge.

You will need to take an additional step here so the code you wrote presents in an easy to read format.

Please copy/paste all the editor code showing in the challenge from where you just linked.

``````Replace these two sentences with your copied code.
Please leave the ``` line above and the ``` line below,
because they allow your code to properly format in the post.
``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36`

### Challenge Information:

Learn Basic Algorithmic Thinking by Building a Number Sorter - Step 7

you are not declaring a variable here.
The lesson wants you to add a parameter of dropdown to your callback function.

here is another example

here is a list of numbers

``````const numbers = [1,2,3,4]
``````

if I wanted to chain the map method to the numbers array and double their amount, then I can pass in a callback with a parameter of num

``````const numbers = [1, 2, 3, 4].map(num => num * 2);
``````

`num` is the parameter name in that example. You need to do something similar for this challenge.

`inputValues` is an array.

your `map`’s callback function should have a parameter called dropdown and you should implicity return `Number(dropdown.value)`

hope that helps

That is very helpful ! Thankyou

1 Like