I have used array.filter before. But I just started so would someone please explain this kata and the solution for those new to programming?
I would like to learn something from this but the solutions are not clear to me.

I am sure that link answers my question...somewhere?

Nevertheless, I appreciate the reply. Sorry about posting in the wrong area.

I hope that this is the correct place to ask. If not, I am sorry for the hassle. On the 8 Kyu kata "Sum of positive," you are to get an array of numbers and return the sum of all of the positive ones. I tried this:

function positiveSum(arr) {
return arr.filter(e => e > 0).reduce((a, b) => a + b);
}

It worked using node in VS Code, but in Codewars, I received a TypeError.

Could someone please tell me what I have done wrong?