Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript Array Iteration Methods Combining Array Methods Combining filter() and reduce()

please anyone , give me some help

Using the filter and reduce methods on the purchaseItems array, add the total price of all the groceries (items with a dept. of groceries). Store the total price in the groceryTotal variable. The correct amount can be seen in the comments below.

const purchaseItems = [
        name: 'apples',
        dept: 'groceries',
        price: 2.49
        name: 'bread',
        dept: 'groceries',
        price: 2.99
        name: 'batteries',
        dept: 'electronics',
        price: 5.80
        name: 'eggs',
        dept: 'groceries',
        price: 3.99
        name: 't-shirts',
        dept: 'apparel',
        price: 9.99
let groceryTotal;
groceryTotal = purchaseItems.filter(purchaseItems => purchaseItems.price > 10)
.reduce((sum, purchaseItems) => sum + purchaseItems.price, 0);
// groceryTotal should be: 9.47
// Write your code below

1 Answer

Steven Parker
Steven Parker
221,329 Points

You're pretty close there! But the instructions said, "add the total price of all the groceries (items with a dept. of groceries)"

It looks like your filter is looking for items with a price over 10 (and there are none) instead of items with a dept of "groceries".