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

Kaitlyn Dodds
Kaitlyn Dodds
32,545 Points
Posted by Kaitlyn Dodds
Kaitlyn Dodds
32,545 Points

Not sure this code challenge is working correctly.

Get the error, 'Both the 'reduce' and 'filter' methods have not been called yet' despite running what should be a working solution.

I have copied and pasted my code into a text editor and run it. I get no errors and the correct solution, 9.47.

I have included my code snippet below:

groceryTotal = purchaseItems.filter(item => item.dept === 'groceries') .reduce((total, item) => total += item.price, 0).toFixed(2);

app.js 
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 should be: 9.47
// Write your code below
groceryTotal = purchaseItems.filter(item => item.dept === 'groceries')
                            .reduce((total, item) => total += item.price, 0).toFixed(2);

1 Answer