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Updates to the index section #321

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6 changes: 3 additions & 3 deletions lessons/full-stack-build-an-app-stars/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -38,11 +38,11 @@ Then we update the display of stars:

However, if we visit a restaurant without any reviews, we will notice that we
don't see any stars! We don't see this because `restaurant.reviews.length` is
`0` and thus `averageStars` becomes `NaN`
`0`, and thus `averageStars` becomes `NaN`.

We can solve this one of two ways.

The first is to realize that `NaN` is a _false-like_ value and thus we can
The first is to realize that `NaN` is a _false-like_ value, and thus we can
rewrite the line as:

```javascript
Expand All @@ -59,7 +59,7 @@ const averageStars =
In this style, we compare the length of the review array, and if it is zero, we
set the `averageStars` to `0`, otherwise setting it equal to the average.

We can do this same change in `SingleRestaurantFromList.tsx`
We can do this same change in `SingleRestaurantFromList.tsx`.

```javascript
const totalStars = restaurant.reviews.reduce(
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