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# `whereIn()`
The whereIn method filters the collection by a given key / value contained within the given array.
```js
const collection = collect([
{ product: 'Desk', price: 200 },
{ product: 'Chair', price: 100 },
{ product: 'Bookcase', price: 150 },
{ product: 'Door', price: 100 },
]);
const filtered = collection.whereIn('price', [100, 150]);
filtered.all();
// [
// { product: 'Chair', price: 100 },
// { product: 'Bookcase', price: 150 },
// { product: 'Door', price: 100 },
// ]
```
> When working with nested objects `whereIn()` method allows dot notated keys. E.g. `whereIn('product.categories', ['office-supplies', 'furniture'])`
[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/whereIn.js)