rc-js-util/docs/rc-js-util.arrayintersect.md

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [rc-js-util](./rc-js-util.md) &gt; [arrayIntersect](./rc-js-util.arrayintersect.md)

## arrayIntersect() function

Given two `ArrayLike`<!-- -->, provides the items common between them in an `Array`<!-- -->.

**Signature:**

```typescript
export declare function arrayIntersect<TItem>(a: ArrayLike<TItem>, b: ArrayLike<TItem>, getComparisonValue?: (item: TItem, index: number) => unknown): TItem[];
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

a


</td><td>

ArrayLike&lt;TItem&gt;


</td><td>


</td></tr>
<tr><td>

b


</td><td>

ArrayLike&lt;TItem&gt;


</td><td>


</td></tr>
<tr><td>

getComparisonValue


</td><td>

(item: TItem, index: number) =&gt; unknown


</td><td>

_(Optional)_


</td></tr>
</tbody></table>
**Returns:**

TItem\[\]

## Remarks

See [arrayIntersect()](./rc-js-util.arrayintersect.md)<!-- -->.