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

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

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## arraySetDifference() function

returns items in A not in B.

**Signature:**

```typescript
export declare function arraySetDifference<TItem>(a: ArrayLike<TItem>, b: ReadonlySet<TItem>): Set<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>

ReadonlySet&lt;TItem&gt;


</td><td>


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

Set&lt;TItem&gt;

## Remarks

See [arraySetDifference()](./rc-js-util.arraysetdifference.md)<!-- -->.