rc-js-util/docs/rc-js-util.arraymap.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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## arrayMap() function

Like `Array.map`<!-- -->.

**Signature:**

```typescript
export declare function arrayMap<TItem, TMapped>(items: ArrayLike<TItem>, callback: (item: TItem, index: number) => TMapped): TMapped[];
```

## Parameters

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

Parameter


</th><th>

Type


</th><th>

Description


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

items


</td><td>

ArrayLike&lt;TItem&gt;


</td><td>


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

callback


</td><td>

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


</td><td>


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

TMapped\[\]

## Remarks

Has more consistent performance characteristics cross platform than the built in `Array.map`

See [arrayMap()](./rc-js-util.arraymap.md)<!-- -->.