rc-js-util/docs/rc-js-util._array.index.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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[Home](./index.md) &gt; [rc-js-util](./rc-js-util.md) &gt; [\_Array](./rc-js-util._array.md) &gt; [index](./rc-js-util._array.index.md)

## \_Array.index property

Populates a `Map` given a key creating function and `ArrayLike`<!-- -->.

**Signature:**

```typescript
static readonly index: typeof arrayIndex;
```

## Remarks

keys which are null are omitted.

See [arrayIndex()](./rc-js-util.arrayindex.md)<!-- -->.