[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Lookup](https://evolu.dev/docs/api-reference/common/Lookup) › CreateLookupMapOptions

Defined in: [packages/common/src/Lookup.ts:75](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Lookup.ts#L75)

Options for [createLookupMap](https://evolu.dev/docs/api-reference/common/Lookup/functions/createLookupMap).

## Extends

- `Required`\<[`LookupOption`](https://evolu.dev/docs/api-reference/common/Lookup/interfaces/LookupOption)\<`K`, `L`\>\>

## Properties

<a id="entries"></a>

### entries?

```ts
readonly optional entries?: Iterable<readonly [K, V], any, any>;
```

Defined in: [packages/common/src/Lookup.ts:79](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Lookup.ts#L79)

Initial entries for the map.

---

<a id="lookup"></a>

### lookup

```ts
readonly lookup: Lookup<K, L>;
```

Defined in: [packages/common/src/Lookup.ts:44](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Lookup.ts#L44)

Derives the lookup key used for logical equality.

#### Inherited from

```ts
Required.lookup;
```