# compareElementAt

**Kind:** Function

**Source:** [`packages/websockets/utils/compare-element.util.ts`](https://github.com/nestjs/nest/blob/master/packages/websockets/utils/compare-element.util.ts#L1)

**Part of:** [Websockets](subsystem-packages-websockets)

## Signature

```ts
function compareElementAt(prev: unknown[], curr: unknown[], index: number)
```

## Parameters

| Name | Type |
|---|---|
| `prev` | `unknown[]` |
| `curr` | `unknown[]` |
| `index` | `number` |