# Array.unique

## Function

Returns the new array after deduplication in order of first occurrence.

## Syntax

```bt
array.unique()
```

## Parameters

None.

## Return value

| Type | Description |
| ------ | ------ |
| Array | The new array after deduplication. |

## Code Example

```bt
result = [1, 2, 2, 3].unique()

// Output: [1,2,3]
print result
```

## Notes

- The original array is not modified.
- Objects and arrays are judged based on reference equality.