---
title: "scan(_:_:)"
framework: combine
role: symbol
role_heading: Instance Method
path: "combine/just/scan(_:_:)"
---

# scan(_:_:)

## Declaration

```swift
func scan<T>(_ initialResult: T, _ nextPartialResult: (T, Output) -> T) -> Result<T, Just<Output>.Failure>.Publisher
```

## See Also

### Mapping elements

- [map(_:)](combine/just/map(_:).md)
- [tryMap(_:)](combine/just/trymap(_:).md)
- [mapError(_:)](combine/just/maperror(_:).md)
- [tryScan(_:_:)](combine/just/tryscan(_:_:).md)
- [setFailureType(to:)](combine/just/setfailuretype(to:).md)