---
title: "replace(data:)"
framework: dispatch
role: symbol
role_heading: Instance Method
path: "dispatch/dispatchsourceuserdatareplace/replace(data:)"
---

# replace(data:)

Replaces the current pending data with the new value you provide.

## Declaration

```swift
func replace(data: UInt)
```

## Parameters

- `data`: The data that replaces the current pending value.

## Discussion

Discussion After you call this method, the dispatch source submits its event handler to its target queue to process the data. If you specify 0 for the data parameter, the dispatch source does not submit its event hander for execution.