> For the complete documentation index, see [llms.txt](https://demystifyfp.gitbook.io/fstoolkit-errorhandling/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://demystifyfp.gitbook.io/fstoolkit-errorhandling/fstoolkit.errorhandling/index-2/apply.md).

# apply

### TaskValidation.apply

Namespace: `FsToolkit.ErrorHandling`

Function Signature:

```fsharp
Task<Result<('a -> 'b), 'c list>>
  -> Task<Result<'a, 'c list>>
  -> Task<Result<'b, 'c list>>
```

### Examples