> 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/map3.md).

# map3

### TaskValidation.map3

Namespace: `FsToolkit.ErrorHandling`

Function Signature:

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

Like [Result.map3](/fstoolkit-errorhandling/fstoolkit.errorhandling/result/map3.md), but collects the errors from all arguments.

### Examples