Apply a function to a Dhall expression supplied via STDIN or file

I have a large JSON list in a file, and I wanted to use `json-to-dhall` output to get the length using a oneliner without . Is there a subcommand in the `dhall` executable that receives a Dhall function as a flag, another Dhall expression via STDIN or file and outputs the result of applying the function to that expression?

An example could be more descriptive:

```bash
# A list with a lot of elements
$ cat sample.json
[ ... ]
$ json-to-dhall --file sample.json | dhall --apply "List/length"
1234
```