In Elixir, is there any way to get a module to list its functions?

Question

In the same way that we can get any object (or class) in Ruby to list its methods, is there any function in Elixir to list all functions belonging to a module? Something (at least remotely) like `String.functions` (where `String` could be replaced by any other module name)?

Accepted Answer

Each module in Elixir defines an `__info__` function you can call to get information about that module.

According the Elixir Docs, 1.6.6 e.g., you can pass it `:functions` to get a list of functions that module contains.

```
Map.__info__(:functions)

[delete: 2, drop: 2, equal?: 2, fetch: 2, fetch!: 2, from_struct: 1, get: 2,
 get: 3, has_key?: 2, keys: 1, merge: 2, merge: 3, new: 0, pop: 2, pop: 3,
 put: 3, put_new: 3, size: 1, split: 2, take: 2, to_list: 1, update: 4,
 update!: 3, values: 1]
```

In Elixir, is there any way to get a module to list its functions?

Solution

Problem