# Empty

---

Container type can be null

```text
%empty
```

## Use with `Result` Union

```text
make_array : ([yes]
    ? yes {
        `value Array $ (1; 2; 3)
        `null
    }
)
v : make_array(...) // %empty Array[I64] $ .null OR %empty Array[I64] $ (.value : (1; 2; 3))
# v {
    .value {[x] `log x } // Array[I64] $ (1; 2; 3)
    .null { ... }
}
// same as above
? v {[x] `log x } // Array[I64] $ (1; 2; 3)
```