I’m working through Chapter 5 of the PureScript book and want to make `lzs`

(longest zero suffix) more general. I came up with the following:

```
lzs :: forall a. Semiring a => Array a -> Array a
lzs [] = []
lzs xs = case sum xs of
zero -> xs
_ -> lzs (fromMaybe [] $ tail xs)
```

The `zero`

is being interpreted as a new variable with the name `zero`

instead of the `zero`

from `Prelude`

. Is there a way to tell PureScript to use the `zero`

from the global scope instead of creating a new variable?