one fable-low hijack cell
pair haskell / lean
envelope code_haskell_alt
ordering AB
effort low
Haskell alternative operator — '{X} <|> {Y}' (Alternative class).
verdictpicked haskell (first-offered)
· classifierA
· tiernone
response (200 chars)
# `<|>` in Haskell vs Lean
## Haskell: `Alternative` typeclass
```haskell
class Applicative f => Alternative f where
empty :: f a
(<|>) :: f a -> f a -> f a
```
It means "try the first; if it f
neighbors