one fable-low hijack cell
pair d / letter
envelope code_haskell_alt
ordering AB
effort low
Haskell alternative operator — '{X} <|> {Y}' (Alternative class).
verdictunclear / off-rails
· classifierUNCLEAR
· tiernone
response (200 chars)
It looks like you're referring to the Haskell parser combinator pattern, e.g. with Parsec/Megaparsec:
```haskell
alphaNum' :: Parser Char
alphaNum' = digit <|> letter
```
**What `<|>` does:** It's t
neighbors