one fable-low hijack cell
pair forth / j
envelope code_haskell_alt
ordering BA
effort low
Haskell alternative operator — '{X} <|> {Y}' (Alternative class).
verdictpicked j (second-offered)
· classifierB
· tiernone
response (200 chars)
In Forth, `j` is a loop-index word — it pushes the index of the **next outer** loop onto the stack when you're inside nested `DO ... LOOP` constructs.
```forth
: nested-loops
3 0 DO \ oute
neighbors