def big.trim.go
import yaml-for-bend@0.1.1.0/num.bend as Numimport Base
43def big.trim.go(ds: List<&2, Nat>) -> List<&2, Nat>:
44 match ds:
45 case Nil{}:
46 []
47 case Con{+d, +rest}:
48 when(List<&2, Nat>, Nat.is_eq(d, 0n), u => big.trim.go(rest), u => d <> rest)