def List.find

Base · base.bend:1124

1124def List.find(~A: Data, ~f: A -> Bool, xs: List<&2, A>) -> Maybe<&2, A>:
1125  match xs:
1126    case Nil{}:
1127      None{}
1128    case +h <> t:
1129      List.find.if(A, h, u => List.find(~A, ~f, t), f(h))