diff options
Diffstat (limited to 'lib/ur/list.urs')
| -rw-r--r-- | lib/ur/list.urs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/ur/list.urs b/lib/ur/list.urs index 55068935..432d8c1a 100644 --- a/lib/ur/list.urs +++ b/lib/ur/list.urs @@ -105,3 +105,9 @@ val recToList : a ::: Type -> r ::: {Unit} -> folder r -> $(mapU a r) -> t a val drop : t ::: Type -> int -> list t -> list t val take : t ::: Type -> int -> list t -> list t val splitAt : t ::: Type -> int -> list t -> list t * list t + +(** Longest prefix of elements that satisfy a predicate, returned along with the remaining suffix *) +val span : a ::: Type -> (a -> bool) -> t a -> t a * t a + +(** Group a list into maximal adjacent segments where all elements compare as equal, according to the provided predicate. *) +val groupBy : a ::: Type -> (a -> a -> bool) -> t a -> t (t a) |