elemIndex -package:utf8-string package:vector

elemIndex :: Eq a => a -> Vector a -> Maybe Int
vector Data.Vector
O(n) Yield Just the index of the first occurrence of the given element or Nothing if the vector does not contain the element. This is a specialised version of findIndex.
elemIndex :: (Vector v a, Eq a) => a -> v a -> Maybe Int
vector Data.Vector.Generic
O(n) Yield Just the index of the first occurrence of the given element or Nothing if the vector does not contain the element. This is a specialised version of findIndex.
elemIndex :: (Prim a, Eq a) => a -> Vector a -> Maybe Int
vector Data.Vector.Primitive
O(n) Yield Just the index of the first occurrence of the given element or Nothing if the vector does not contain the element. This is a specialised version of findIndex.
elemIndex :: (Storable a, Eq a) => a -> Vector a -> Maybe Int
vector Data.Vector.Storable
O(n) Yield Just the index of the first occurrence of the given element or Nothing if the vector does not contain the element. This is a specialised version of findIndex.
elemIndex :: (Unbox a, Eq a) => a -> Vector a -> Maybe Int
vector Data.Vector.Unboxed
O(n) Yield Just the index of the first occurrence of the given element or Nothing if the vector does not contain the element. This is a specialised version of findIndex.