length package:vector is:exact

length :: Vector a -> Int
vector Data.Vector
O(1) Yield the length of the vector.
length :: Bundle v a -> Int
vector Data.Vector.Fusion.Bundle
Length of a Bundle
length :: Monad m => Bundle m v a -> m Int
vector Data.Vector.Fusion.Bundle.Monadic
Length of a Bundle
length :: Vector v a => v a -> Int
vector Data.Vector.Generic
O(1) Yield the length of the vector.
length :: MVector v a => v s a -> Int
vector Data.Vector.Generic.Mutable
Length of the mutable vector.
length :: MVector s a -> Int
vector Data.Vector.Mutable
Length of the mutable vector.
length :: Prim a => Vector a -> Int
vector Data.Vector.Primitive
O(1) Yield the length of the vector.
length :: Prim a => MVector s a -> Int
vector Data.Vector.Primitive.Mutable
Length of the mutable vector.
length :: Storable a => Vector a -> Int
vector Data.Vector.Storable
O(1) Yield the length of the vector.
length :: Storable a => MVector s a -> Int
vector Data.Vector.Storable.Mutable
Length of the mutable vector.
length :: Unbox a => Vector a -> Int
vector Data.Vector.Unboxed
O(1) Yield the length of the vector.
length :: Unbox a => MVector s a -> Int
vector Data.Vector.Unboxed.Mutable
Length of the mutable vector.