Index - U
| Unboxed | Data.PrimitiveArray.Dense, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| UndefBoundary | Data.PrimitiveArray.Index.BitSetClasses, Data.PrimitiveArray.Index, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| Unit | |
| 1 (Type/Class) | Data.PrimitiveArray.Index.Unit, Data.PrimitiveArray.Index, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| 2 (Data Constructor) | Data.PrimitiveArray.Index.Unit, Data.PrimitiveArray.Index, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| unsafeFreeze | Data.PrimitiveArray.Class, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| unsafeIndex | Data.PrimitiveArray.Class, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| unsafeThaw | Data.PrimitiveArray.Class, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| upperBound | Data.PrimitiveArray.Class, Data.PrimitiveArray, Data.PrimitiveArray.Checked |
| upperBoundM | Data.PrimitiveArray.Class, Data.PrimitiveArray, Data.PrimitiveArray.Checked |