Index - U
| uncons | Data.Sequences |
| union | Data.Containers |
| unions | Data.Containers |
| unionsWith | Data.Containers |
| unionWith | Data.Containers |
| unionWithKey | Data.Containers |
| unlines | Data.Sequences |
| unpack | Data.Sequences |
| unsafeDrop | Data.Sequences |
| unsafeHead | Data.MonoTraversable |
| unsafeIndex | Data.Sequences |
| unsafeInit | Data.Sequences |
| unsafeLast | Data.MonoTraversable |
| unsafeSplitAt | Data.Sequences |
| unsafeTail | Data.Sequences |
| unsafeTake | Data.Sequences |
| unsnoc | Data.Sequences |
| unwords | Data.Sequences |
| unwrapMono | Data.MonoTraversable |
| unwrapPoly | Data.MonoTraversable |
| updateLookupWithKey | Data.Containers |
| updateMap | Data.Containers |
| updateWithKey | Data.Containers |
| Utf8 | Data.Sequences |