Index - U
| uncons | Data.List.Extra, Extra |
| uncurry | Data.Tuple.Extra |
| UndefinedElement | Control.Exception.Extra |
| Underflow | Control.Exception.Extra |
| unfoldr | Data.List.Extra |
| unGetChan | Control.Concurrent.Extra |
| uninterruptibleMask | Control.Exception.Extra |
| uninterruptibleMask_ | Control.Exception.Extra |
| union | Data.List.Extra |
| unionBy | Data.List.Extra |
| unit | Control.Monad.Extra, Extra |
| universalNewlineMode | System.IO.Extra |
| unless | Control.Monad.Extra |
| unlessM | Control.Monad.Extra, Extra |
| unlines | Data.List.Extra |
| Unmasked | Control.Exception.Extra |
| unsetEnv | System.Environment.Extra |
| unsnoc | Data.List.Extra, Extra |
| unwords | Data.List.Extra |
| unzip | Data.List.Extra |
| unzip3 | Data.List.Extra |
| unzip4 | Data.List.Extra |
| unzip5 | Data.List.Extra |
| unzip6 | Data.List.Extra |
| unzip7 | Data.List.Extra |
| upper | Data.List.Extra, Extra |
| UseHandle | System.Process.Extra |
| UserInterrupt | Control.Exception.Extra |
| utf16 | System.IO.Extra |
| utf16be | System.IO.Extra |
| utf16le | System.IO.Extra |
| utf32 | System.IO.Extra |
| utf32be | System.IO.Extra |
| utf32le | System.IO.Extra |
| utf8 | System.IO.Extra |
| utf8_bom | System.IO.Extra |