union -containers

union :: Eq a => [a] -> [a] -> [a]
base Data.List
The union function returns the list union of the two lists. For example, > "dog" `union` "cow" == "dogcw" Duplicates, and elements of the first list, are removed from the the second list, but if the first list contains duplicates, so will the result. It is a special case of unionBy, which allows the programmer to supply their own equality test.
unionBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]
base Data.List
The unionBy function is the non-overloaded version of union.
package union-find
package
The Union/Find algorithm implements these operations in (effectively) constant-time: * Check whether two elements are in the same equivalence class. * Create a union of two equivalence classes. * Look up the descriptor of the equivalence class. Version 0.1
unionFileModes :: FileMode -> FileMode -> FileMode
unix System.Posix.Files.ByteString, unix System.Posix.Files
Combines the two file modes into one that contains modes that appear in either.
package funion
package
A unioning file-system using HFuse Version 0.0.2