<> package:incipit-base

An associative operation.

Examples

>>> [1,2,3] <> [4,5,6]
[1,2,3,4,5,6]
>>> Just [1, 2, 3] <> Just [4, 5, 6]
Just [1,2,3,4,5,6]
>>> putStr "Hello, " <> putStrLn "World!"
Hello, World!
Concat two error message strings.
Put two pieces of error message next to each other.