>> package:xmonad-contrib

Composes two Arrs using >>= from Prelude.

Sequentially compose two actions, passing any value produced by the first as an argument to the second. 'as >>= bs' can be understood as the do expression

do a <- as
bs a

A helper operator for use in composeAll. It takes a condition and a function taking a grouped datum to action. If p is true, it executes the resulting action.

A helper operator for use in composeOne. It takes a condition and a function taking a groupdatum to action. If p is true, it executes the resulting action. If it fails, it returns Nothing from the Query so composeOne will go on and try the next rule.