every'

Type: every' :: Int -> Int -> (Pattern a -> Pattern a) -> Pattern a -> Pattern a

every' is a generalisation of every, taking one additional argument. The additional argument allows you to offset the function you are applying.

For example, every' 3 0 (fast 2) will speed up the cycle on cycles 0,3,6,… whereas every' 3 1 (fast 2) will transform the pattern on cycles 1,4,7,…

With this in mind, setting the second argument of every' to 0 gives the equivalent every function. For example, every 3 is equivalent to every' 3 0.