Music.Theory.Ord

Ordering functions

Documentation

min_by :: Ord a => (t -> a) -> t -> t -> t

Minimum by f.

ord_to_int :: Ordering -> Int

Specialised fromEnum.

int_to_ord :: Int -> Ordering

Specialised toEnum.

ord_invert :: Ordering -> Ordering

Invert Ordering.

map ord_invert [LT,EQ,GT] == [GT,EQ,LT]

order_pair :: Ordering -> (t, t) -> (t, t)

Given Ordering, re-order pair,

sort_pair :: (t -> t -> Ordering) -> (t, t) -> (t, t)

Sort a pair of equal type values using given comparison function.

sort_pair compare ('b','a') == ('a','b')

sort_pair_m :: (t -> t -> Maybe Ordering) -> (t, t) -> Maybe (t, t)

Variant where the comparison function may not compute a value.