Data.Selection

Data structure for describing selections of values

Documentation

data Selection a

Selection: description of a set of values

Instances

Monoid (Selection a)

mempty  = empty
mappend = union

Methods

mempty :: Selection a

mappend :: Selection a -> Selection a -> Selection a

mconcat :: [Selection a] -> Selection a

includes :: Selection a -> a -> Bool

Check whether a value is included in a selection

selectBy :: (a -> Bool) -> Selection a

Select the values that fulfill a predicate

empty :: Selection a

Empty selection

universal :: Selection a

Select all values

select :: Eq a => [a] -> Selection a

Create a classification from a list of elements

union :: Selection a -> Selection a -> Selection a

Union of selections

intersection :: Selection a -> Selection a -> Selection a

Intersection of selections

difference :: Selection a -> Selection a -> Selection a

Difference of selections

allExcept :: Eq a => [a] -> Selection a

Select all values except those in the given list