Hasklepias.Functions

Provides functions used in defining Features.

Container predicates

isNotEmpty :: [a] -> Bool

Is the input list empty?

atleastNofX

Arguments

:: Int

n

-> [Text]

x

-> Events a

-> Bool

Does Events have at least n events with any of the Concept in x.

twoXOrOneY :: [Text] -> [Text] -> Events a -> Bool

TODO

Finding occurrences of concepts

nthConceptOccurrence

Arguments

:: (Events a -> Maybe (Event a))

function used to select a single event

-> [Text]

-> Events a

-> Maybe (Event a)

Filter Events to a single Maybe Event, based on a provided function, with the provided concepts. For example, see firstConceptOccurrence and lastConceptOccurrence.

firstConceptOccurrence :: [Text] -> Events a -> Maybe (Event a)

Finds the *first* occurrence of an Event with at least one of the concepts. Assumes the input Events list is appropriately sorted.

Reshaping containers

allPairs :: [a] -> [b] -> [(a, b)]

Generate all pair-wise combinations from two lists.

splitByConcepts :: [Text] -> [Text] -> Events a -> (Events a, Events a)

Split an Events a into a pair of Events a. The first element contains events have any of the concepts in the first argument, similarly for the second element.

Create filters

makeConceptsFilter

Arguments

:: [Text]

the list of concepts by which to filter

-> Events a

-> Events a

Filter Events to those that have any of the provided concepts.

makePairedFilter :: Ord a => ComparativePredicateOf2 (i0 a) (PairedInterval b a) -> i0 a -> (b -> Bool) -> [PairedInterval b a] -> [PairedInterval b a]