elm-interval

This package implements a simple Interval type for Elm. Both Int and Float intervals are supported, for example:

rgbRange : Interval Int
rgbRange =
    Interval.from 0 255

angleRange : Interval Float
angleRange =
    Interval.from 0 (2 * pi)

Various functionality is included for constructing intervals (including as the hull or intersection of other intervals), checking for overlap/intersection/containment, and performing limited arithmetic on intervals:

unitInterval =
    Interval.from 0 1

Interval.endpoints unitInterval
--> ( 0, 1 )

Interval.hull 5 [ 3, 2, 4 ]
--> Interval.from 2 5

Interval.union
    (Interval.from 1 2)
    (Interval.from 3 5)
--> Interval.from 1 5

Interval.intersection
    (Interval.from 1 3)
    (Interval.from 2 5)
--> Just (Interval.from 2 3)

Interval.intersection
    (Interval.from 1 2)
    (Interval.from 3 5)
--> Nothing

Interval.contains 0 (Interval.from -1 3)
--> True

Interval.contains 5 (Interval.from -1 3)
--> False

Interval.sin (Interval.from 0 pi)
--> Interval.from 0 1