elm-units-interval
This package lets you work with ranges of values (intervals) based on the
Quantity type from elm-units. You can do things like:
- Check if a given value is within an interval
- Construct intervals from lists of values or other intervals
- Find the intersection of two intervals
- Perform arithmetic on intervals
import Quantity.Interval as Interval exposing (Interval)
import Angle exposing (Radians)
import Pixels exposing (Pixels)
angleRange : Interval Float Radians
angleRange =
Interval.fromEndpoints
( Angle.degrees 0, Angle.degrees 180 )
widthRange : Interval Int Pixels
widthRange =
Interval.fromEndpoints
( Pixels.int 100, Pixels.int 300 )Various functionality is included for constructing intervals (including as the union or intersection of other intervals) and checking for overlap, intersection or containment:
import Quantity.Interval as Interval exposing (Interval)
import Length
import Duration
distanceInterval =
Interval.fromEndpoints
( Length.meters 10, Length.meters 20 )
Interval.endpoints distanceInterval
--> ( Length.meters 10, Length.meters 20 )
Interval.hull
(Length.feet 5)
[ Length.feet 3
, Length.feet 2
, Length.feet 4
]
--> Interval.fromEndpoints
--> ( Length.feet 2, Length.feet 5 )
Interval.aggregate2
(Interval.fromEndpoints
( Duration.minutes 1
, Duration.minutes 2
)
)
(Interval.fromEndpoints
( Duration.minutes 3
, Duration.minutes
)
)
--> Interval.fromEndpoints
--> ( Duration.minutes 1, Duration.minutes 5 )
Interval.intersection
(Interval.fromEndpoints
( Duration.hours 1
, Duration.hours 3
)
)
(Interval.fromEndpoints
( Duration.hours 2
, Duration.hours 5
)
)
--> Just <|
--> Interval.fromEndpoints
--> ( Duration.hours 2
--> , Duration.hours 3
--> )
Interval.fromEndpoints
( Angle.radians 0, Angle.radians pi )
|> Interval.contains (Angle.degrees 90)
--> True
Interval.fromEndpoints
( Angle.radians 0, Angle.radians pi )
|> Interval.contains (Angle.degrees 270)
--> FalseMost functionality is contained in the Quantity.Interval
module, but some functionality specific to particular kinds of intervals is
contained in Angle.Interval and Temperature.Interval.
