IntervalMap: Containers for intervals, with efficient search.

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Ordered containers of intervals, with efficient search for all keys containing a point or overlapping an interval. See the example code on the home page for a quick introduction.


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Versions 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.3.1, 0.2.3.2, 0.2.3.3, 0.3.0.0, 0.3.0.1, 0.3.0.2, 0.3.0.3, 0.4.0.0, 0.4.0.1, 0.4.1.0, 0.4.1.1, 0.5.0.0, 0.5.0.1, 0.5.1.0, 0.5.1.1, 0.5.2.0, 0.5.3.1, 0.6.0.0, 0.6.0.0, 0.6.1.0, 0.6.1.1, 0.6.1.2
Change log changelog
Dependencies base (==4.*), containers, deepseq [details]
License BSD-3-Clause
Copyright 2011-2018 Christoph Breitkopf
Author Christoph Breitkopf
Maintainer Christoph Breitkopf <chbreitkopf@gmail.com>
Category Data
Home page http://www.chr-breitkopf.de/comp/IntervalMap
Bug tracker mailto:chbreitkopf@gmail.com
Source repo head: git clone https://github.com/bokesan/IntervalMap
Uploaded by ChristophBreitkopf at 2018-03-16T09:31:05Z

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Readme for IntervalMap-0.6.0.0

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IntervalMap Hackage Build Status

Containers for intervals. Like Data.Set and Data.Map with Intervals as keys and functions for efficiently getting the subset of all intervals containing a point, intersecting an interval, and more.

Home page and documentation: http://www.chr-breitkopf.de/comp/IntervalMap/index.html

Getting started

Enable necessary language extensions:

{-# LANGUAGE MultiParamTypeClasses, FlexibleInstances #-}

In most cases, you should use the value-strict version:

import qualified Data.IntervalMap.Generic.Strict as IM

Make tuples an instance of Interval:

instance Ord e => IM.Interval (e,e) e where
    lowerBound (a,_) = a
    upperBound (_,b) = b
    rightClosed _ = False

By using rightClosed _ = False we have defined tuples to be half-open intervals - they include the starting value, but not the end value.

Let's create a map from (Int,Int) intervals to strings:

type MyMap = IM.IntervalMap (Int,Int) String

sample :: MyMap
sample = IM.fromList [((1,6), "Foo"), ((2,4), "Bar"), ((4,7), "Baz")]

Lookup intervals containing a given point ("stabbing query"):

> IM.toAscList (sample `IM.containing` 3)
[((1,6),"Foo"),((2,4),"Bar")]
> IM.toAscList (sample `IM.containing` 4)
[((1,6),"Foo"),((4,7),"Baz")]