lrucaching: LRU cache

[ bsd3, library, unknown ] [ Propose Tags ]

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Versions 0.1.0, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.3.2, 0.3.3
Change log CHANGELOG.md
Dependencies base (>=4.8 && <5), base-compat (>=0.9 && <0.11), deepseq (==1.4.*), hashable (==1.2.*), psqueues (==0.2.*), vector (>=0.11 && <0.13) [details]
License BSD-3-Clause
Copyright 2016
Author Moritz Kiefer
Maintainer moritz.kiefer@purelyfunctional.org
Revised Revision 2 made by cocreature at Thu Apr 5 19:08:06 UTC 2018
Category Unknown
Home page https://github.com/cocreature/lrucaching#readme
Source repo head: git clone https://github.com/cocreature/lrucaching
Uploaded by cocreature at Fri Jan 12 13:19:00 UTC 2018
Distributions LTSHaskell:0.3.3, NixOS:0.3.3, Stackage:0.3.3, openSUSE:0.3.3
Downloads 1639 total (16 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2018-01-13 [all 1 reports]
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Readme for lrucaching-0.3.3

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lrucaching

Build Status Hackage

An implementation of lrucaches based on a blogpost by Jasper Van der Jeugt.

This package has no relation to lrucache. I created it because there were bugs in lrucache and the maintainer was not responding to issues.

Usage

The easiest way to use this library is to use Data.LruCache.IO. This wraps the cache in a Data.IORef, a mutable varible in the IO monad.

e.g. To create a 1000-item cache, keyed by Integer, storing String:

import qualified Data.LruCache.IO as LRU

newCache :: IO (LRU.LruHandle Integer String)
newCache = LRU.newLruHandle 1000

cachedLookup cache key = LRU.cached cache key $
    -- insert some something expensive
    return $ show key

main :: IO ()
main = do
    cache <- newCache
    cachedLookup cache 123 >>= putStrLn