lrucaching: LRU cache

This is a package candidate release! Here you can preview how this package release will appear once published to the main package index (which can be accomplished via the 'maintain' link below). Please note that once a package has been published to the main package index it cannot be undone! Please consult the package uploading documentation for more information.

[maintain] [Publish]

Please see README.md


[Skip to Readme]

Properties

Versions 0.1.0, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.3, 0.3.4
Change log CHANGELOG.md
Dependencies base (>=4.8 && <5), base-compat (>=0.9 && <0.10), deepseq (>=1.4 && <1.5), hashable (>=1.2 && <1.3), psqueues (>=0.2 && <0.3), vector (>=0.11 && <0.13) [details]
License BSD-3-Clause
Copyright 2016
Author Moritz Kiefer
Maintainer moritz.kiefer@purelyfunctional.org
Category Unknown
Home page https://github.com/cocreature/lrucaching#readme
Source repo head: git clone https://github.com/cocreature/lrucaching
Uploaded by cocreature at 2018-01-12T13:18:55Z

Modules

[Index]

Downloads

Maintainer's Corner

Package maintainers

For package maintainers and hackage trustees


Readme for lrucaching-0.3.3

[back to package description]

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