Information for build ghc-random-1.2.1.1-1.oc9
| ID | 27414 | |||||||||||||||||||||||||||
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| Package Name | ghc-random | |||||||||||||||||||||||||||
| Version | 1.2.1.1 | |||||||||||||||||||||||||||
| Release | 1.oc9 | |||||||||||||||||||||||||||
| Epoch | Draft | False | ||||||||||||||||||||||||||
| Source | git+https://gitee.com/opencloudos-stream/ghc-random.git?.#5f3467ffd96a8ded726dcfcf37071992f4ae6fa5 | |||||||||||||||||||||||||||
| Summary | Pseudo-random number generation | |||||||||||||||||||||||||||
| Description | This package provides basic pseudo-random number generation, including the ability to split random number generators. == "System.Random": pure pseudo-random number interface In pure code, use 'System.Random.uniform' and 'System.Random.uniformR' from "System.Random" to generate pseudo-random numbers with a pure pseudo-random number generator like 'System.Random.StdGen'. As an example, here is how you can simulate rolls of a six-sided die using 'System.Random.uniformR': >>> let roll = uniformR (1, 6) :: RandomGen g => g -> (Word, g) >>> let rolls = unfoldr (Just . roll) :: RandomGen g => g -> [Word] >>> let pureGen = mkStdGen 42 >>> take 10 (rolls pureGen) :: [Word] [1,1,3,2,4,5,3,4,6,2] See "System.Random" for more details. == "System.Random.Stateful": monadic pseudo-random number interface In monadic code, use 'System.Random.Stateful.uniformM' and 'System.Random.Stateful.uniformRM' from "System.Random.Stateful" to generate pseudo-random numbers with a monadic pseudo-random number generator, or using a monadic adapter. As an example, here is how you can simulate rolls of a six-sided die using 'System.Random.Stateful.uniformRM': >>> let rollM = uniformRM (1, 6) :: StatefulGen g m => g -> m Word >>> let pureGen = mkStdGen 42 >>> runStateGen_ pureGen (replicateM 10 . rollM) :: [Word] [1,1,3,2,4,5,3,4,6,2] The monadic adapter 'System.Random.Stateful.runStateGen_' is used here to lift the pure pseudo-random number generator 'pureGen' into the 'System.Random.Stateful.StatefulGen' context. The monadic interface can also be used with existing monadic pseudo-random number generators. In this example, we use the one provided in the <https://hackage.haskell.org/package/mwc-random mwc-random> package: >>> import System.Random.MWC as MWC >>> let rollM = uniformRM (1, 6) :: StatefulGen g m => g -> m Word >>> monadicGen <- MWC.create >>> replicateM 10 (rollM monadicGen) :: IO [Word] [2,3,6,6,4,4,3,1,5,4] See "System.Random.Stateful" for more details. | |||||||||||||||||||||||||||
| Built by | fanjunkong | |||||||||||||||||||||||||||
| State | complete | |||||||||||||||||||||||||||
| Volume | DEFAULT | |||||||||||||||||||||||||||
| Started | Mon, 05 Aug 2024 12:30:09 CST | |||||||||||||||||||||||||||
| Completed | Mon, 05 Aug 2024 12:34:18 CST | |||||||||||||||||||||||||||
| Task | build (dist-oc9-epol, /opencloudos-stream/ghc-random.git:.:origin/master) | |||||||||||||||||||||||||||
| Extra | {'source': {'original_url': 'git+https://gitee.com/opencloudos-stream/ghc-random.git?.#origin/master'}} | |||||||||||||||||||||||||||
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| Changelog | * Mon Apr 15 2024 OpenCloudOS Release Engineering <releng@opencloudos.tech> - 1.2.1.1-1 - initial build |
