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GHC Mutterings | thoughts from the developers of GHC | ghcmutterings.wordpress.com Reviews
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thoughts from the developers of GHC
ghcmutterings.wordpress.com
October | 2009 | GHC Mutterings
https://ghcmutterings.wordpress.com/2009/10
Thoughts from the developers of GHC. Monthly Archives: October 2009. October 6, 2009. If you want to make programs go faster on parallel hardware, then you need some kind of concurrency. Right? In this article I’d like to explain why the above statement is false, and why we should be very clear about … Continue reading →. Blog at WordPress.com. Blog at WordPress.com. Follow “GHC Mutterings”. Get every new post delivered to your Inbox. Build a website with WordPress.com.
December | 2008 | GHC Mutterings
https://ghcmutterings.wordpress.com/2008/12
Thoughts from the developers of GHC. Monthly Archives: December 2008. December 4, 2008. The ‘impossible’ happened) (GHC version 6.11.20081202 for i386-unknown-mingw32): idInfo Argh! When working on GHC, or in any Haskell in general, it is occasionally useful to know something about what was going on when a program crashed. Currently we … Continue reading →. Create a free website or blog at WordPress.com. Blog at WordPress.com. Follow “GHC Mutterings”. Get every new post delivered to your Inbox.
January | 2009 | GHC Mutterings
https://ghcmutterings.wordpress.com/2009/01
Thoughts from the developers of GHC. Monthly Archives: January 2009. Benchmarking recent improvements in parallelism. January 9, 2009. Over the last few months we’ve been making various improvements to the performance of parallel programs with GHC. I thought I’d post a few benchmarks so you can see where we’ve got to. This is a fairly random collection of … Continue reading →. Blog at WordPress.com. Create a free website or blog at WordPress.com. Follow “GHC Mutterings”.
February | 2009 | GHC Mutterings
https://ghcmutterings.wordpress.com/2009/02
Thoughts from the developers of GHC. Monthly Archives: February 2009. Ever wondered how big a closure is? February 12, 2009. Somebody asked me yesterday how to find out how big the runtime representation of a type is. I hacked this up using the internal unpackClosure# primitive: {-# LANGUAGE MagicHash,UnboxedTuples #-} module Size where import GHC.Exts import Foreign unsafeSizeof : a … Continue reading →. Blog at WordPress.com. Create a free website or blog at WordPress.com.
July | 2009 | GHC Mutterings
https://ghcmutterings.wordpress.com/2009/07
Thoughts from the developers of GHC. Monthly Archives: July 2009. Visualising the Haskell package dependency graph. July 6, 2009. This is a graph showing the dependencies between the packages that come with GHC. I just added some (trivial) support to the ghc-pkg tool to generate the output in dot format, and generated the above graph with ghc-pkg dot … Continue reading →. Create a free website or blog at WordPress.com. Blog at WordPress.com. Follow “GHC Mutterings”. Build a website with WordPress.com.
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Understanding Functions Which Use ‘instance Monad []’ by Equational Reasoning | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/06/19/understanding-functions-which-use-list-monad-by-equational-reasoning
Everything About Mathematics, Functional Programming, and Haskell. Understanding Functions Which Use ‘instance Monad []’ by Equational Reasoning. Leave a comment ». GüŸnther Schmidt asked in Haskell-Cafe how to get a stream like this. A, … , z, aa, … , az, ba, … , bz, … ]. Answer 1 (by Matthew Brecknell). Concat $ tail $ iterate (map (:) [‘a’ . ‘z’] * ) ]. Well, how does this expression do what we want? Concat, tail, iterate, map, are easy, looks like the magic is in ( * ). 8212; Lift a value. M1 = x1 -.
Finish reading of The Typeclassopedia | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/05/30/finish-reading-of-the-typeclassopedia
Everything About Mathematics, Functional Programming, and Haskell. Finish reading of The Typeclassopedia. Leave a comment ». Finish reading of The Typeclassopedia from The Monad.Reader 13. But it’s just the beginning of a series of reading about papers, articles, wikibooks, blog posts, and codes, as the author. It’s a great article, talks about Haskell’s type class and their relationship, has plenty of very useful references. Written by Lee Duhem. May 30, 2009 at 11:27 am. Leave a Reply Cancel reply.
Partition An Integer n to an arithmetic series | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/07/12/partition-an-integer-n-to-an-arithmetic-series
Everything About Mathematics, Functional Programming, and Haskell. Partition An Integer n to an arithmetic series. Leave a comment ». Give a positive integer n, generate all partition of n to an arithmetic series with common difference 1. First, a straightforward solution:. Second, a not so straightforward solution, but much more effective than the first:. You can check these two solutions are equal (upto n) by. Exercise: Prove solution two is right. We’ll prove it by three steps. To prove this, we only ...
Sieve of Eratosthenes In Haskell | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/05/20/sieve-of-eratosthenes-in-haskell
Everything About Mathematics, Functional Programming, and Haskell. Sieve of Eratosthenes In Haskell. Leave a comment ». Algorithm description, see Sieve of Eratosthenes. Module Main where import System.Environment isPrime p (x:xs) x*x p = True p `mod` x = 0 = False otherwise = isPrime p xs primes = 2 : oprimes where oprimes = 3 : [ p p - [5,7.], isPrime p oprimes] main = do args - getArgs let n = read $ args! 0 x = takeWhile ( n) primes print $ length x print x. There is a HackageDB package called primes.
Finish reading of FP Implementation | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/06/02/finish-reading-of-fp-implementation
Everything About Mathematics, Functional Programming, and Haskell. Finish reading of FP Implementation. Leave a comment ». Finish reading of The Implementation of Functional Programming Languages. By Simon Peyton Jones. Written by Lee Duhem. June 2, 2009 at 4:28 pm. Posted in Functional Programming. Laquo; Finish reading of The Typeclassopedia. Understanding ‘instance Monad ( - ) r)’ by type inference. Leave a Reply Cancel reply. Enter your comment here. Address never made public).
Understanding ‘instance Monad ((->) r)’ by type inference | Control.Monad.Reader
https://leeduhem.wordpress.com/2009/06/07/understanding-monad-instance-by-type-inference
Everything About Mathematics, Functional Programming, and Haskell. Understanding ‘instance Monad ( - ) r)’ by type inference. While reading source code of Control.Monad.Instances. I found I can’t understand ‘instance of Monad ( - ) r)’, but after read Brent Yorgey’s reply. In his blog post about The Typeclassopedia. He said, ‘the data constructor for (- ) is called lambda’, I suddenly found I CAN understand them by type inference. Here is how I do these. There are two points:. Return : (Monad m) = a - m a.
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GHC Mutterings | thoughts from the developers of GHC
Thoughts from the developers of GHC. August 25, 2010. We have created a new GHC blog at http:/ hackage.haskell.org/trac/ghc/blog. The new blog is part of our Trac and therefore should have lower overhead for posting, so hopefully we’ll use it more. I’ll leave this blog up though, it is probably more appropriate for longer or not-entirely-ghc-specific articles. Parallel programming in Haskell with explicit futures. August 20, 2010. Recently we released a new version of the parallel package. What I plan to...
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