March 2018 - Haskell-Cafe

GSoC Mentoring/Voting
by Aloïs Cochard 26 Mar '18

26 Mar '18

Hi all, I'm a bit confuse about the process regarding voting on GSoC proposals and proposing as mentor. I receive email from Google that seems to talk about a UI that I have never seen (i.e. they speak about some purple button "I want to be mentor"), OTOH there is this GitHub repository where it seems people contributed proposals. It seems like tomorrow is the deadline for the proposal, so I'm curious what will be the next steps for potential mentor as it seems we diverged a bit from the "official Google way". Thanks for the help. -- *Λ\oïs* http://twitter.com/aloiscochard http://github.com/aloiscochard

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GSoC Project Introduction: Accelerate Automatic Differentiation
by Charles Blake 25 Mar '18

25 Mar '18

Dear all, I'm a student interested in the GSoC programme and I wanted to introduce myself and make contact with those involved in potentially mentoring for the 'Implementing Automatic Differentiation in Accelerate' project (https://summer.haskell.org/ideas.html#accelerate-automatic-differentiation) If it would be more appropriate for me to contact those individuals directly then please let me know. My name is Charlie Blake, and I'm currently coming to the end of my CS undergrad degree. Much of my study of late has been focused on functional programming and parallelism - so when I saw this project proposal it jumped out at me! I was expecting to be assisting research at my university (St Andrews University, Scotland) in this field over the summer, but this arrangement has recently fallen through. Hence why I'm unfortunately sending this message rather close to the deadline. Nevertheless, I'm now hoping very much to get on the GSoC program, to which I am very much committed. With regards to the project itself, I'm currently in the process of drawing up a proposal. Although I'm making every effort to read as much as I can about the 'ad' and 'accelerate' libraries, it's still quite hard to get a good sense of the scope of the project. Would, for instance, it be a reasonable goal to expect to be able to implement all of the core 'ad' functionality in my own parallel library in the time-frame? This seems like the natural objective, but I don't want to propose an unrealistically large project if this is not feasible. If anyone has answers to these questions and might further be willing to discuss a draft project proposal with me over the next few days that would be greatly appreciated. Many thanks, Charlie Blake

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Munich Haskell Meeting, 2018-03-28 @ 19:30
by Christian Neukirchen 25 Mar '18

25 Mar '18

Dear all, Next week, our monthly Munich Haskell Meeting will take place again on Wednesday, March 28 at Cafe Puck at 19h30. For details see here: http://muenchen.haskell.bayern/dates.html If you plan to join, please add yourself to this dudle so we can reserve enough seats! It is OK to add yourself to the dudle anonymously or pseudonymously. https://dudle.inf.tu-dresden.de/haskell-munich-mar-2018/ Everybody is welcome! cu, -- Christian Neukirchen <chneukirchen(a)gmail.com> http://chneukirchen.org

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[ANN] brittany-0.9.0.0 (on both hackage&stackage)
by lennart spitzner 25 Mar '18

25 Mar '18

- Implement `IndentPolicyLeft`: A layouting setting that disables "hanging indentation". This indentation mode may become default in the future. Only configurable via config-file for the time being. - (!) commandline interface is reworked slightly to support multiple inputs/outputs (`brittany --write-mode=inplace *.hs`). This removes the --input/--output flags. - Ensure compatibility with stackage - Change default global config path (old configs are still respected) - Improve support for per-project config - Fix several bugs and Improve language extension support full changelog at https://hackage.haskell.org/package/brittany-0.9.0.0/changelog brittany was recently added to stackage, and should hopefully be included in the next LTS release. -- lennart

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GSoC Haddock project
by Quentin Liu 24 Mar '18

24 Mar '18

Hi all, I am Qingbo Liu, a cs student from Colby College, ME. I’m very interested in the Hi Haddock project and would like to work on it for the summer. Currently I have finished a draft proposal and I am revising it (Thank Alex Biehl here for his kind suggestions). If the project would help you and you are willing to spend some time improving the proposal, please take a look at [1]. Any comment is appreciated. [1] https://docs.google.com/document/d/1BcSeLu8X9QwiM5LzYq5UEU5jIFF7hogdDT3UByU… Best Regards, Qingbo Liu

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Incorrect link to Haskell Summer of Code page on Reddit
by Henk-Jan van Tuyl 24 Mar '18

24 Mar '18

L.S., The Reddit forum haskell_proposals links to "Haskell Google Summer of Code site", which is https://ghc.haskell.org/trac/summer-of-code/wiki/WikiStart The linked page contains a suggestion for which shoes to buy for "running, casual wear, lifting". I suppose the subreddit should point to https://summer.haskell.org/ (The Haskell Summer of Code Trac also contains spam in the Tickets.) Regards, Henk-Jan van Tuyl -- Message from Stanford University: Folding@home What if you could share your unused computer power to help find a cure? In just 5 minutes you can join the world's biggest networked computer and get us closer sooner. Watch the video. http://foldingathome.stanford.edu/ -- http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --

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I am interested in doing Offline mode for Stack as GSoC 2018 project
by Akhil Seshan 24 Mar '18

24 Mar '18

Hi, I am Akhil Seshan, B.Tech Computer Science and Engineering Student. I would like to do Offline mode for Stack as the GSoC 2018 project. I have basic knowledge in Haskell/Functional programming but have an intermediate knowledge in Object oriented programming. I used Stack which is used for running Haskell programs. Kindly do let me know the details for moving forward with this as my project,

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Oxford Haskell User Group
by Callan McGill 23 Mar '18

23 Mar '18

Hi! I am interested in starting a Haskell user group (or functional programming meetup) in Oxford and would like to hear from anyone else wanting to help organise it. Please feel free to get in contact. Best, Callan

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Summer of Code projects
by Luke Lau 22 Mar '18

22 Mar '18

Hello, I’m a beginner-intermediate Haskell programmer and would like to help out this summer with the SoC projects! I have a few questions about some of the project ideas: https://summer.haskell.org/ideas.html#format-preserving-yaml <https://summer.haskell.org/ideas.html#format-preserving-yaml> Would this new library aim to also use the C library behind the scenes, or would there be more interest in making a completely native Haskell version? (Do FFI calls in Haskell have any performance overhead?) https://github.com/haskell/haskell-ide-engine <https://github.com/haskell/haskell-ide-engine> This seems really cool! There are a lot of cool goals on the list I would like to take a stab at. Sharing build cache between HaRe and GHC, to drastically improve refactoring speed. Are there any examples of this being done with any other IDE extensions or build tools? Rewriting the completion system/LSP tests Are there any parts of the LSP specification that are missing or could be implemented better? Also I was curious as to what libraries/tools are used for parsing and analysing, if any at all? I briefly looked through the repository and couldn’t find anything particularly low-level. Thanks!

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Re: [Haskell-cafe] Dropping containers support for old GHC versions
by Adam Bergmark 22 Mar '18

22 Mar '18

I appreciate that it may be hard/undesirable for some to use the latest GHC, but overall I don't think we should need to maintain backwards compatibility indefinitely because of that. Older versions of containers will still work with older GHCs, and other libraries depending on containers will still work as well as long as they support older container versions. But nevertheless, at least it seems there are no objections to dropping 7.0 and 7.2.2 support so far? :) Cheers, Adam On Fri, 9 Mar 2018 at 17:20 Daniel Cartwright <chessai1996(a)gmail.com> wrote: > David, I just checked and you're correct - I believe I was remembering > some other library(ies), though I can't recall which ones. > > On Fri, Mar 9, 2018 at 11:08 AM, David Feuer <david.feuer(a)gmail.com> > wrote: > >> On Mar 9, 2018 10:55 AM, "Daniel Cartwright" <chessai1996(a)gmail.com> >> wrote: >> >> >> On a related note, I find it strange when looking through source code for >> 'containers'/other Haskell libraries and still see notes about supporting >> non-GHC Haskell compilers (e.g. Hugs) >> >> >> I believe we've stripped all references to Hugs and nhc98 from >> containers. If you find any, let us know. I'd be interested in adding >> support for Frege, but the way it deals with numeric literals could be >> problematic. >> >> > _______________________________________________ > Libraries mailing list > Libraries(a)haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries >

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