DOCSLIB.ORG

Haskell Communities and Activities Report

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Haskell Communities and Activities Report Haskell Communities and Activities Report http://tinyurl.com/haskcar Twenty-Sixth Edition — May 2014 Mihai Maruseac, Alejandro Serrano Mena (eds.) Andreas Abel Alexander Granin Heinrich Apfelmus Daniel Austin Emil Axelsson Doug Beardsley Jean-Philippe Bernardy Jeroen Bransen Joachim Breitner Erik de Castro Lopo Lucas DiCioccio Roman Cheplyaka Olaf Chitil Alberto Gómez Corona Duncan Coutts Atze Dijkstra Péter Diviánszky Richard Eisenberg Andrew Farmer Dennis Felsing Julian Fleischer Andrew Gibiansky Brett G. Giles Andy Gill Jurriaan Hage Greg Hale Bastiaan Heeren Sylvain Henry PÁLI Gábor János Bob Ippolito Philipp Kant Robin KAY Anton Kholomiov Ian-Woo Kim Oleg Kiselyov Edward Kmett Eric Kow Nickolay Kudasov Ben Lippmeier Andres Löh Rita Loogen Boris Lykah Ian Lynagh Christian Maeder José Pedro Magalhães Ketil Malde Mihai Maruseac Dino Morelli JP Moresmau Ben Moseley Tom Nielsen Rishiyur Nikhil Kiwamu Okabe Jens Petersen Haskell Consultancy Munich Simon Peyton Jones Ian Ross David Sabel Martijn Schrage Carter Tazio Schonwald Jeremy Shaw Christian Höner zu Siederdissen Jim Snow Michael Snoyman Andrei Soare Doaitse Swierstra Bernhard Urban Alessio Valentini Adam Vogt Daniel Wagner Kazu Yamamoto Edward Z. Yang Brent Yorgey Alan Zimmerman Preface This is the 26th edition of the Haskell Communities and Activities Report. As usual, fresh entries are formatted using a blue background, while updated entries have a header with a blue background. Entries on which no new activity has been reported for a year or longer have been dropped completely. Please do revive such entries next time if you do have news on them. This edition is the first one in which the people behind HCAR are new. Because of that, the development of this edition started a little slower but will improve in time as we get used with the process. We want to thank Janis for keeping HCAR going so far and for helping us in taking over on this edition. A call for new HCAR entries and updates to existing ones will be issued on the Haskell mailing lists in October. Now enjoy the current report and see what other Haskellers have been up to lately. Any feedback is very welcome, as always. Mihai Maruseac, University of Massachusetts Boston, US Alejandro Serrano Mena, Utrecht University, Netherlands [email protected] 2 Contents 1 Community 7 1.1 Haskell’ — Haskell 2014.......................................... 7 1.2 Haskellers.................................................. 7 2 Books, Articles, Tutorials 8 2.1 The Monad.Reader............................................. 8 2.2 Oleg’s Mini Tutorials and Assorted Small Projects........................... 8 2.3 Agda Tutorial................................................ 9 2.4 School of Haskell.............................................. 9 3 Implementations 10 3.1 The Glasgow Haskell Compiler...................................... 10 3.2 Ajhc Haskell Compiler........................................... 13 3.3 UHC, Utrecht Haskell Compiler...................................... 14 3.4 Specific Platforms............................................. 15 3.4.1 Haskell on FreeBSD............................................ 15 3.4.2 Debian Haskell Group........................................... 15 3.4.3 Fedora Haskell SIG............................................. 15 4 Related Languages and Language Design 17 4.1 Agda..................................................... 17 4.2 MiniAgda.................................................. 17 4.3 Disciple................................................... 17 4.4 Ermine................................................... 18 5 Haskell and . 19 5.1 Haskell and Parallelism.......................................... 19 5.1.1 Eden..................................................... 19 5.1.2 speculation................................................. 20 5.2 Haskell and the Web............................................ 20 5.2.1 WAI..................................................... 20 5.2.2 Warp.................................................... 20 5.2.3 Happstack.................................................. 20 5.2.4 Mighttpd2 — Yet another Web Server.................................. 21 5.2.5 Yesod.................................................... 22 5.2.6 Snap Framework.............................................. 23 5.2.7 Sunroof................................................... 23 5.2.8 MFlow.................................................... 23 5.2.9 Scotty.................................................... 24 5.3 Haskell and Compiler Writing....................................... 24 5.3.1 MateVM................................................... 24 5.3.2 UUAG.................................................... 25 5.3.3 LQPL — A Quantum Programming Language Compiler and Emulator................ 26 5.3.4 free — Free Monads............................................ 26 5.3.5 bound — Making De Bruijn Succ Less.................................. 27 6 Development Tools 28 6.1 Environments................................................ 28 6.1.1 Haskell IDE From FP Complete..................................... 28 6.1.2 EclipseFP.................................................. 28 6.1.3 Ariadne................................................... 29 6.1.4 ghc-mod — Happy Haskell Programming................................ 29 3 6.1.5 HaRe — The Haskell Refactorer..................................... 30 6.1.6 IHaskell: Haskell for Interactive Computing............................... 30 6.2 Code Management............................................. 31 6.2.1 Darcs.................................................... 31 6.2.2 DarcsWatch................................................. 32 6.2.3 cab — A Maintenance Command of Haskell Cabal Packages...................... 32 6.3 Interfacing to other Languages...................................... 32 6.3.1 java-bridge................................................. 32 6.3.2 fficxx..................................................... 32 6.4 Deployment................................................. 33 6.4.1 Cabal and Hackage............................................. 33 6.4.2 Stackage: the Library Dependency Solution............................... 34 6.4.3 standalone-haddock............................................ 35 6.5 Others.................................................... 35 6.5.1 lhs2TEX................................................... 35 6.5.2 ghc-heap-view................................................ 35 6.5.3 ghc-vis.................................................... 36 6.5.4 Hat — the Haskell Tracer......................................... 36 6.5.5 Tasty.................................................... 37 7 Libraries, Applications, Projects 38 7.1 Language Features............................................. 38 7.1.1 Conduit................................................... 38 7.1.2 lens..................................................... 38 7.1.3 folds..................................................... 39 7.1.4 machines.................................................. 39 7.1.5 exceptions.................................................. 39 7.1.6 tables.................................................... 39 7.1.7 Faking even more dependent types!.................................... 40 7.1.8 Type checking units-of-measure...................................... 40 7.2 Education.................................................. 40 7.2.1 Exercism: crowd-sourced code reviews on daily practice problems................... 40 7.2.2 Talentbuddy................................................ 41 7.2.3 Holmes, Plagiarism Detection for Haskell................................ 41 7.2.4 Interactive Domain Reasoners....................................... 41 7.3 Parsing and Transforming......................................... 42 7.3.1 epub-metadata............................................... 42 7.3.2 Utrecht Parser Combinator Library: uu-parsinglib........................... 42 7.3.3 Grammar Products............................................. 43 7.3.4 HERMIT.................................................. 44 7.3.5 haskell-names................................................ 44 7.3.6 haskell-packages.............................................. 45 7.3.7 parsers.................................................... 45 7.3.8 trifecta.................................................... 45 7.4 Generic and Type-Level Programming.................................. 45 7.4.1 Optimising Generic Functions....................................... 45 7.4.2 traverse-with-class............................................. 46 7.4.3 constraints................................................. 46 7.5 Mathematics................................................ 46 7.5.1 Rlang-QQ.................................................. 46 7.5.2 order-statistics............................................... 46 7.5.3 Eliminating Redundancies in Linear Systems.............................. 47 7.5.4 linear.................................................... 47 7.5.5 algebra................................................... 47 7.5.6 semigroups and semigroupoids...................................... 47 7.5.7 Arithmetics packages (Edward Kmett).................................. 48 7.5.8 ad...................................................... 48 7.5.9 integration................................................. 48 4 7.5.10 categories.................................................. 49 7.5.11 contravariant...............................................
Load more

Recommended publications
  • PPS Activity Report 2007-2012
    PPS Activity Report 2007-2012 Laboratoire Preuves, Programmes, Syst`emes, UMR 7126 Universit´eParis Diderot and CNRS March 1, 2013 Contents 1 General presentation, objectives and results 2 1.1 Themes ........................................... 3 1.2 Milestones .......................................... 7 1.3 Structure and scientific organization of the PPS lab ................... 9 1.4 Scientific animation ..................................... 11 1.5 Funding ........................................... 12 1.6 Evolution of the composition and recruitment policy .................. 13 1.7 Summary of results ..................................... 16 1.8 Conclusion ......................................... 17 2 Theme: Proofs and Types 17 2.1 Lambda-calculus and extensions ............................. 17 2.2 Subtypes and intersection type for XML data processing ................ 18 2.3 Rewriting and security ................................... 19 2.4 Development of the Coq system .............................. 19 2.5 Formalization in Coq and in other proof assistants ................... 21 2.6 Certification of cost annotating compilers ........................ 22 2.7 Dependent types ...................................... 22 2.8 Classical logic, operational duality and effects ...................... 23 2.9 Delimited control ...................................... 24 2.10 Tensorial proof-nets and combinatorics of proofs .................... 24 2.11 Resource control in higher order languages ........................ 25 2.12 Resources in differential
    [Show full text]
  • An Optimizing Compiler for a Purely Functional Web-Application Language
    An Optimizing Compiler for a Purely Functional Web-Application Language Adam Chlipala MIT CSAIL, USA [email protected] Abstract conclude, then, that most Web applications would be written in C High-level scripting languages have become tremendously popular or other low-level languages that tend to enable the highest perfor- for development of dynamic Web applications. Many programmers mance. However, real-world programmers seem overwhelmingly to appreciate the productivity benefits of automatic storage manage- prefer the greater programming simplicity of high-level languages, ment, freedom from verbose type annotations, and so on. While it be they dynamically typed scripting languages like JavaScript or is often possible to improve performance substantially by rewrit- statically typed old favorites like Java. There is a genuine trade-off ing an application in C or a similar language, very few program- to be made between hardware costs for running a service and labor mers bother to do so, because of the consequences for human de- costs for implementing it. velopment effort. This paper describes a compiler that makes it Might there be a way to provide C-like performance for pro- possible to have most of the best of both worlds, coding Web ap- grams coded in high-level languages? While the concept of domain- plications in a high-level language but compiling to native code specific languages is growing in visibility, most Web applications with performance comparable to handwritten C code. The source are still written in general-purpose languages, coupled with Web- language is Ur/Web, a domain-specific, purely functional, stati- specific framework libraries.
    [Show full text]
  • How to Run Your Favorite Language in Web Browsers∗
    How to Run your Favorite Language in Web Browsers∗ The Revenge of Virtual Machines (over JavaScript) Benjamin Canou Emmanuel Chailloux LIP6 - UMR 7606 LIP6 - UMR 7606 Université Pierre et Marie Curie Université Pierre et Marie Curie Sorbonne Universités Sorbonne Universités 4 place Jussieu 4 place Jussieu 75005 Paris, France 75005 Paris, France [email protected] [email protected] Jérôme Vouillon CNRS, PPS UMR 7126 Univ Paris Diderot Sorbonne Paris Cité F-75205 Paris, France [email protected] ABSTRACT currency model or type system (to obtain a higher level of This paper is a concise guide for developers who want to expressivity or safety). port an existing language to Web browsers, about what to do and what not to. It is based on the various experiments However, the only common denominator between browsers that have been led in the OCaml language community. In in terms of programming capabilities is JavaScript. Plug-ins particular, it exhibits how reusing the underlying virtual used to be the way, but they are not available everywhere machine and bytecode associated to the language can come anymore. This means, on one hand, that there is no stan- of great help in this task. dard way to execute a program written in another language, and, on the other hand, that it has to be done through Categories and Subject Descriptors JavaScript. D.3.4 [Programming languages]: Processors We, the authors of this article, come from the OCaml[13] language community, in which several experiments have been General Terms led during the past few years to program the client part of Design, Languages, Experimentation Web applications.
    [Show full text]
  • Ocaml-Flat on the Ocsigen Framework
    Rita Pedroso Macedo Bachelor in Computer Science and Engineering OCaml-Flat on the Ocsigen framework Dissertation submitted in partial fulfillment of the requirements for the degree of Master of Science in Computer Science and Engineering Adviser: Artur Miguel Dias, Auxiliar Professor, NOVA School of Science and Technology Co-adviser: António Ravara, Associate Professor, NOVA School of Science and Technology Examination Committee Chair: Doutor Jorge Cruz, FCT-NOVA Rapporteur: Doutora Nelma Moreira, FCUP Member: Doutor Artur Miguel Dias, FCT-NOVA August, 2020 OCaml-Flat on the Ocsigen framework Copyright © Rita Pedroso Macedo, NOVA School of Science and Technology, NOVA Uni- versity Lisbon. The NOVA School of Science and Technology and the NOVA University Lisbon have the right, perpetual and without geographical boundaries, to file and publish this dissertation through printed copies reproduced on paper or on digital form, or by any other means known or that may be invented, and to disseminate through scientific repositories and admit its copying and distribution for non-commercial, educational or research purposes, as long as credit is given to the author and editor. This document was created using the (pdf)LATEX processor, based on the “novathesis” template[1], developed at the Dep. Informática of FCT-NOVA [2]. [1] https://github.com/joaomlourenco/novathesis [2] http://www.di.fct.unl.pt Acknowledgements First and foremost, I would like to express my gratitude to the Tezos Foundation which grant supported the development of my project. My utmost appreciation goes to my Advisers, Professors Artur Miguel Dias and An- tónio Ravara, whose commitment and support throughout the development of this project have been relentless and inspirational.
    [Show full text]
  • Haskell-Like S-Expression-Based Language Designed for an IDE
    Department of Computing Imperial College London MEng Individual Project Haskell-Like S-Expression-Based Language Designed for an IDE Author: Supervisor: Michal Srb Prof. Susan Eisenbach June 2015 Abstract The state of the programmers’ toolbox is abysmal. Although substantial effort is put into the development of powerful integrated development environments (IDEs), their features often lack capabilities desired by programmers and target primarily classical object oriented languages. This report documents the results of designing a modern programming language with its IDE in mind. We introduce a new statically typed functional language with strong metaprogramming capabilities, targeting JavaScript, the most popular runtime of today; and its accompanying browser-based IDE. We demonstrate the advantages resulting from designing both the language and its IDE at the same time and evaluate the resulting environment by employing it to solve a variety of nontrivial programming tasks. Our results demonstrate that programmers can greatly benefit from the combined application of modern approaches to programming tools. I would like to express my sincere gratitude to Susan, Sophia and Tristan for their invaluable feedback on this project, my family, my parents Michal and Jana and my grandmothers Hana and Jaroslava for supporting me throughout my studies, and to all my friends, especially to Harry whom I met at the interview day and seem to not be able to get rid of ever since. ii Contents Abstract i Contents iii 1 Introduction 1 1.1 Objectives ........................................ 2 1.2 Challenges ........................................ 3 1.3 Contributions ...................................... 4 2 State of the Art 6 2.1 Languages ........................................ 6 2.1.1 Haskell ....................................
    [Show full text]
  • Ur/Web: a Simple Model for Programming the Web
    Ur/Web: A Simple Model for Programming the Web The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Chlipala, Adam. "Ur/Web: A Simple Model for Programming the Web." The 42nd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL '15), January 15-17, 2015, Mumbai, India. As Published http://dl.acm.org/citation.cfm?id=2676726 Publisher Association for Computing Machinery (ACM) Version Author's final manuscript Citable link http://hdl.handle.net/1721.1/92321 Terms of Use Creative Commons Attribution-Noncommercial-Share Alike Detailed Terms http://creativecommons.org/licenses/by-nc-sa/4.0/ Ur/Web: A Simple Model for Programming the Web Adam Chlipala rtifact Comple * A t * te n * te A is W s E * e n l l C o L D MIT CSAIL C o P * * c u e m s O E u e e P n R t v e [email protected] o d t * y * s E a a l d u e a t Abstract for network communication, and on a language or API like SQL The World Wide Web has evolved gradually from a document de- for storing persistent, structured data on servers. Code fragments livery platform to an architecture for distributed programming. This in these different languages are often embedded within each other largely unplanned evolution is apparent in the set of interconnected in complex ways, and the popular Web development tools provide languages and protocols that any Web application must manage. little help in catching inconsistencies.
    [Show full text]
  • Ur/Web: a Simple Model for Programming the Web
    Ur/Web: A Simple Model for Programming the Web Adam Chlipala rtifact Comple * A t * te n * te A is W s E * e n l l C o L D MIT CSAIL C o P * * c u e m s O E u e e P n R t v e [email protected] o d t * y * s E a a l d u e a t Abstract for network communication, and on a language or API like SQL The World Wide Web has evolved gradually from a document de- for storing persistent, structured data on servers. Code fragments livery platform to an architecture for distributed programming. This in these different languages are often embedded within each other largely unplanned evolution is apparent in the set of interconnected in complex ways, and the popular Web development tools provide languages and protocols that any Web application must manage. little help in catching inconsistencies. This paper presents Ur/Web, a domain-specific, statically typed These complaints are not new, nor are language-based solutions. functional programming language with a much simpler model for The Links project [7, 11] pioneered the “tierless programming” programming modern Web applications. Ur/Web’s model is uni- approach, combining all the pieces of dynamic Web applications fied, where programs in a single programming language are com- within one statically typed functional language. More recent de- signs in the mainstream reap some similar benefits, as in Google’s piled to other “Web standards” languages as needed; supports novel 1 2 kinds of encapsulation of Web-specific state; and exposes simple Web Toolkit and Closure systems, for adding compilation on top concurrency, where programmers can reason about distributed, of Web-standard languages; and Microsoft’s LINQ [27], for type- multithreaded applications via a mix of transactions and cooper- safe querying (to SQL databases and more) within general-purpose ative preemption.
    [Show full text]
  • Theory and Implementation
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CiteSeerX Rethinking Traditional Web Interaction: Theory and Implementation Vincent Balat Univ Paris Diderot – Sorbonne Paris Cite´ – PPS, UMR 7126 CNRS, Inria – Paris, France Email: vincent.balat @ univ-paris-diderot.fr Abstract—In recent years, Web sites evolved into ever more Web application, through a browser interface. Web applications complex distributed applications. But current Web program- communicate with one or several servers, and sometimes need ming tools are not fully adapted to this evolution, and force the ability to make part of the computation in the browser. programmers to worry about too many inessential details. We A few similar Web interaction systems have already been want to define an alternative programming style better fitted to described before (for example Links [2], or Hop [3]). The goal that kind of applications. To do that, we propose an analysis of of this paper is to improve the way we program Web interaction Web interaction in order to break it down into very elementary notions, based on semantic criteria instead of technological ones. using one feature that has been very rarely addressed before, This allows defining a common vernacular language to describe namely: service identification. That is: how the service to the concepts of current Web programming tools, but also some handle a request is chosen. We will show that a good service other new concepts. We propose to use these new concepts to identification mechanism can help programmers a lot, and create new frameworks for programming Web applications.
    [Show full text]
  • Rethinking Traditional Web Interaction Vincent Balat
    Rethinking Traditional Web Interaction Vincent Balat To cite this version: Vincent Balat. Rethinking Traditional Web Interaction. International Conference on Internet and Web Applications and Services, Jun 2013, France. pp.1. hal-00826774 HAL Id: hal-00826774 https://hal.archives-ouvertes.fr/hal-00826774 Submitted on 28 May 2013 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Rethinking Traditional Web Interaction Vincent Balat Univ Paris Diderot – Sorbonne Paris Cite´ – PPS, UMR 7126 CNRS, Inria – Paris, France Email: vincent.balat @ univ-paris-diderot.fr Abstract—Web sites are evolving into ever more complex distributed Web application, with a consistent abstraction of concepts. A compiler applications. But current Web programming tools are not fully adapted to Javascript is used to run the client parts in the browser [6], [7]. to this evolution, and force programmers to worry about too many inessential details. We want to define an alternative programming style better fitted to that kind of applications. To do that, we propose an A. A common vernacular language for Web interaction analysis of Web interaction in order to break it down into very elementary Web development is highly constrained by technologies.
    [Show full text]
  • Rethinking Traditional Web Interaction
    ICIW 2013 : The Eighth International Conference on Internet and Web Applications and Services Rethinking Traditional Web Interaction Vincent Balat Univ Paris Diderot – Sorbonne Paris Cite´ – PPS, UMR 7126 CNRS, Inria – Paris, France Email: vincent.balat @ univ-paris-diderot.fr Abstract—Web sites are evolving into ever more complex distributed Web application, with a consistent abstraction of concepts. A compiler applications. But current Web programming tools are not fully adapted to Javascript is used to run the client parts in the browser [6], [7]. to this evolution, and force programmers to worry about too many inessential details. We want to define an alternative programming style better fitted to that kind of applications. To do that, we propose an A. A common vernacular language for Web interaction analysis of Web interaction in order to break it down into very elementary Web development is highly constrained by technologies. First, it notions, based on semantic criteria instead of technological ones. This allows defining a common vernacular language to describe the concepts relies on the HTTP protocol, which is non-connected and stateless. of current Web programming tools, but also some other new concepts. Then, Web applications must be executable in various browsers that This results in a significant gain of expressiveness. The understanding implement more or less accurately common standards and recommen- and separation of these notions also makes it possible to get strong dations. static guarantees, that can help a lot during the development of complex We want to detach ourselves as much as possible from these applications, for example by making impossible the creation of broken constraints and think about how we would like to program Web links.
    [Show full text]
  • Ocsigen, a Web Programming Framework
    Experience Report: Ocsigen, a Web Programming Framework Vincent Balat Jer´ omeˆ Vouillon Boris Yakobowski Laboratoire Preuves, Programmes et Systemes` Universite´ Paris Diderot (Paris 7), CNRS Paris, France fvincent.balat, jerome.vouillon, [email protected] Abstract Web programming is highly constrained by technology (pro- The evolution of Web sites towards very dynamic applications tocols, standards and browsers implementations). Commonly used makes it necessary to reconsider current Web programming tech- Web programming tools remain very close to this technology. We nologies. We believe that Web development would benefit greatly believe that Web development would benefit a lot from higher level from more abstract paradigms and that a more semantical approach paradigms and that a more semantical approach would result in would result in huge gains in expressiveness. In particular, func- huge gains in expressiveness. tional programming provides a really elegant solution to some im- It is now widely known in our community that functional pro- portant Web interaction problems, but few frameworks take advan- gramming is a really elegant solution to some important Web in- tage of it. teraction problems, as it offers a solution to the statelessness of the The Ocsigen project is an attempt to provide global solutions HTTP protocol (Queinnec 2000; Graham 2001; Hughes 2000). But this wisdom has not spread in the Web programming community. to these needs. We present our experience in designing this general 1 framework for Web programming, written in Objective Caml. It Almost no major Web framework is taking advantage of it. We provides a fully featured Web server and a framework for program- believe the reason is that functional programming has never been ming Web applications, with the aim of improving expressiveness fully exploited and that one must be very careful about the way it is and safety.
    [Show full text]
  • Mflow, a Continuation-Based Web Framework Without Continuations by Alberto Gomez Corona [email protected]
    MFlow, a continuation-based web framework without continuations by Alberto Gomez Corona [email protected] April 23, 2014 Most of the problems which complicate the coding and debugging of web applications come from the same properties which make web applications scalable and flexible: HTTP is stateless and HTML is untyped. Statelessness gives freedom to the user, but it implies an inversion of control, where the HTTP requests invoke different request handlers that manage a global state and generate individual web pages. Dijkstra's famous admonitions about goto statements apply to request handling mechanisms that manage these state transitions. Handlers do not share variable scopes, so, like in the case of the goto, code relies on global variables or on global session variables. There is no top-level structure in the code to make the main sequence evident. For the maintainer, it is very difficult to know what any piece of code is trying to achieve. Even worse, there is no inherent fixed sequence and the execution may be broken by out-of-order requests that do not match with the state of the application, forcing developers to pollute code with checking conditions and error messages. Continuation-based frameworks solve these problems since they maintain execu- tion state snapshots that match with each possible request. But continuations are memory hungry, and they cannot be easily serialized and shared. This precludes horizontal scalability and failover. As a result, these web frameworks have not been accepted by the mainstream, despite their advantages. In this article, I will show how an alternative monadic structure for thread state serialization and backtracking can solve these problems.
    [Show full text]