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Functional Programming at Facebook
Functional Programming at Facebook Chris Piro, Eugene Letuchy Commercial Users of Functional Programming (CUFP) Edinburgh, Scotland ! September "##$ Agenda ! Facebook and Chat " Chat architecture # Erlang strengths $ Setbacks % What has worked Facebook The Facebook Environment The Facebook Environment ▪ The web site ▪ More than 250 million active users ▪ More than 3.5 billion minutes are spent on Facebook each day The Facebook Environment ▪ The web site ▪ More than 250 million active users ▪ More than 3.5 billion minutes are spent on Facebook each day ▪ The engineering team ▪ Fast iteration: code gets out to production within a week ▪ Polyglot programming: interoperability with Thrift ▪ Practical: high-leverage tools win Using FP at Facebook Using FP at Facebook ▪ Erlang ▪ Chat backend (channel servers) ▪ Chat Jabber interface (ejabberd) ▪ AIM presence: a JSONP validator Using FP at Facebook ▪ Erlang ▪ Chat backend (channel servers) ▪ Chat Jabber interface (ejabberd) ▪ AIM presence: a JSONP validator ▪ Haskell ▪ lex-pass: PHP parse transforms ▪ Lambdabot ▪ textbook: command line Facebook API client ▪ Thrift binding Thrift Thrift ▪ An efficient, cross-language serialization and RPC framework Thrift ▪ An efficient, cross-language serialization and RPC framework ▪ Write interoperable servers and clients Thrift ▪ An efficient, cross-language serialization and RPC framework ▪ Write interoperable servers and clients ▪ Includes library and code generator for each language Thrift ▪ An efficient, cross-language serialization and RPC framework ▪ Write -
The Third Annual ICFP Programming Contest
The Third Annual ICFP Programming Contest August 26 – 29, 2000 (Version 1.18) 1 The problem This year’s ICFP programming challenge is to implement a ray tracer. The input to the ray tracer is a scene description written in a simple functional language, called GML. Execution of a GML program produces zero, or more, image files, which are in PPM format. A web page of sample images, along with the GML inputs that were used to produce them, is linked off of the contest home page. The feature set of GML is organized into three tiers. Submissions must implement the first tier of features and extra credit will be given to submissions that implement the second or third tiers. Submissions will be evaluated on three scales: correctness of the produced images, run-time performance, and the tier of implemented GML features. GML has primitives for defining simple geometric objects (e.g., planes, spheres, and cubes) and lighting sources. The surface properties used to render the objects are specified as functions in GML itself. In addition to supporting scene description, GML also has a render operator that renders a scene to an image file. For each pixel in the output image, the render command must compute a color. Conceptually, this color is computed by tracing the path of the light backwards from the eye of the viewer, to where it bounced off an object, and ultimately back to the light sources. This document is organized as follows. Section 2 describes the syntax and general semantics of the modeling language. It is followed by Section 3, which describes those aspects of the language that are specific to ray tracing. -
ICFP Programming Contest 2010 International Cars and Fuels Production
About Contest Task Running the Contest Background Winners Future ICFP Programming Contest 2010 International Cars and Fuels Production Bertram Felgenhauer, University of Innsbruck, Austria Johannes Waldmann, HTWK Leipzig, Germany June 18–21, 2010 Felgenhauer, Waldmann ICFP Programming Contest 2010 1/31 About Contest Task Running the Contest Background Winners Future About the ICFP Programming Contest programming, problem solving, fun annual contest, since 1998 sponsored by ICFP conference/ACM 2010 contest hosted by HTWK Leipzig, Germany contest format 72 hours (June 18, 12:00 – June 21, 12:00 GMT) participation online, international teams allowed no fixed programming language lightning division (first 24 hours) Felgenhauer, Waldmann ICFP Programming Contest 2010 2/31 earn money by (efficiently) solving instances, or creating instances (with solution, which is hard to find) income tax (devaluates earnings by 1/2 per day) About Contest Task Running the Contest Background Winners Future Contest Task storyline: market for cars (= problem instance) (public) fuels (= problem solution) (private) Felgenhauer, Waldmann ICFP Programming Contest 2010 3/31 About Contest Task Running the Contest Background Winners Future Contest Task storyline: market for cars (= problem instance) (public) fuels (= problem solution) (private) earn money by (efficiently) solving instances, or creating instances (with solution, which is hard to find) income tax (devaluates earnings by 1/2 per day) Felgenhauer, Waldmann ICFP Programming Contest 2010 3/31 About Contest Task -
ICFP 2009 Final Program
ICFP 2009 Final Program Monday, August 31, 2009 Tuesday, September 1, 2009 Wednesday, September 2, 2009 Invited Talk (Chair: Andrew Tolmach) Invited Talk (Chair: Graham Hutton) Invited Talk (Chair: Lennart Augustsson) 9:00 Organizing Functional Code for Parallel Execution; or, 9:00 Lambda, the Ultimate TA: Using a Proof Assistant to 9:00 Commutative Monads, Diagrams and Knots foldl and foldr Considered Slightly Harmful Teach Programming Language Foundations Dan Piponi; Industrial Light & Magic Guy L. Steele, Jr.; Sun Microsystems Benjamin C. Pierce; University of Pennsylvania 10:00 Break 10:00 Break 10:00 Break Session 11 (Chair: Ralf Hinze) Session 1 (Chair: Shin-Cheng Mu) Session 6 (Chair: Xavier Leroy) 10:25 Generic Programming with Fixed Points for Mutually 10:25 Functional Pearl: La Tour D’Hano¨ı 10:25 A Universe of Binding and Computation Recursive Datatypes Ralf Hinze; University of Oxford Daniel Licata and Robert Harper; Carnegie Mellon University Alexey Rodriguez Yakushev1, Stefan Holdermans2, Andres 2 3 10:50 Purely Functional Lazy Non-deterministic Program- 10:50 Non-Parametric Parametricity L¨oh , Johan Jeuring ; 1Vector Fabrics B.V., 2Utrecht University, ming Georg Neis, Derek Dreyer, Andreas Rossberg; MPI-SWS 3Utrecht University, Open University of the Netherlands Sebastian Fischer1, Oleg Kiselyov2, Chung-chieh Shan3; 11:15 Break 10:50 Attribute Grammars Fly First-Class: How to do As- 1Christian-Albrechts University, 2FNMOC, 3Rutgers University Session 7 (Chair: Robby Findler) pect Oriented Programming in Haskell 11:15 Break -
Stephanie Weirich –
Stephanie Weirich School of Engineering and Science, University of Pennsylvania Levine 510, 3330 Walnut St, Philadelphia, PA 19104 215-573-2821 • [email protected] July 13, 2021 Positions University of Pennsylvania Philadelphia, Pennsylvania ENIAC President’s Distinguished Professor September 2019-present Galois, Inc Portland, Oregon Visiting Scientist June 2018-August 2019 University of Pennsylvania Philadelphia, Pennsylvania Professor July 2015-August 2019 University of Pennsylvania Philadelphia, Pennsylvania Associate Professor July 2008-June 2015 University of Cambridge Cambridge, UK Visitor August 2009-July 2010 Microsoft Research Cambridge, UK Visiting Researcher September-November 2009 University of Pennsylvania Philadelphia, Pennsylvania Assistant Professor July 2002-July 2008 Cornell University Ithaca, New York Instructor, Research Assistant and Teaching AssistantAugust 1996-July 2002 Lucent Technologies Murray Hill, New Jersey Intern June-July 1999 Education Cornell University Ithaca, NY Ph.D., Computer Science 2002 Cornell University Ithaca, NY M.S., Computer Science 2000 Rice University Houston, TX B.A., Computer Science, magnum cum laude 1996 Honors ○␣ SIGPLAN Robin Milner Young Researcher award, 2016 ○␣ Most Influential ICFP 2006 Paper, awarded in 2016 ○␣ Microsoft Outstanding Collaborator, 2016 ○␣ Penn Engineering Fellow, University of Pennsylvania, 2014 ○␣ Institute for Defense Analyses Computer Science Study Panel, 2007 ○␣ National Science Foundation CAREER Award, 2003 ○␣ Intel Graduate Student Fellowship, 2000–2001 -
Submission Data for 2020-2021 CORE Conference Ranking Process International Conference on Functional Programming
Submission Data for 2020-2021 CORE conference Ranking process International Conference on Functional Programming Jeremy Gibbons Conference Details Conference Title: International Conference on Functional Programming Acronym : ICFP Rank: A* Requested Rank Rank: A* Recent Years Proceedings Publishing Style Proceedings Publishing: journal Link to most recent proceedings: https://dblp.uni-trier.de/db/journals/pacmpl/pacmpl4.html#nrICFP Further details: ACM introduced the PACM series of journals in 2017 for ”the best conferences published by ACM”, for publishing the proceedings of conferences with a two-phase reviewing process comparable to journal reviewing ( https://www.acm.org/publications/pacm/introducing-pacm). In particular, Proceedings of the ACM on Programming Languages (PACMPL) has published the proceedings of ICFP, OOPSLA, and POPL since September 2017 ( https://dl.acm.org/journal/pacmpl). It is published Gold Open Access. Most Recent Years Most Recent Year Year: 2019 URL: https://icfp19.sigplan.org/ Location: Berlin Papers submitted: 119 Papers published: 39 Acceptance rate: 33 Source for numbers: SlidesfromPCChair'sreport General Chairs Name: Derek Dreyer Affiliation: MPS-SWS Gender: M H Index: 33 GScholar url: https://scholar.google.com/citations?user=1_c89uMAAAAJ&hl=en DBLP url: Program Chairs Name: Francois Pottier Affiliation: INRIA Gender: M H Index: 30 GScholar url: https://scholar.google.com/citations?user=7R6jcZ0AAAAJ&hl=en DBLP url: 1 Second Most Recent Year Year: 2018 URL: https://icfp18.sigplan.org/ Location: St Louis, Missouri -
Daniel R. Licata
Daniel R. Licata Personal E-mail: [email protected] Information: Web: http://www.cs.cmu.edu/~drl/ Home Address: 79 Merit Ln. Princeton, NJ 08540 Mobile Phone: +1 (412) 889-0106 Academic Institute for Advanced Study 2012-2013 Background: Member. Post-doc for a year-long special program on Homotopy Type Theory. Carnegie Mellon University 2011-2012 Teaching Post-doctoral Fellow. Designed and delivered a new intro. course, Principles of Functional Programming. Carnegie Mellon University 2004 to 2011 PhD in Computer Science. Advised by Robert Harper. Brown University 2000 to 2004 Bachelor of Science in Mathematics and Computer Science. Awards & FoLLI E.W. Beth Dissertation Award, 2012 Winner Fellowships: CMU SCS Dissertation Award, Honorable Mention, 2011 Pradeep Sindhu Computer Science Fellowship, Carnegie Mellon University, 2009-2010. Finalist for Computing Research Association Outstanding Undergraduate Award, 2004. Funding Cowrote NSF Grant CCF-1116703: Foundations and Applications of Higher-Dimensional Type Theory, which funded part of my post-doc. Cowrote NSF Grant CCF-0702381: Integrating Types and Verification, which funded part of my dissertation work. Publications: Dissertation Dependently Typed Programming with Domain-Specific Logics. February, 2011. Committee: Robert Harper, Frank Pfenning, Karl Crary, Greg Morrisett Journal Articles Robert Harper and Daniel R. Licata. Mechanizing Metatheory in a Logical Framework. Journal of Functional Programming. 17(4-5), pp 613-673, July 2007. Conference Papers Calculating the Fundamental Group of the Circle in Homotopy Type Theory. Daniel R. Licata and Michael Shulman. IEEE Symposium on Logic in Computer Science (LICS), June, 2013. Canonicity for 2-Dimensional Type Theory. Daniel R. Licata and Robert Harper. -
Graduation – Tuesday 3 December 2013
GRADUATION – TUESDAY 3 DECEMBER 2013 Chancellor, by authority of the Senate, I present to you this person on whom the Senate desires you to confer the honorary degree of Doctor of Science: Simon Peyton Jones Simon Peyton Jones is one of the stars and intellectual leaders of UK computer science research. He is a principal researcher at Microsoft Research in Cambridge, where he has worked since 1998. His main research interest is in functional programming languages, their implementation, and their application. For the uninitiated, functional programming is a style of programming in which programs can be regarded as mathematical functions, with properties that make it easy to reason about programs' behaviour and correctness. Simon is particularly interested in lazy functional programming, which sounds much more slothful than it really is. Laziness in this context refers to the evaluation of function arguments only when they are actually needed. Simon has led a succession of research projects focused around the design and implementation of production-quality functional-language systems for both uniprocessors and parallel machines. He was a key contributor to the design of the now-standard functional language Haskell, and was the lead designer of the widely- used Glasgow Haskell Compiler (known as GHC). He has written two textbooks about the implementation of functional languages. He is also a co-creator of the C-- programming language, designed for intermediate program representation between the language-specific front-end of a compiler and a general-purpose back-end code generator and optimiser. C-- is used in GHC. Simon has received several international awards in recognition of his research: for example in 2004 he was inducted as a Fellow of the Association for Computing Machinery (the premier international computing science body); in 2011 he received membership in the Academy of Europe; and in the same year he was awarded the SIGPLAN Programming Languages Software Award, a prestigious international award, for his joint work on GHC. -
Chung-Chieh Shan 單中杰 Luddy Hall, Room 3018 (812) 856-4400 Phone 700 N
Chung-chieh Shan ®-p Luddy Hall, Room 3018 (812) 856-4400 phone 700 N. Woodlawn Avenue (812) 855-4829 fax Bloomington, IN 47408-3901 [email protected] Associate Professor, Department of Computer Science, Indiana University (2019–) Assistant Professor, Department of Computer Science, Indiana University (2013–2019) Researcher, Department of Computer Science, University of Tsukuba (Spring 2012) Visiting Assistant Professor, Department of Linguistics, Cornell University (Fall 2011) Assistant Professor, Department of Computer Science and Center of Cognitive Science, Rutgers University (2005–2011) Research I study what things mean that matter. I work to tap into and enhance the amazing human ability to create concepts, combine concepts, and share concepts, by lining up formal representations and what they represent. To this end, in the short term, I develop programming languages that divide what to do and how to do it into modules that can be built and reused separately. In particular, I develop so-called probabilistic programming languages, which divide stochastic models and inference algorithms into modules that can be built and reused separately. In the long term, I hope to supplant first-order logic by something that does not presuppose a fact of the matter what things there are, though there may be a fact of the matter what stuff there is. Teaching Introduction to computer science (BL CSCI C211, Fall 2017, Spring 2018, Fall 2018, Spring 2019, Fall 2019) Probabilistic programming (Invited course at the Scottish school on programming languages -
Philip Wadler
Philip Wadler School of Informatics, University of Edinburgh 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND [email protected] http://homepages.inf.ed.ac.uk/wadler/ +44 131 650 5174 (W), +44 7976 507 543 (M) Citizen of United States and United Kingdom. Born: 1956 Father of Adam and Leora Wadler. Separated from Catherine Lyons. 1 Education 1984. Ph.D., Computer Science, Carnegie-Mellon University. Dissertation title: Listlessness is Better than Laziness. Supervisor: Nico Habermann. Committee: James Morris, Guy Steele, Bill Scherlis. 1979. M.S., Computer Science, Carnegie-Mellon University. 1977. B.S., Mathematics, with honors, Phi Beta Kappa, Stanford University. Awards National Science Foundation Fellow, three year graduate fellowship. 1975 ACM Forsythe Student Paper Competition, first place. 2 Employment 2003{present. Edinburgh University. Professor of Theoretical Computer Science. 2017{present. IOHK. Senior Research Fellow, Area Leader Programming Languages. 1999{2003. Avaya Labs. Member of Technical Staff. 1996{1999. Bell Labs, Lucent Technologies. Member of Technical Staff. 1987{1996. University of Glasgow. Lecturer, 1987{90; Reader, 1990{93; Professor, 1993{96. 1983{1987. Programming Research Group and St. Cross College, Oxford. Visiting Research Fellow and ICL Research Fellow. Awards Most Influential POPL Paper Award 2003 (for 1993) for Imperative Functional Programming by Simon Peyton Jones and Philip Wadler. Royal Society Wolfson Research Merit Award, 2004{2009. Fellow, Royal Society of Edinburgh, 2005{. Fellow, Association for Computing Machinery, 2007{. EUSA Teaching Awards, Overall High Performer, runner up, 2009. 1 3 Research overview Hybrid trees yield the most robust fruit. My research in programming languages spans theory and practice, using each to fertilize the other. -
ICFP Programming Contest 2019 Worker-Wrappers Against Bit Rot Version 1.0
ICFP Programming Contest 2019 Worker-Wrappers against Bit Rot Version 1.0 ICFP Programming Contest Organisers June 21, 2019, 10:00am UTC 1 Introduction With the tremendous success of functional programming in industry, it has been projected that by the year 2030 most of the code in the world will be written in functional languages using lambdas. To cater to the growing need for lambdas, in 2012 the ICFP contest participants have developed procedures for lifting this precious resource from mines in Scotland.1 Since then, lambdas have been excavated from mines all over the world, and in 2017, ICFP contestants came up with optimal ways to deliver lambdas to users via advanced punting strategies.2 The accelerated mining and delivery of lambdas allowed us to get rid of most legacy code — the infamous bit rotting problem was solved once and for all. However, eliminating legacy code creates a new problem: how to dispose of all the bit-rotten software? A plan has been devised to store it in the empty mines the lambdas were originally extracted from, which can now be converted into legacy waste silos. To prevent bit rot from seeping into the soil, the mines, before they are turned into silos, need to be insulated by wrapping their entire surface in a decay-containing substance. To perform this task, scientists have designed robots called worker-wrappers. This year, we ask the ICFP commu- nity to help dispose of bit-rotten software by programming worker-wrappers. The goal of this contest is to determine, for a number of empty mines, the most ecient way to insulate them. -
SIGPLAN Makes Several Awards Based on Nominations From
SIGPLAN makes several awards based on SIGPLAN Awards CRA-W Board as a Regional Mentor, organizer of the nominations from SIGPLAN Members — which CRA-W Programming Language Summer School and means that you can and should make a CRA-W Workshops on programming languages, operating The winners of the 2011 Software Award The winner of the 2011 Outstanding systems, and architecture. Kathryn has served on the nomination! Nominations are accepted at any are Simon Peyton Jones and Simon Marlow Doctoral Dissertation Award is program committees of SIGPLAN's ASPLOS, PLDI, th time; those received by 5 Jan are considered for the Glasgow Haskell Compiler. Robert L. Bocchino, whose dissertation An OOPSLA, CGO, MSP, and ISMM conferences, and non- for the awards of that year. SIGPLAN conferences such as PACT (for which she was Simon Marlow and Effect System and Language for Deterministic- also program chair), SIGMETRICS, CC, ICPP, and ISCA. The winner of the 2011 Programming by-Default Parallel Programming was Languages Achievement Award is Sir Charles completed at the University of Illinois at As a measure of her mentoring skills, Kathryn's students Antony Richard Hoare, FRS, FREng, FBCS. Urbana-Champaign. His advisor was Vikram have also distinguished themselves by winning prestigious Adve awards such as SIGPLAN's Outstanding Doctoral Tony Hoare's long career in Dissertation Award, PLDI's Student Research computing is studded with This dissertation makes Competition, and several Best Presentation awards at seminal engineering and several significant SIGPLAN conferences. They have also won prestigious scientific contributions to contributions to the field of graduate Research Fellowships from Microsoft, Intel, Programming Languages; his parallel and concurrent Samsung, and the National Science Foundation.