Sergey Tihon's Blog

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Call-to-action from Don Syme: Join the F# Foundation & help promote, protect, and advance the language!
• WebSharper goes Apache right now. v3.0 is coming.
• WebSharper migration to GitHub is completed!
• Tons of fun videos from NDC London (full list of talks).
• FAKE has 100 contributors and they managed to open the license.
• Akka.NET needs more F#’ers to eval our F# API.
• FSharp.Core now available on NuGet in a sane manner.
• Get up to 30 Pluralsight courses in your MSDN subscription.
• Do not miss “Introducing .NET Core“.
• Want F# IntelliSense support in LinqPad? Vote here.
• Matthew Moloney presented F# text editor in 3D with syntax highlighting.

Videos/Presentations/Courses

• The F# Way To Relaxation (slides) by Don Syme (there are some problems with audio)
• Railway oriented programming: Error handling in functional languages by Scott Wlaschin
• Write Your Own Compiler in 24 Hours (slides and code) by Phillip Trelford
• Equivalence Classes, xUnit.net, FsCheck, Property-Based Testing by Mark Seemann
• Mona Lisa, F# and Azure: simple solutions to hard problems by Mathias Brandewinder
• Functional programming design patterns (slides) by Scott Wlaschin (comming soon)
• Biological Computing in F# by Rasmus Petersen and Colin Gravill
• Actor-based Concurrency with F# and Akka.NET (+code) by Akim Boyko
• Above and beyond Python programming FSharp for Trading and Finance by Bryan Downing
• Understanding social networks with F# (slides & code) by Evelina Gabasova
• Event Sourcing by Michael Newton
• F#, this aint a game by Andrea Magnorsky (slides)
• Elixir Language, Concurrency, Iteration by José Valim
• My adventure with Elm by Yan Cui

This week from F# Advent Calendar in English

• FsCheck and property-based testing – Scott Wlaschin
• Snowflakes – Philae Trelford
• My Introduction to Data Science with F# – Jon Wood
• Distributing the F# Mailbox Processor – Isaac Abraham
• Decorating Immutable Christmas Trees – Richard Dalton
• Christmas F# Polymorphism – Steve Shogren
• Developing an Algorithm in F#: Fast Rotational Alignments with Gosper’s Hack – Richard Minerich

This week from F# Advent Calendar in Japanese

• Computation Expressions Tips – pocketberserker
• AutoOpenAttribute– htid46
• Introduction to ApiaryProvider – otf
• F# Project Scaffold: Getting started – yukitos
• 実例に見るSource変換活用術 – bleis-tift
• State in computation expressions– kos59125
• FSharpLint: Linter for F# code – k_dispose

Blogs

• Predicting Physician Gender Using AzureML and F# – Jamie Dixon
• Using F# and FFmpeg to take thumbnails from video – Erlend Wiig
• F(by) 2014: Photos and slides.
• Extending a 3rd-party API with F# units of measure – Lincoln Atkinson
• Generating Permutations: Clojure or F#: Part 2 – Boris Kogan
• Modelling Stochastically Independent Processes with F# Computation Expressions: Part 1 – Boris Kogan
• Being visually honest with F# – Yan Cui
• F# Functions Explained – Currying & Partial Application – Ankit Solanki

F# vNext News

• Schedule plans for the remainder of Visual F# 4.0 development.
• Recently accepted PRs:
  • non-nullable provided types
  • better ide feedback for tp bugs
• Recently proposed PRs (please review and comment):
  • provided extension members
  • alignment with github.com/fsharp
• Recently proposed ideas:
  • Support .NET Core and CoreCLR

New releases

• Paket 0.17.19.
• FSharp.CloudAgent 0.3
• WebSharper 2.5.134
• Stanford.NLP.* v3.5 and Stanford.NLP.Parser.Fsharp v0.0.9 using new IKVM for Java8.
• FSharp.Core 3.1.2
• FSharp.Configuration 0.4.6.
• FSharp.Control.Reactive 3.0.1
• R.NET F# Utility 0.1.11
• FSharp.Actor-logary 2.0.1
• EaToSql 0.0.5-alpha
• Chrisjdobson.WebSharper.SignalR 0.4.1
• Suave 0.19.1

That’s all for now. Have a great week.

Previous F# Weekly edition – #48

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Do not miss F# Advent Calendar: English and Japanese versions are starting today.
• Please help these F# projects achieve “green” status for cross-platform CI builds.
• FAKE most probably is the best .NET build system of today.
• If you’re feeling lonely, tweet #fsharp. You have 88% probability that someone will RT or favorite it.
• A new book: Machine Learning Projects for .NET Developers by Mathias Brandewinder.
• A new Type Provider opportunity: hal+json.
• Using FSharp.Data? If you can, please help Gustavo Guerra scale CsvProvider to 5GB+ files

Videos/Presentations/Courses

• Introduction to Machine Learning (Using R and F# with examples from Kaggle competitions) – by Akim Boyko
• All-round strongly-typed approach to MS CRM – Ramón Soto Mathiesen
• F# and Open Source – Andrea Magnorsky
• Streams – Nick Palladinos
• Modelling environment update for plankton study – Matthew Smith (The ecology group at Microsoft Research have been using F# to model the science of plankton)

Blogs

• An introduction to property-based testing – Scott Wlaschin (FsAdvent)
• Your application should be a pure function – Tomas Jansson
• What is Behind the Rendering Design of DotPdf? – Steve Hawley
• f(by) Minsk 2014 – Phil Trelford
• Sending SMS on NServiceBus in FSharp – Bjørn Einar Bjartnes
• Typed Hack of Cloudant using F# – Kunjan Dalal
• Generating valid F# source code for testing with FsCheck – Anh-Dung Phan
• Generating Permutations: Clojure or F#: Part 1 – Boris Kogan
• Working with Non-Compliant OWIN Middleware – Ryan Riley
• Introducing SourceLink.SymbolStore – Cameron Taggart
• Project reference resolution using FSharp.Compiler.Service – Robin Neatherway
• F#’s strongest year yet – Martin Trojer
• Evolution of the F# Empty WPF Template – Daniel Mohl

F# vNext News

• Recently accepted PRs:
  • set boundary for console.cursortop
  • use array.subunchecked in array.fs
  • document exceptions in array module
• Recently proposed PRs (please review and comment):
  • cleanup and file renames
  • converted readme to markdown format
  • implement seq.foldback2
  • use strongly-typed weakreference
• Recently proposed ideas:
  • Simplify assigning a mutable DU value

The F# Open Projects Group is looking for a primary active maintainer for the following repositories:

• fsprojects/Foogle.Charts
• fsprojects/FSharp.Collections.ParallelSeq
• fsprojects/FSharp.Compiler.CodeDom
• fsprojects/FSharp.Data.Experimental.XenomorphProvider
• fsprojects/FSharp.Data.HiveProvider
• fsprojects/FsLexYacc
• fsprojects/GraphProvider
• fsprojects/powerpack

New releases

• Paket 0.17.1.
• Math.NET Numerics for F# 3.3.0 (+signed version)
• FSharp.Quotations.Evaluator 1.0.4
• FAKE 3.10 released with support for MSBuild 14, couple of new MSDynNAV features and new csc.exe helper.
• EventStore.Client F# API 3.0.2
• FSharp.CloudAgent 0.2
• FSharp.TypeProviders.StarterPack 1.1.3.53
• Emacs F# mode v1.5.0.
• fsharp-mode (20141125.1614)

That’s all for now. Have a great week.

Previous F# Weekly edition – #47

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Thank you everybody who helped to raise an initial budget of FSSF!
• Join F# Advent Calendar 2014 & F# Advent Calendar in English 2014!
• Check out a brand-new Visual F# Power Tools FAQ.
• www.lambdadays.org is waiting for F# speakers!
• nugetmusthaves.com allows you to discover NuGet dependencies.
• Check out F#nctional Times – it’s very neat.
• Plans for .NET source code and Mono integration
• Eirik Tsarpalis works on QuotationCompiler library.

Videos/Presentations/Courses

• The F# Programming Language on TIOBE
• Detangling software dependency networks (+code) – Evelina Gabasova
• Introduction to FunScript (Spanish – Madrid F# Meetup)
• Type Providers (+code) – Michael Newton
• F#, this ain’t a game – Andrea Magnorsky
• Learn you to tame complex APIs with F#-powered DSLs – Yan Cui
• Functional Programming Patterns (BuildStuff ’14) – Scott Wlaschin
• Teaching programming language concepts with F# (Peter Sestoft) – part 1, part 2 & materials.

Blogs

• Seq vs Streams – Phil Trelford
• F# Named Union Fields – Gustavo Guerra
• FunSnake (code) – Alberto Ayuso
• F# FunScript with NancyFx and Ractive – Andre Van Der Merwe
• Implementing (Parts Of) ASP.NET Identity Using F# – Jamie Dixon
• I Saw My Reflection and Cried … – Dave Thomas
• Visual F# 4.0 Preview – Michael Domingo (Visual Studio Magazine)
• F# Type Providers – Hightech
• Fun with Code Diagnostic Analyzers – Dave Fancher
• Modeling Mars rovers with F# – Mark Watts
• Operator precedence: F# and Haskell – Kevin Cantù
• NuGet dependency visualizer with F# and Graphviz – Sergey Tihon
• Manage Azure Blobs with F# – David Crook
• F# Keyboard Bindings with AutoHotkey – TeaDrivenDev
• F# in ASP.NET 5: The good, the bad, and the really ugly – Aleksander Heintz
• Android Wear Starter Project – F# + Xamarin – Faisal Waris
• FAKE Everywhere – Ilker Cetinkaya
• Suave in a Docker container on MS Azure using Xamarin Studio and Mono on a Mac
• Hello World Suave – Henrik Feldt
• Expresiones de cálculo personalizadas – Alex Casquete
• Soirée FsiBot – Le bot twitter écrit en F# sur Azure – Michel Perfetti
• F#-Entwicklung für Visual Studio 2015 – das ist neu – Judith Lungstraß

F# vNext News

• F# project system now supports “up-to-date” builds!
• OSS folks Visual F# Team needs your help!!!! Please take time to review and comment on the PR’s they have yet to pull.
• Recently proposed PRs (please review and comment):
  • add support for try-with-finally
  • fix #29 – internal module reference
  • warnings are error
• Recently proposed ideas:
  • Add a get! or !! operator to computation expressions
  • Add an effect system
  • Scala like ‘case class’ feature in ‘type’ definition
  • Add try-with-finally for consistency

New releases

• FSharp.Compiler.Service v0.0.80
• Paket 0.16.0-alpha001.
• FSharp.Data.SqlClient v1.4.5.
• FSharp.Quotations.Evaluator v1.0.3
• FSharp.Data.SqlClient v1.4.5
• Nu Game Engine v0.993
• CloudSharper 0.9.22.2

That’s all for now. Have a great week.

Previous F# Weekly edition – #46

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Announcing a preview of Visual F# 4.0 on VS 2015.
• Announcing .NET 2015 Preview: A New Era for .NET.
• .NET Core is Open Source.
• A fantastic day for Visual F# – VS Community Ed. supports extensibility, so you can use Visual F# PowerTools on free stack.
• What do you want from the F# Software Foundation? Ask them here.
• F# group in Utah was announced.
• “Onikira, Demon Killer” – a game with an F# inside.
• Added is a section to “Recommended Guidelines for F# Projects” on cultural processing of strings.
• FeldSpar – F# test framework with a new UI test runner.
• Rachel Reese will join Jet.com in Jan.
• We need a type provider for JSON-LD.
• Type providers meet MBrace.
• The dependency manager Paket lets your project reference GitHub source as well as NuGet packages.
• Interactive web development with jQueryUI & WebSharper.
• Support for VS2015 preview included in the latest release of FSharpLint.
• FSharpSupport for ASP.NET vNext is on NuGet.

Videos/Presentations/Courses

• .NET 2015 & Managed Languages.
• Introducing F# For The Enterprise – Lincoln Atkinson.
• Taming GPU Threads with F# and Alea GPU – Dr. Daniel Egloff.
• Type providers (from the very beginning to the implementation) – Sergey Tihon.
• F# Streams – Gian Ntzik.
• Programming Games in F# – Andrea Magnorsky.

Blogs

• Does the Paradigm You Use Make a Difference? – Simon Cousins.
• Blogging with F# on GitHub Pages – Colin Bull.
• Adopting F# in a C# Shop – Jamie Dixon.
• Introducing Cricket (formerly FSharp.Actor) – Colin Bull.
• Introducing FsReveal – Beautiful, version controlled presentations in the browser – Steffen Forkmann.
• Self-hosted WebSharper application template available – WebSharper Core Team.
• Month of spreading F# love in Poland – Michał Łusiak.
• F# script reminder – Robert Nielsen.
• Progressive F# Tutorials London 2014 – Phil Trelford.
• Suave in a Docker container on MS Azure using Xamarin Studio and Mono on a Mac – Sebastian Fialka.
• Functional languages rack up best scores for software quality – Paul Krill.
• Solution to the prisoner puzzle

F# vNext News

• Recently accepted PRs:
  • Mutable values can be captured by closures now
  • Constructors are now treated as first-class functions
  • Better stack traces for async code.
  • Static arguments on provided methods
• Recently proposed PRs (please review and comment):
  • implement nameof operator
  • [prototype] [wip] local opens
  • fsharptest template projects
  • use array.subunchecked in array.fs
  • add nonstructuralcomparison ops
  • add tryunbox, isnull and option fns
  • cleanup referenceresolution.fs/fsi
  • add the multiprojectwizard
• Recently proposed ideas:
  • Display current parameter type in tooltip for generic function
  • Allow for completely in-memory compilation
  • Extended augmentations for functional types
  • Consider implementing static mixins to make the functional style more convenient in F#
  • add possibility to use custom hash code generation for types

New releases

• Paket 0.14.1 with new find-refs command, support for linking of HTTP files, better F# REPL support and use of Nuget v3 API.
• FsPickler v1.0.4 with ExceptionDispatchInfo serialization support in the CLR.
• FSharp.TypeProviders.StarterPack v1.1.3.52.
• FSharp.Compiler.Service v0.0.79.
• fsharp-mode (20141111.906)

That’s all for now.  Have a great week.

Previous F# Weekly edition – #45

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Legally establishing the F# Software Foundation – FSSF needs your help.
• F# Advent Calendar 2014.
• FsReveal has just moved to fsprojects on GitHub.
• Elucidate – an alternative reading mode that renders markdown interspersed in code.
• XPlot – a data visualization package for F# powered by popular JavaScript charting libraries.
• Xamarin for Students is FREE.
• Prototyping FSharpSupport for ASP.NET vNext.
• BSON type provider was presented.
• mForex.API.FSharp – an official F# binding for mForex API.
• New type provider opportunity “JSON-LD Type Provider“.

Videos/Presentations/Courses

• Functionland: A Romance of Many Paradigms – Troy Kershaw.
• F# Introduction by Jorge Fioranelli.
• Реактивное Программирование Роботов с помощью Fsharp и Mono – Stas Fomin.
• F# on the Web. 0 to Production in 12 Weeks – Ryan Riley.
• A practical theory of language-integrated query – Philip Wadler.
• FSLAB: DOING DATA SCIENCE WITH F# – Tomas Petricek.
• TAKING YOUR CRAFT SERIOUSLY WITH F# – Tomas Petricek.

Blogs

• Loewensberg re-animated – Phil Trelford.
• Michael Newton presented his blog series “Typeprovider“.
• Recommended F# Beginner Resources – Mike Janger.
• Halloween Project (Garage Of Mystery) – Jamie Dixon.
• Blogging with F# on GitHub Pages – Colin Bull.
• Flux Compression (Redux) – Dave Thomas.
• F# Workshop: Learning a New Language – Mjolner.
• Ring probabilities in F#.
• Programming for Google Cardboard on iOS using F# – Larry O’Brien.
• Month of spreading F# love in Poland – Michał Łusiak.
• Puzzle: prisoners and switches.
• Safer Programming with F# – Pattern Matching –  Ankit Solanki.
• Running F# on a PlayStation Vita – Anthony Brown.

F# vNext News

• Recently accepted PRs:
  • printf units of measure
  • sortdescending and sortwith
  • implement windowed
  • implement unfold
  • implement list.truncate and array.tr
• Recently proposed PRs (please review and comment):
  • add f# web templates
  • add the multiprojectwizard
• Recently proposed ideas:
  • Properly print ‘None’ for option types from FSI
  • Avoid boxing when comparing value types
  • Allow parameterless constructors in structs
  • Add a Option.getOrDefault method as a curryable alternative to defaultArg
  • An CLIVirtual attribute
  • (structural subtype) polymorphism for discriminated unions [similar to polymorphic variants in OCaml]
  • Allow negative indices in indexing and slicing like python
  • Do not lock type provider dlls when compiling and by VS editor
  • Warn when literal attribute is used with lowercase name
  • Allow to declare new types inside functions
  • Code Contracts support

New releases

• Paket v0.13.0-alpha00 with FSI support.
• FAKE 3.9.0 with support of  Xamarin iOS archiving helper and x64 packages.
• FSPowerTools: v1.6.1 with Task List comments, major updates on Go to Metadata and many improvements.
• FSharp.Compiler.Service 0.0.76.
• FSharp.TypeProviders.StarterPack 1.1.3.50.
• Streams v0.2.5 with a new push/pull design and new pull-based combinators Stream.toSeq/zipWith.
• Aardvark.Base.FSharp v1.0.5.
• Accepted fsharp 3.1.1.26+dfsg2-3.
• Nu Game Engine Release v0.991.
• FSharp.Azure v1.0.1.

That’s all for now.  Have a great week.

Previous F# Weekly edition – #44