Sergey Tihon's Blog

F# Weekly #46, 2018 – One year of SAFE and pre-order of “Stylish F#”

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

At #FableConf/@RemmidemmiConf we were celebrating one year anniversary of @safe_stack. One amazing year with so many good things happening in the OSS projects and yet another year within a fantastic community. Thank you! #fsharp

— Steffen Forkmann (@sforkmann) November 15, 2018

Videos & Slides

F# Object Expressions – Language Essentials Series – Dave Thomas
Lambda World 2018 – A developer’s guide to probabilistic programming – Evelina Gabasova
EasyAM2 Episode 4 – F# Coding DevLog – Daniel Markham
Building a Compiler with Immo Landwerth:
- Episode 7: if-, while- and for-statements

Blogs

Write your own Excel in 100 lines of F# – Tomas Petricek
Give me Monsters! (Part 6) – Mathias Brandewinder
F# spoiled me, or why I don’t enjoy C# anymore – Roman Liman
Why and what is formlets? – Mårten Rånge
Using MiniProfiler with FSharp – Akos Lukacs
Day 1 of functional programming for an OO developer – Gareth Reptons
React hooks in Fable – Florian Verdonck
Move NLP IKVM to F# .NET-Friendly – Tao Liu
Rhino Plug-in with F# – Ching-Hua Chen
Solving the “Euler Knight’s Tour” using F# – Elemar Júnior
Building a game using F# with Jamie Dixon

F# vNext

Open source projects

gsomix/fulma-todomvc – The TodoMVC app written in F#, using Fable, Elmish and Fulma

FWIW I've abandoned core async and rewritten Suave's internal using a simpler IO scheduler observing 3 times throughput. I hope to bring these changes into next Suave v3 @suaveio #fsharp

— ad3mar (@ad3mar) November 6, 2018

New Releases

Coming soon to .NET Core – the #fsharp #azure storage type provider. Thanks @tforkmann for a *lot* of help in getting the TP running on net core 🙂 pic.twitter.com/5RidOJkjNm

— Isaac Abraham (@isaac_abraham) November 12, 2018

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

Previous F# Weekly edition – #45, 2018

F# Weekly #45, 2018 – Anonymous records became part of F#

Welcome to F# Weekly,

A roundup of F# content from this past week:

Second batch of extra slots for #FsAdvent is filled (Dec 11 – Dec 17), the third batch is unlocked (Dec 2 – Dec 10). Nine new extra slots awaiting their authors #fsharp (We are close to 3 per day) https://t.co/rFGop9sLKu

— Sergey Tihon (@sergey_tihon) November 5, 2018

News

Videos & Slides

Introduction to Metaprogramming with F# and Quotations – Dave Thomas
SAFE Stack Debugging in VS Code – Compositional IT
Building a Compiler with Immo Landwerth:
- Episode 6: Statements, Variables, and Scoping
F# and Fable – @mecusorin

Blogs

Building a .NET IDE with JetBrains Rider – Chris Woodruff
Understanding the Whys, Whats, and Whens of ValueTask – Stephen Toub
How to F# with Devon Burriss
- Part 9 – Working with databases in F#

F# vNext

[MERGED] [FS-1030] – Anonymous records
F# RFC FS-1066 – Add tryExactlyOne to array, list and seq
New language suggestions:
- if let expression

This just happened: https://t.co/AqvTiaR5XO #fsharp

— Steffen Forkmann (@sforkmann) November 6, 2018

Open source projects

FSharp.JsonSkippable – imple strong typing of whether JSON properties are excluded or null
G-Research/Teq – Type equality for F#

New Releases

Now you can play with the Tour of #fsharp by @_cartermp in the Fable REPL! https://t.co/BRDz9BfaRA pic.twitter.com/FdISH0ulCo

— Fable Compiler (@FableCompiler) November 6, 2018

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

Previous F# Weekly edition – #44, 2018

F# Weekly #44, 2018 – Fable Community Heroes and #FableConf / @RemmidemmiConf videos

Welcome to F# Weekly,

A roundup of F# content from this past week:

Congratulations to Fable Community Heroes 2018! Eugene Tomalchev, @zaid_ajaj, @k_cieslak and @dbrattli. Thanks a lot for all your contributions! pic.twitter.com/vT4MDTZJr3

— Fable Compiler (@FableCompiler) October 29, 2018

News

FableConf / RemmidemmiConf

User friendly apps start with dev friendly tools – Maxime Mangel (slides)
Future of web development with F# – Krzysztof Cieślak
Data visualization with Fable – Evelina Gabasova (slides)
Build a game with Fable in 45 minutes – Tomasz Heimowski
Azure Functions, Microsoft’s Glue in Serverless Architectures – Jan Fellien
Offline Progressive Web Apps with PouchDB – François Nicaise
Event Sourcing with Azure Cosmos DB – Roman Provazník
React performance in a Fable world – Julien Roncaglia
Azure Functions Deep Dive – Sia
Becoming a full stack developer, a quest into the unknown – Gien Verschatse (slides)
Domain Driven UI with SAFE Stack – Roman Sachse
Scaling Elmish Applications – Zaid Ajaj
La Chanson de FableConf

Videos & Slides

Two ways to include parameters in url using Suave.IO – Toni Lucca
Building a Compiler with Immo Landwerth:
- Episode 5: Line numbers and clean-up
Akka + F# = Akkling. .NET Fest 2018 – Vagif Abilov (RU)
One year of using F# in production at SBTech. .NET Fest 2018 – Антон Молдован. (RU)
Scaling CAP theorem for modern distributed systems. .NET Fest 2018 – Антон Молдован (RU)

Blogs

A Contract Pattern for Schemaless DataStores – Eirik Tsarpalis
F# Stanford NLP is running – Tao Liu
Partial Application in F# – Gareth Hubball
A Story Of Reliable Code – Artyom G
Machine Learning Monday – Kunjan Dalal
Safe Stack in Dokku – Kunjan Dalal
How to F# with Devon Burriss

F# vNext

Work in progress: #fsharp interactive with package management that runs on .NET Core. Syntax needs work, and there some bugs and usability issues in the IDE at the moment, so this won't be in the VS nightly feed for a while. pic.twitter.com/JyQvMAbLlW

— Phillip Carter (@_cartermp) November 1, 2018

Open source projects

Dzoukr/CosmoStore – F# Event store for Azure Cosmos DB and Azure Table Storage
dbrattli/Fable.Reaction – Fable.Reaction, Reactive (Rx) Elmish for F# and Fable
tpetricek/elmish-spreadsheet – Excel 365 in 100ish lines of F#
DevLyon/mixter – CQRS and Event Sourcing Koans
ArthurFSharp/ElmishWPFCognitiveServices – UWP / WPF Image recognition app written in F# and Fabulous and C# since we can’t access Universal Windows API in F#.

New Releases

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

Previous F# Weekly edition – #43, 2018

Anniversary edition of F# Weekly #43, 2018 – Six years together!

Welcome to F# Weekly,

This is an anniversary edition of F# Weekly, we are together for 6 amazing years! Thank you for reading F# Weekly and for all your contribution to the community.

but I already have at least 4 people without the slot. Should I extend number of slots this year? Please help me decide #fsharp #FsAdvent #FableConf

— Sergey Tihon (@sergey_tihon) October 27, 2018

A roundup of F# content from this past week:

News

Videos & Slides

How To “Dot” Into Anything, Anywhere, Anytime (Facilitating Data-First Programming) – Steven Taylor
Web UI Test Automation With A Functional Framework – Edgar Sanchez
Fast Neural Networks A No Brainer! The Actor Model As Neuron – Ricardo Terrell
Checkout new videos from Gareth Hubball
Taking Software Development Personal – Scott Nimrod
“Solving Rubik’s Cubes with F#” at FableConf – Stachu Korick
Data visualization with F# script files, Fable REPL and Recharts – Evelina Gabasova
Channel Reboot! – Dave Thomas
Building a Compiler with Immo Landwerth:
- Episode 4: Making testing a blast

Blogs

Getting Started with AWS Lambda in F# – John Ruble
How to F# by Devon Burriss
Continuous deployment of SAFE apps on linux server – Jindra Ivánek
Getting a file piped to your dotnet app – Daniel Markham

F# vNext

Recently changed/merged RFC:

Open source projects

ArthurFSharp/ElmishWPFCognitiveServices – WPF Application in F# (Elmish.WPF) that communicate with cognitive services (Text analysis sentiments, …)

New Releases

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

Previous F# Weekly edition – #42, 2018

F# Advent Calendar in English 2018

Update 2018/10/29: The vote showed that there is a demand for extra F# Advent slots, so I am going to follow suggestion from Reed Copsey and add new slots in portions. We will start from slot for [Dec 18 – Dec 24] week, and when they are filled I will add slots for [Dec 11 – Dec 17], then for [Dec 2 – Dec 10] and finally [Dec 25-Dec 31].

F# Advent Calendar is a long tradition in F# community

F# Advent Calendar in English: 2017, 2016, 2015, 2014
F# Advent Calendar (in Japanese): 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010

that became an inspiration for C# Advent Calendar and for Q# Advent Calendar.

Advent 2018 is coming, this year we have 54 free slots. Please join, reserve a slot and spread your thoughts and love to F# with the community. A lot of amazing initiatives developed this year: F# 4.5, Fable2, Giraffe & Zebra, Fabulous, Saturn, TP SDK for .NET Core, FAKE 5, Early History of F#, Don Syme finally became F# Hero and much more!

Join F# Advent Calendar today!

Rules

Choose F# related topic for your blog post and reserve the slot on Twitter or leave a comment to this post. Please note that you do not have to announce the topic until the date (but you can).
Prepare a blog post in English
Publish your post on a specified date (according to the calendar)
Post the link to your post on Twitter with hashtags #fsharp and #FsAdvent.

Calendar

ID	Date	Author	Post Title
#01	Dec 02 (Sun)	Stachu Korick	WTF is WTF#?
#02	Dec 02 (Sun)	Steve Shogren	F# Domain Design: Interdependent Enums and Booleans
#03	Dec 03 (Mon)	A. Prooks	Orleans with F# story
#04	Dec 03 (Mon)	Andrew Olney	Fable Tekno – Use body tracking to drive music synthesis in the browser
#05	Dec 04 (Tue)	Abhijay Eshwar
#06	Dec 04 (Tue)	John Azariah	F# & Q# – A tale of two languages
#07	Dec 05 (Wed)	Ryan Riley	State Transitions through Sequence Diagrams
#08	Dec 05 (Wed)	Olya	Three.js + F# + Fable = ❤
#09	Dec 06 (Thu)	Dave Thomas	Building a CPU Emulator with Fable 2.1
#10	Dec 06 (Thu)	Willie Tetlow	A Christmas Classifier
#11	Dec 07 (Fri)	Jérémie Chassaing	Full F# Blog (Part 2)
#12	Dec 07 (Fri)	Edgar Sánchez Gordón
extra	Dec 07 (Fri)	Akos Lukacs	Strongly typed HTML templates with FSharp without a framework
#13	Dec 08 (Sat)	Devon Burriss	Review: F# unit testing frameworks and libraries
#14	Dec 08 (Sat)	Grzegorz Dziadkiewicz
#15	Dec 09 (Sun)	Chet Husk	The crafting of a Figurine, or how to make a library in the new Dotnet SDK world
#16	Dec 09 (Sun)	Jeremy Abbott	FAKE 5 Migration Cheat Sheet
extra	Dec 09 (Sun)	Adam Granicz	From enterprise to next-generation web: celebrating 11 years with WebSharper
#17	Dec 10 (Mon)	Mark Seemann	Danish CPR numbers in F#
#18	Dec 10 (Mon)	Clément Boudereau	Christmas Day 2018 weather forecast (5 next days)
extra	Dec 10 (Mon)	Gerard
#19	Dec 11 (Tue)	Dustin Moris Gorski	Why you should learn F#
#20	Dec 11 (Tue)	Jimmy Byrd	(Ab)using Disposables for Integration Testing
extra	Dec 11 (Tue)	TK, Open Sourceror
#21	Dec 12 (Wed)	Dave Lowe	F# Fantasy Football
#22	Dec 12 (Wed)	Tonino Lucca	Porting a simple toy app to Elmish
extra	Dec 12 (Wed)	Paweł Stadnicki	Smart City solutions with Fable/F# (Part I)
#23	Dec 13 (Thu)	John Stovin
#24	Dec 13 (Thu)	Gareth Hubball	Streaming F#
extra	Dec 13 (Thu)	Garth Fritz	Getting My Team Hooked on FAKE
#25	Dec 14 (Fri)	Tomasz Heimowski	SAFE Template – a year retrospective
#26	Dec 14 (Fri)	Anthony Lloyd	MapSlim – From DictionarySlim to Fsion
extra	Dec 14 (Fri)	Chris Roff	Functional BDD
#27	Dec 15 (Sat)	davidglassborow	Answering the phone, functionally, again
#28	Dec 15 (Sat)	Luis Quintanilla	The Case for Doing Machine Learning with F#
extra	Dec 15 (Sat)	Paweł Bańka	Functional imperative, functional declarative
#29	Dec 16 (Sun)	Tomasz Jaskuλa	Parallel Scan Left in F#
#30	Dec 16 (Sun)	Dag Brattli	Reactivity in F#
extra	Dec 16 (Sun)	Maxime Mangel	My tips for working with Elmish
#31	Dec 17 (Mon)	Kunjan Dalal	Tensorflow with Fable-Elmish. A Failed Try
#32	Dec 17 (Mon)	Tamizh Vendan	Model Binding in Suave and Saturn
extra	Dec 17 (Mon)	Gien Verschatse	My F# aesthetics
#33	Dec 18 (Tue)	Reed Copsey, Jr.	2018 Christmas Trees – Cross Platform Edition using Avalonia
#34	Dec 18 (Tue)	Justin Hewlett	Where’s my Early Return?
extra	Dec 18 (Tue)	Bob Millar
#35	Dec 19 (Wed)	Roman Provazník	Event Sourcing – Step by step in F#
#36	Dec 19 (Wed)	Florian Verdonck	Writing a VS Code extension with Fable 2.1
extra	Dec 19 (Wed)	Jamie Dixon	Animations in Xamarin Forms (XF)
#37	Dec 20 (Thu)	Scott Wlaschin	Why F# is the best enterprise language
#38	Dec 20 (Thu)	Mikhail Shilkov	A Fairy Tale of F# and Durable Functions
extra	Dec 20 (Thu)	Brett Rowberry	My Path to F#
#39	Dec 21 (Fri)	Evgeniy Andreev	Shortest introduction to the compiler design
#40	Dec 21 (Fri)	Dave Shaw	Santa’s Xmas List in F# and Fable
extra	Dec 21 (Fri)	Leandro Miranda
#41	Dec 22 (Sat)	Caio Proiete
#42	Dec 22 (Sat)	Eriawan Kusumawardho	F# state in December 2018
extra	Dec 22 (Sat)	The Whitetigle	Even more interop with Fable
#43	Dec 23 (Sun)	Roman Sachse	Event Sourcing – Do it yourself
#44	Dec 23 (Sun)	Riccardo Terrell	How to parse a high rate stream of data with low memory allocation
extra	Dec 23 (Sun)	‏MokoSan	An Introduction to Probabilistic Programming in FSharp
#45	Dec 24 (Mon)	Jim Bennett	Fabulous Santa Tracker
#46	Dec 24 (Mon)	Ashish Vegaraju	Function Purity in F#
extra	Dec 24 (Mon)	Indy Garcia	Evolutionary Hyper Parameter optimisation with FSharp, Keras/Tensorflow
#47	Dec 25 (Tue)	Isaac Abraham	Parsing Excel with F#
#48	Dec 26 (Wed)	Jindřich Ivánek	My F# space adventure
#49	Dec 27 (Thu)	Jason Down	CodinGame Contests Meet F#
#50	Dec 28 (Fri)	Jack Fox	Type All the Things
#51	Dec 29 (Sat)	Eelco Mulder	Why I like F# over C# – Less Noise
#52	Dec 30 (Sun)	Mikhail Smal	Navigation with Fable.Elmish
#53	Dec 31 (Mon)	Kai Ito	Fable React is nice. But what about Fable Preact?
#54	Jan 01 (Tue)	FSSF	Welcome to 2019!

F# Weekly #42, 2018 – Zander, Fantomas and Extending F#

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Videos & Slides

DotNet Rocks:”Coding Haskell and F#” – with guest Daniel Chambers
Extending F# through Computation Expressions – Ryan Riley
Dependency Injection, Unit Testing, C# vs F# – Mark Seemann at NDC Sydney 2018
F# and some Websocket fun – wrapping a low-level C# Library. – Gareth Hubball
F# Websockets, Xamarin Forms and tonight: Something might work! – Gareth Hubball
F# Friday Fundamentals. – Gareth Hubball
localization using FSharp.Data.Xsd type provider – Toni Lucca
Building a Compiler with Immo Landwerth:
- Episode 3: Assignments & Variables

Blogs

Up and running with PAKET – Devon Burriss
Black-Scholes-Merton, F# and AVX2 – #2 – Franco Tiveron
F# Scripts – Devon Burriss
Using Generic Type For Type Casting In F# – Ehsan Ghanbari
Developing a F# Console App Using Hopac, Logary, and Expecto – Daniel Markham
Efficiently At: Fitting Active Workset and Element’s Workset – Ching-Hua Chen
Music with F#: The Language and the Note – Leo Cavalcante

F# vNext

Recently changed/merged RFC:

Update: I came out victorious in the end; there’s now an F♯ .sublime-syntax derived from @IonideProject’s JSON-tmLanguage files. The PR for Gutenberg is here: https://t.co/nZuRmkthE5 (The work *may* also land in the @sublimehq #fsharp package, if the maintainers are interested.) https://t.co/9jtB2ZIjO2

— Chris Krycho (@chriskrycho) October 13, 2018

Open source projects

fsprojects/Zander – Regular expression for matrix information. I.e. parse structured blocks of information from csv or excel files (or similar 2d matrixes)
AnthonyLloyd/Fsion – Power from bringing together datums, the atoms of data. EAVT (Entity, Attribute, Value, Time) database for F#

New Releases

Look at what's already in nightly @JetBrainsRider! pic.twitter.com/SMY0v2PlXh

— Vasily Kirichenko (@kot_2010) October 16, 2018

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

Previous F# Weekly edition – #41, 2018

F# Weekly #41, 2018 – ML.NET 0.6 and open source of Infer.NET

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Small victory! 1st example from #InferNET hosted on @AzureNotebooks. https://t.co/DriDhTR4yj "Two Coins". Now with the revised https://t.co/TGitRgMaHi.Probabilistic namespace. Used Paket.GitHub to get FSharpWrapper. @dovgalec @c4fsharp @evelgab @dsyme Thanks @MSFTResearchCam.

— Ian (@r0guetrainer) October 12, 2018

Videos & Slides

F# Fundamentals & Xamarin – Gareth
F# and Suave.Io: passing parameters to javascript – Toni Lucca
Building a Compiler with Immo Landwerth:
- Episode 1: A basic expression evaluator
- Episode 2: More operators

Blogs

Open Source Documentation – Dustin Moris Gorski
Filter Selected Elements by Category – Ching-Hua Chen
Functional way to build modern web solutions with F# Safe Stack – Luteceo
A Year in Clojure (updated) – Taylor
Synchronize Section Box – Ching-Hua Chen
F# and Elasticsearch – codesuji
SAFE stack on Ubuntu 18.04 from scratch – Atle Rudshaug
Music with F#: The Language and the Note – Leo Cavalcante

F# vNext

I find my first #fsharp compiler bug in eight years of intensive use, and it's been fixed the following morning. That's quality. (Nice one @sforkmann!) https://t.co/qwchJ1TkkG

— Kit Eason (@kitlovesfsharp) October 9, 2018

Open source projects

fsprojects/OpenAPITypeProvider – F# type provider for Open API specification
enkomio/sacara – Sacara VM (A stack based intermediate language aimed at software protection by running in a software VM)

ncave is killing me. Apparently there's already a project to compile Typescript to WebAssembly, Fable 3 compiling to wasm is closer now… but it won't happen this year 😉 https://t.co/PbrU8D3jIO

— Alfonso Garcia-Caro (@alfonsogcnunez) October 11, 2018

New Releases

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

Previous F# Weekly edition – #40, 2018

F# Weekly #40, 2018 – Stylish F#, Infer.NET, Fable 2, Blazor 0.6, .NET Core 3.0, VS 2019

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

My new book, 'Stylish F#' is 'text complete'. Not sure if the release date shown here is correct, but maybe keep your Xmas list open just in case! 😉 https://t.co/cn9Qti2ml4 #fsharp

— Kit Eason (@kitlovesfsharp) October 2, 2018

Videos & Slides

Co-Recursive Interviews #020 – Concurrency and FP with Riccardo Terrell
Live Programming in F# (vol. 2) – Scott Nimrod
F# and Xamarin development – Steamdeck replacement?? – Gareth Hubball
Ordering System – Toni Lucca
You Got Logic in my Functional Programming! – Dave Curylo
Building Fabulous mobile apps with F# – Jim Bennett

Blogs

Azure Functions and Azure Storage: secure authentication with Managed Identities and without managing keys! – Lena Hall
REST API with MongoDB and F# on .NET Core – Leo Cavalcante
Unboxing and Exploration – Mafinar Khan
Writing to Azure Storage With F# – Larry O’Brien
A History of .NET Runtimes – Matt Warren
Open F# 2018 – bretthall
Static code analysis in Javascript: verifying correctness of pattern matching – Zaid Ajaj
Black-Scholes-Merton, F# and AVX2 – #1 – Franco Tiveron
Immutability in .NET – Eowind

F# vNext

New ideas:

Open source projects

ronaldschlenker/FsHttp – A lightweight F# HTTP library.
FsToolkit.ErrorHandling – utility library to work with Result type in F# to do error handling.
Prolucid/FsShelter – Author Apache Storm topologies with F# using statically-typed streams

Latest TypeProviders Template supports build on macOS/Mono for net45 runtime #fsharp https://t.co/UCfz5TKAHO
Just install and try it:
1) dotnet new -i FSharp.TypeProviders.Templates
2) dotnet new typeprovider -n LemonadeProvider -lang F#

— Sergey Tihon (@sergey_tihon) October 1, 2018

New Releases

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

Previous F# Weekly edition – #39, 2018

F# Weekly #39, 2018 – The Early History of the F# Language

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Congratulations to @MangelMaxime, @ncave, @dsyme, and @selketjah, your 2018 Community for #fsharp #heroes!

— Community for F# (@c4fsharp) September 28, 2018

Videos & Slides

Blazing New Trails with Web Assembly – Ryan Riley

Blogs

How Microsoft rewrote its C# compiler in C# and made it open source – Mads Torgersen
F# Enum’s Usage – Tao Liu
Update on C# and F#’s Default Interface Methods – Jonathan Allen
Using F# in Godot 3 – Lars Kokemohr
Functional Domain Modeling – Ashish Vegaraju

If you're into Javascript or..NET and in Europe, come to Berlin for FableConf/RemmiDemmi in October. See you there! https://t.co/ZqWuVBdUKg

— Don Syme (@dsyme) September 26, 2018

F# vNext

New ideas:
- Allow types to be spliced into a typeof keyword to make reflection and meta-programming easier
- Fsc can manipulate AST at compile time (wanna approve)

Open source projects

dustinmoris/CI-BuildStats – Little SVG widget to display AppVeyor, TravisCI, CircleCI or Azure Pipelines build history charts and other SVG badges.
panesofglass/computation-expressions-workshop – F# Computation Expressions Workshop

New Releases

We have shipped a new version of @FableCompiler REPL.

For this version, we focused on improving the user experience. We now have a console and problems panel, more settings, go to definition, better examples, added a CSS editor and more.https://t.co/YPzCRW7Gti pic.twitter.com/iCLgUv7Xe8

— Maxime Mangel (@MangelMaxime) September 26, 2018

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

Previous F# Weekly edition – #37-38, 2018