Sergey Tihon's Blog

F# Weekly #3, 2015

19/01/2015F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Visual F# is on GitHub !!!
FsReveal 0.3 now comes with reveal.js 3.0
Dallas F# User Group was presented.
Mikael Lundin is looking for technical reviewers for his book “Testing with F#”.
MBrace progress report
Roll-a-ball-FSharp – Unity 3d game engine tutorial

Videos/Presentations/Courses

Statistical Genomics using F# with Evelina Gabasova
Functional programming design patterns with Scott Wlaschin
Codemash 2015 – Ryan Riley
F# Expert Panel – Fountainhead Lab

Blogs

Visual F# has moved to GitHub – Visual F# Team
FnuPlot: Cross-platform charting with gnuplot – Tomas Petricek
SlideShow: Paket Introduction – Steffen Forkmann
Logic level parsing Rigol oscilloscope CSV data with F# – Andre Van Der Merwe
F# Record Types with Entity Framework Code-Last – Jamie Dixon
F#: Pattern matching on field literals – David Tchepak
Developer Day – A Day Dedicated To Learning New Things – Michał Śliwoń
F# Higher Order Functions (List) Part1 – Michael Coxeter
Data science with F# – Decision Mechanics
F# Project Loading – Liam McLennan
Format TypeScript with F# – Cameron Taggart
Fun with FunScript – Tobias Burger
Programming the Azure Active Directory with F# – Tomas Jansson
Using Serilog with F# Discriminated Unions – Nicholas Blumhardt
F# Higher Order Functions (List) Part2 – Michael Coxeter
Averages are not good enough (F#) – Jef Claes
My road to F# – Alessandro Melchiori

F# vNext News

New releases

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

Previous F# Weekly edition – #2

F# Weekly #2, 2015

12/01/201512/01/2015F# Weekly2 Comments

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

FsReveal has now a new FAKE target which allows you to deploy your slides to GitHub pages.
Visual F# PowerTools Tip: use “Ctrl Shift + Arrow Down/Up” to navigate between next/previous highlighted references.
Shared some inside about Jet.com.
Number of unique people tweeting about F# per day is increasing
Vote for F# support in add web jobs in Visual Studio (if you like an idea)
RProvider works on the Mac
F# is added to Stackshare

Videos/Presentations/Courses

Leveraging Functional Programming for Data Science – Richard Minerich
F# News – December 2014 – Hadi Eskandari
F# in social gaming (CodeMash 15) – Yan Cui
F# on the Web: 0 to Production in 12 Weeks – Ryan Riley (+code)

Blogs

Why your F# evangelism isn’t working – Eric Sink
RSDE positions at Microsoft Research, Cambridge – Don Syme
Concurrency, performance and F# – Mårten Rånge
F# Record Types With Entity Framework Code-First – Jamie Dixon
Using F# on a Raspberry Pi – Andre Van Der Merwe
Tweaking Sublime Text themes to take advantage of Retina displays on Windows – Nikos Baxevanis
Spelling checker in F# – Frank Joppe
In the Age of Web: Typed Functional-First Programming Revisited – Tomas Petricek, Don Syme
Fibanacci: Hopac vs Async vs TPL Tasks on .NET and Mono – Vasily Kirichenko
Why you should learn F# in 2015 (and how)? – Tomas Petricek
MonoGame, F# and Santa! – Greg Duncan
Mastermind, The Code Breaking Game – Richard Dalton
Working with Non-Compliant OWIN Middleware – Ryan Riley
FAKE Final Targets – Sergey Tihon
Recreating the Star Wars opening crawl in AutoCAD using F# – Part 1 – Kean Walmsley
Recreating the Star Wars opening crawl in AutoCAD using F# – Part 2 – Kean Walmsley
Recreating the Star Wars opening crawl in AutoCAD using F# – Part 3 – Kean Walmsley
Recreating the Star Wars opening crawl in AutoCAD using F# – Part 4 – Kean Walmsley
F# Match Expressions – Michael Coxeter
FSharp.Msisdn – Torbjørn Marø
Step-4 Build Automation Using FAKE – TamizhVendan
Fun with L-system – Mathias Brandewinder

F# vNext News

Visual F# and Roslyn will both be moving to GitHub next week!!!
First Visual F# Tools Preview of 2015 includes localized templates.
Recently accepted PRs:
Recently proposed RPs:
- compiler error msg fix
Recently proposed ideas:
- Add possibility to use break and continue in f# loops. And do while loop

New releases

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

Previous F# Weekly edition – #1

Today I discovered a new (for me) FAKE feature called FinalTarget. I worked on integration with our new product ReportPortal (in beta right now) that collects and visualizes test results and faced a problem …

The integration process is the following:

Start a new launch (test session) on the server
Execute all tests: unit & integration tests (in my scenario).
Close a launch on the server

As you see, I need to close a launch even in the case when tests failed. So I cannot stop an execution of build script directly on the failure. Unexpectedly, but FAKE provides an elegant solution for this scenario – FinalTarget (target that will be executed in any case if you activate it).

FAKE dependencies look like this in my script:

"Clean"
 ==> "RestorePackages"
 ==> "Build"
 =?> ("RP_StartNewLaunch", not <| hasBuildParam "skipTests")
 =?> ("RunUnitTests", not <| hasBuildParam "skipTests")
 =?> ("RunIntegrationTests", hasBuildParam "allTests")
 =?> ("RP_FinishLaunch", not <| hasBuildParam "skipTests")
 ==> "All"

Targets look like this:

Target "RP_StartNewLaunch" (fun _ ->
    ...
    ActivateFinalTarget "RP_FinishLaunch"
)

FinalTarget "RP_FinishLaunch" (fun _ ->
    ...
)

Target "RunUnitTests" (fun _ ->
    ...
)

Target "RunIntegrationTests" (fun _ ->
    ...
)

As you see, I defined FinalTarget instead of usual Target for “RP_FinishLaunch” and activated it on start of a new launch.

FAKE is awesome 😉

F# Weekly #1, 2015

05/01/2015F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

New FSSF membership site is live! Join the F# Software Foundation!
Participate in “Twitter Pulse #fsharp 2014“.
F# Advent Calendar 2014 has ended – read full English and Japanese versions.
F# Lint snippets is Online.
Code2014: What programming languages did you use during 2014? (If you’ve written any F# this year- tweet to show your use of F#)
Functional Track talks from NDC London 2014.
Donna Malayeri used to be part of the Redmond F# team, these days she is doing Azure fun stuff. Check it out.
The F# logo is now part of devicons v1.7!
New docs: How to get Windows Service Bus working with F# CloudAgent.

Videos/Presentations/Courses

Scott Theleman – Understanding F# Workflows Part 1 of 2

This week from F# Advent Calendar in English

Snowflakes — redux – Andrew Cherry
Deploying .NET code instantly using Vagrant – Eirik Tsarpalis
F# 2014 – A Retrospective and Call to Action – Reed Copsey, Jr.

This week from F# Advent Calendar in Japanese

スコープやオフサイドルール小話 – pocketberserker
F# Build Tools for Unity(ゲームのやつ) – UniFSharpのご紹介 – zecl
FsCheck と ScalaCheck とを見比べる – gab_km

Blogs

Using DocumentDB With F# – Jamie Dixon
Less Defects with F# Units of Measure – Jon Wood
Driving Xamarin’s Android Player from the Command Line – Greg Shackles
The 2014 F# Tour in numbers – Mathias Brandewinder
Using SQL Type Providers and FSharp.Charting to generate an email report with inline charts in F# – Brian
Reading List for F# Learning – Jorge Tavares
Type-safe reflection using F# quotations – Mårten Rånge
Duck Typing in FSharp – Frank Joppe
Step-3 PhoneCat Recommendation System Using F# Agents, SignalR and Rx – TamizhVendan
Adding New Items to a Pure F# ASP.NET MVC/Web API Project – Daniel Mohl
Foto einfügen von der Laptop Kamera – Functional Software

F# vNext News

Recently proposed ideas:
- Implement types within types
- Implement first-class lensing / lenses in F#

New releases

Paket 0.21.5
Visual F# Power Tools 1.7 New Year Edition.
FSharp.Formatting 2.5.0 compatible with the latest FSharp.Compiler.Service
FSharp.Data.SqlClient 1.5.6
FSharp.Management 0.2.0
F# Data Toolbox (Twitter) 0.3.0
MathNet.Numerics.FSharp 3.4.0
Fss 1.2.0 (F# Server – lightweight F# web server)
Nu Game Engine v0.996b
Stacks FSharp 1.3.3

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

Previous F# Weekly edition – #52

Twitter Pulse #fsharp 2014

02/01/201508/01/2015F#, F# Weekly7 Comments

Past two years, at the beginning of the year, I did a post where I have tried to sum up year results and find some interesting facts/stats from tweets:

2013: Twitter Pulse #fsharp 2013
2012: Rhythm of the F# Сommunity heartbeat

This year was really awesome, a lot of things happened:

Real cooperation between Visual F# Team and F# open source community
Legal entity for F# Software Foundation
New F# logo and branded new site.
Awesome F# Advent Calendar at the end of the year 😉
and many more…

There are so many things occurred, so I need your help to find everything that happened or changed this year.

Especially for this, I prepared a data set with tweets starting from Jan 1, 2013 that is available here, and ask you to help me analyze it.

How to start:

Download the data set & unzip an archive.
Download latest version of Fsharp.Data.
Copy-paste following code snippet:

#r @"..\packages\FSharp.Data.2.1.1\lib\net40\FSharp.Data.dll"
open FSharp.Data

type Tweets = CsvProvider<"fsharp_2013-2014.csv">
let tweets = Tweets.GetSample()

//TODO: Your awesome analytics here

My sample analysis:

As an example of what you can do with data, I prepared a calculation of people activity that shows who had more tweets this year.

tweets.Rows
|> Seq.filter (fun x -> x.CreatedDate.Year = 2014)
|> Seq.groupBy (fun x -> x.FromUserScreenName)
|> Seq.map (fun (group, items) ->
    (group, Seq.length items))
|> Seq.sortBy (fun (_, cnt) -> -cnt)
|> Seq.take 100
|> Seq.iter (fun (group, cnt) ->
    printfn "%s:%d" group cnt)

When you execute these rows you will get a statistical output in FSI with user names and number of tweets. You can copy this output to wordle.net and play with settings to visualize it in the nice way:
2015-01-02_1007

Please help me to observe data set and share your results with me on Twitter (@sergey-tihon). I will include your plots/charts in the end of this post. Thank you!

@sergey_tihon FYI… https://t.co/VyqPWmfJ8h – quick results of my experimenting with twitter pulse dataset

— Isaac Abraham (@isaac_abraham) January 2, 2015

@sergey_tihon Updated the gist… and here's some results 🙂 P.S. fsharp not included in the hashtag chart pic.twitter.com/K15jVxl80x

— Isaac Abraham (@isaac_abraham) January 2, 2015

@sergey_tihon how about which twitter clients the #fsharp community uses? 🙂 https://t.co/QqTZob6cBm pic.twitter.com/cjB4E6kMBj

— Adam Chester (@adamchester) January 3, 2015

The #fsharp community is growing: number of unique people tweeting about #fsharp per day is increasing @sergey_tihon pic.twitter.com/oGqvoqvc5A

— Evelina Gabasova (@evelgab) January 8, 2015

Average number of unique people tweeting about #fsharp per day was 44 in 2013,
in 2014 it was 82 https://t.co/wfr8bthhfn @sergey_tihon

— Evelina Gabasova (@evelgab) January 8, 2015

Deploying .NET code instantly using Vagrant

29/12/201429/12/2014F#Leave a Comment

The absolutely awesome post !!!

Eirik Tsarpalis' blog

This is post #30 of the English 2014 F# advent calendar. Thanks to Sergey Tihon for inviting me and suggesting the topic. Be sure to check out all the other awesome posts!

In this post I will be describing Vagrant, a dependency management library of mine. I will try to walk through some of the subtleties in the .NET framework that drove the library implementation, in an attempt to make it more accessible. All code and examples presented can be found in this repository.

Prelude

It is often claimed in functional programming that functions are treated as values. This is a valid assumption in simple applications, permitting powerful patterns when writing code. But is this a general truth, or simply a linguistic abstraction? If functions really are values, one would expect that they exhibit all properties normally expected of values. For instance, it should be possible to serialise functions…

View original post 1,027 more words

F# Weekly #52, 2014 – New Year Edition

29/12/201430/12/2014F# Weekly1 Comment

Welcome to F# Weekly,

Thank you to everyone who have been with F# Weekly all this year! Happy New Year to all of you and your families!

Last portion of news from 2014:

News

F# Deep Dives is available in print and mobile formats.
All videos from NDC London are available now.
Cameron Taggart prepared a list of differences “F# 3.0 vs F# 3.1” and “F# 3.1 vs F# 4.0“
F# room exists on JabbR.net.
CatVsDog – Azure OWIN F# Demo was presented.

Videos/Presentations/Courses

Polyglot heaven – how to build an async, reactive application in 2014 by Tomas Jansson

This week from F# Advent Calendar in English

Functional web synergy with F# and OWIN – Pete Smith
Seven ineffective coding habits many F# programmers don’t have – Yan Cui
Speaking computers for more fun ! – Jérémie Chassaing
The North Pole Type Provider: Escape from Santa’s Grotto! – Ross McKinlay
Nested looping to programmatic depth in F# – Lincoln Atkinson
Solving a Rubik’s Cube with F# – Stachu Korick
Make Santa Jump – Making an endless runner game in F# using MonoGame – Tim Jones

This week from F# Advent Calendar in Japanese

初心者がF#をUnityで使ってみた！ – むろほしりょうた
openした結果モジュールが被ってしまった場合でも両方のモジュールの関数を扱える – rika0618
文字列比較の罠 – htid46
FsCheckのこまごまとしたこと – pocketberserker
VisualStudioもF# も何も知らないズブの素人がLinux上でF# でHelloWorldしたメモ – kamekoopa
F# 製ユニットテスティングフレームワーク Persimmon について – pocketberserker
スコープやオフサイドルール小話 – pocketberserker

Blogs

F# for C# developers: Creating escaped concat/split functions in F# – Marc Sigrist.
OWIN-interface and SignalR-messaging – Tuomas Hietanen
On Tail Recursion – Juan M Gómez
Moving Files Between Azure Blob Storage Using F# – Jamie Dixon
Visualizing Deedle Series and Data Frames with XPlot – Taha Hachana
Step-2 Fsharp-PhoneCat Views Using Razor – Tamizh Vendan
Demystifying the Enigma machine with F# – Isaac Abraham
Patrones activos en F# – Alex Casquete
Wettbewerbsvorteil F# – Functional Software .NET

F# vNext News

First cut at .NETCore support for F#.

New releases

That’s all for now. Happy New Year and see you in the New 2015 Year!.

Previous F# Weekly edition – #51

F# Weekly #51, 2014

22/12/201422/12/2014F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

F# Deep Dives – final eBook is available now!
The new CloudSharper is out with WebSharper 3.0 support!
Your favorite F# book? Can you recommend a good beginner’s book for F#? Join discussions.
Deploying remote actors using Vagrant and Thespian. (It even works with custom types).
.NET projects using distribution can benefit considerably by using Vagrant.
WebSharper 3.0-alpha now has source maps for happier debugging.
Do not forget to subscribe to F# Show newsletter.

Videos/Presentations/Courses

Writing Compilers with Phil Trelford.
F# Show #1: The F# Software Foundation with Mathias Brandewinder, Andrea Magnorsky, Tomas Petricek, Phil Trelford and Scott Wlaschin

This week from F# Advent Calendar in English

Christmas Carol and other eigenvectors – Evelina Gabasova
Pure functional applications (in F#) – Tomas Jansson
Good times with F# – Mark Seemann
Modelling Inheritance With Inheritance – Michael Newton
Having fun with type-level numbers using a type-provider – Carsten König
Textogramme – Mathias Brandewinder
The Internet of Things at Scale with F# and Actors – Anthony Brown

This week from F# Advent Calendar in Japanese

アクティブパターンでアクティブになる – adacola
FsAttoparsecについて – pocketberserker
FsLab JournalでReproducible Research(レポート)を簡単に作りたい – teramonagi
継続は力なり – u_1roh
F#で謎カウンターを作るとき、let mutableでなくrefを使う（使っていた）のはなぜ？– komorebikoboshi
Linux で F# を始める – c0hama
Hindley-Milner型推論アルゴリズムをF#で書いてみた – pocarist

Blogs

Simon Cousins updated “Does the Language You Use Make a Difference (revisited)?“.
Review: F# Deep Dives – Sergey Tihon
Why F# became my goto language – Mårten Rånge.
Pure Functional Approach to the Visitor Pattern – Matthew Mcveigh.
On showing off vs fighting for adoption of functional languages – Bjørn Einar Bjartnes.
Refactored SMS sender – Bjørn Einar Bjartnes.
Scraping VZB network latency tables in F# – jnazario.
Functional Vs Imperative language paradigms – Aficionado.
Step 1 – Phonecat Backend Using Web Api and TypeProviders – TamizhVendan.
VDM-SL Example: Order Processing – Mataphor Engineering.
Generating App Screenshots Using Xamarin.UITest – Greg Shackles.

F# vNext News

Visual F# Team need your help here:
Recently accepted PRs:
Recently proposed RPs:
- fix for issue 201

New releases

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

Previous F# Weekly edition – #50

Review: F# Deep Dives

20/12/201420/12/2014F#2 Comments

Discount code: fshserb (39% off the eBook)

Some days ago, Manning published the final version of a new F# book: “F# Deep Dive“. I have read MEAP version of the book, and even had a chance to review the final one.

Book is written by the team of famous F# experts such as: Chris Ballard, Keith Battocchi, Colin Bull, Chao-Jen Chen, Yan Cui, Johann Deneux, Kit Eason, Evelina Gabasova, Dmitry Morozov, Don Syme and composed by Tomas Petricek and Phillip Trelford.

First of all, I want to mention that it is not a usual book about F# or another programming language. If you are novice to F# and looking for a guide of language constructs – this book is not the best choice for you. BUT, if you are already familiar with F# basic syntax constructs, can read simple F# code samples and want to see the language in action – this book is for you.

Book is organized as a collection of independent packages written by different authors. Each author tells his own story about F# application to a practical domain, shows how it was used, how it affected an application design and describes why it was done in such a way. Experts show an application of F# to financial and statistical models, internals of Fsharp.Formatting, numerical computing, social networks analysis, real-world usage of type providers, developing MVC application in idiomatic F#, power of F# Async in action, game development, social web apps in F# and many other interesting topics.

One problem with this book, at least for me, that it is difficult to read it cover to cover. Chapters are written by different authors in a different language, sometimes it was hard for me to catch a sense of computation in a completely new domain. So, for all future readers, I recommend to reorganize chapters according to interests and read parts that most valuable for you first.

Finally, I want to say that the book is really good. Everyone will find interesting topics and a new experience. You will get a broader vision of F# application in a real life. You will see how a functional approach can change and simplify the architecture of real life apps. If you are looking for what to read next – take a look at “F# Deep Dives“, this book is really deserves it.

If you want more F# books – visit fsharp.org.

Sergey Tihon's Blog

Running Home Assistant & Matter Server on a UGREEN NAS: A Deep Dive into Thread Device Commissioning

Pi-hole DNS on UGOS PRO 1.6.0.2917

F# Weekly | Behind The Scenes

New IKVM 8.2 & MavenReference for .NET projects

Announcing OpenXML Package Explorer for VS Code

`dotnet watch` with Microsoft.Identity.Web or custom IDistributedCache

ML.NET Recommendation Engine: Pitfall of One-Class Matrix Factorization

Introducing Clippit, get your slides out of PPTX.

HashiCorp Vault and TLS Certificate Authentication for .NET Applications (Comprehensive guide)

Be better WPF / MvvmLight developer in 2018

F# Weekly #3, 2015

F# Weekly #2, 2015

FAKE Final Targets

F# Weekly #1, 2015

Twitter Pulse #fsharp 2014

Deploying .NET code instantly using Vagrant

Prelude

F# Weekly #52, 2014 – New Year Edition

F# Weekly #51, 2014

Review: F# Deep Dives