F# Weekly #6, 2016

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Adding #fsharpconf to your F# meetup page is a great way to let your friends know
• Sign up to attend Community for F# virtual events.
• Ionide/Atom improved FsLab support
• “F# |> Kaggle” team participates in “Home Depot Product Search Relevance” competition.
• Welcome the Czech F# user group & Bangalore F# Meetup
• Lots of functional goodness proposed for C#7. Borrowing a lot from F# it looks like
• A cheatsheet for F#’s DSL-friendly features
• Microsoft Open Source Challenge for Students. Win $5000 for developing a project with F#

Videos/Presentations

• Functional Track talks from NDC Oslo 2015
• Ionide and F# OSS Presentation – Jared Hester

Blogs

• Interactive Coding with C# and F# REPLs (ScriptCS or the Visual Studio Interactive Window) – Scott Hanselman
• 10 Tips for Productive F# Scripting – Mathias Brandewinder
• The Jet Engine we built in 2015. – Louie Bacaj
• Project Euler — Problem 83 Solution – Yan Cui
• Upcoming user group talks in UK – Yan Cui
• Modeling answers [Desiderius part 6] – Fay-lee-nuh
• Building a Poker Bot: Card Recognition – Mikhail Shilkov
• F# Functions Explained – Currying & Partial Application –  Ankit Solanki
• F# – How to keep domain pure when logic depends on current date – Lauri Taimila
• F# For Beginners – Sacha Barbs
• Exercises in Programming Style–Introspective – Yan Cui
• Validation by types – Robin Ridderholt
• Item and Slice F# – Mike Harris
• Method chaining for Bootstrap components with WebSharper in F# – Kimserey Lam

Ernest Pazera coding corner

• The Joy of Functional GameDev Project 2 Episode 2
• The Joy of Functional GameDev Project 2 Episode 3
• The Joy of Functional GameDev Project 2 Episode 4
• The Joy of Functional GameDev Project 2 Episode 5
• The Joy of Functional GameDev Project 2 Episode 6
• The Joy of Functional GameDev Project 2 Episode 7

F# vNext News 

• If you’re developing a type provider and you want to make it target PCL-profiles please consider road-testing this
• Looks like F# might be losing its citizenship in the dotnet CLI tooling 😦
• What does Visual F# IDE Tools using Roslyn Workspaces mean for the future Visual F# Powertools and Ionide
• Revived: “[WIP] string interpolation“
• Recently proposed ideas:
  • Allow types and modules to be mutually referential (not across files, only within a closed scope in a single file)
  • extend ComputationExpression builders with Map : m<‘a> * (‘a -> ‘b) -> m<‘b>
• Features recently approved-in-principle by Don Syme:
  • Optionally relax signatures of -X, sin X, cos X to allow use w.r.t. subtyping
  • Allow implementation of abstract slots with generic return type instantiated at type ‘unit’
  • Expand support for byref to match C# 7
  • Catch improper use of monadic return in async
  • Make F# quotations and FSharp.Reflection usable with mscorlib and FSharp.Core for other target profiles
  • Add Result<‘Success,’Failure> to FSharp.Core
  • Add System.Collections.ICollection implementations to F# list/set/map
  • Make call syntax simpler for statically resolved member constraints
  • Allow access modifies to auto properties getters and setters
  • Cartesian product function for collections
  • Allow opening of static classes (matching the C# design)
  • Display current parameter type in tooltip for generic function
  • Properly print ‘None’ for option types from FSI
  • Accept integer literals like 12_345 for readability
  • Add StructOption<T>
  • Add support for StructTuple
  • Add string interpolation to println syntax (from Swift)
  • Add NameOf operator to follow C#/VB update

Open source projects

• Gluon – A type-safe remoting connector between an F# backend and a TypeScript client
• FsGll – A parser combinator library based on the GLL algorithm for F#
• Delegate.SPOcopy – A library that copies a local folder, including files and subfolders (recursively), to SharePoint Online, ensuring valid SharePoint relative url names.
• stockestimator – F# library for estimating future stock prices
• phutball-fs – Phutball game in F#
• fsraster – A simple image-processing and primitive-rendering app in F# and WPF

New Releases

• FSharp.Compiler.Service 2.0.0.4
• FSharp.Compiler.Service.ProjectCracker 2.0.0.4
• NamelessInteractive.FSharp.MongoDB v0.0.4
• fsharp-mode (20160205.700)
• LanguageExt.FSharp 1.7.20
• LanguageExt.Process.FSharp 1.7.20
• Trustpilot.FSharp.Flow 0.4.3
• Trustpilot.FSharp.Flow.Api 0.3.3
• FSharp.Automaton 0.2.0
• Persimmon 1.0.2

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

Previous F# Weekly edition – #5