swlaschin

Architecture

• Use Onion architecture

  • Dependencies go inwards. That is, the Core domain doesn't know about outside layers

• Use pipeline model to implement workflows/use-cases/stories

  • Business logic makes decisions
  • IO does storage with minimal logic
  • Keep Business logic and IO separate

• Keep IO at edges

SchlenkR

// This is am example of an immediate write / random access cursor for Excel with basic formatting options.
// Implementation is based on a concrete, non generic writer monad with no payload ("do!"" only) (only state).
// Instead of directl writing to excel, an alternatives would be a random acces to a 
// copy-on-write list (or even a mutable array) and then bulk-write the result to excel in one shot.
// When only forward access would have been required, a simple seq expression with yields would have been enough.
// Anyway, it is a demonstration on how to "hide" pseudo-mutable state that is passed through a computation.
// 
// I personally use it for generating reports based on various data sources.

jdh30

type Json =
  | Null
  | Bool of bool
  | Number of float
  | String of string
  | Array of Json list
  | Object of (string * Json) list

type Bracket = Open | Close

mathias-brandewinder

(*
Simulation of the Lorentz attractor, using Fable.
If you want to see this code in action, just copy this code into the Fable REPL:
https://fable.io/repl/
*)

module App

open Elmish
open Elmish.React

w0lya

    // ts2fable 0.0.0
namespace rec Fable.Three

open System
open Fable.Core
open Fable.Import.JS
open Fable.Import.Browser

module Three =
    

mrange

On the topic of tail calls in .NET

Let's say you have implemented a small data pipeline library to replace LINQ.

module TrivialStream =
  type Receiver<'T> = 'T            -> unit
  type Stream<'T>   = Receiver<'T>  -> unit

  module Details =

realvictorprm

open System
open System.IO
open System.Diagnostics

let downloadDependencies deps =
    Environment.CurrentDirectory <- __SOURCE_DIRECTORY__

    if not (File.Exists "paket.exe") then
        async {
            let url = "http://fsprojects.github.io/Paket/stable"

jesterKing

namespace GhFsharpTest

open Grasshopper.Kernel
open Grasshopper.Kernel.Types

type Priority() =
    inherit GH_AssemblyPriority()
    override u.PriorityLoad() =
        GH_LoadingInstruction.Proceed

alfonsogarciacaro

Deploying an F# ASP.NET Core app to Azure

Last week I spent a lot of time trying to deploy an F# ASP.NET Core app (a Giraffe app, specifically) to Azure because the information to complete all the steps was scattered in several places. So I'm writing this hopefully it will save the pain to others :)

Preparation

The following steps are mostly taken from this guide and it's only necessary to do them once:

1. Create an account in Azure (or use an existing one)
2. Create a resource group (or use an existing one)

imAliAsad

      /// <summary>
      /// Extract all family type properties data
      /// </summary>
      /// <param name="app"></param>      
      private MultiValueDictionary<string, Tuple<string, string>> ExtractFamilyParameterInfo(Application app)
        {

            //Open Revit Family File in a separate document
            var doc = app.OpenDocumentFile(FamilyPath);