yang-wei

Should be work with 0.18

Destructuring(or pattern matching) is a way used to extract data from a data structure(tuple, list, record) that mirros the construction. Compare to other languages, Elm support much less destructuring but let's see what it got !

Tuple

myTuple = ("A", "B", "C")
myNestedTuple = ("A", "B", "C", ("X", "Y", "Z"))

kadet1090

$script:bg    = [Console]::BackgroundColor;
$script:first = $true;
$script:last  = 0;

function Write-PromptFancyEnd {
    Write-Host  -NoNewline -ForegroundColor $script:bg

    $script:bg = [System.ConsoleColor]::Black
}

robert-stuttaford

(ns cognician.db.translate
  (:require [datomic.api :as d])
  (:import [clojure.lang MapEntry]
           [datomic.query EntityMap]))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Language

(def default-language :en-GB)

ploeh

module Tuple2

let replicate x = x, x

let curry f x y = f (x, y)

let uncurry f (x, y) = f x y

let swap (x, y) = (y, x)

ChrisPenner

After listening to the latest Magic Read-along episode "You should watch this" (which you should go listen to now) I got caught up thinking about Brian's idea of an Endomorphism version of Kleisli composition for use with Redux, it's actually a very similar model to what I'm using in my event framework for event listeners so I figured I'd try to formalize the pattern and recognize some of the concepts involved. IIRC Brian described the idea of a Redux-reducer, which is usually of type s -> Action -> s, it takes a state and an action and returns a new state. He then re-arranged the arguments to Action -> s -> s. He then recognized this as Action -> Endo s (an Endo-morphism is just any function from one type to itself: a -> a). He would take his list of reducers and partially apply them with the Action, yielding a list of type Endo s where s

evancz

A vision for data interchange in Elm

How do you send information between clients and servers? What format should that information be in? What happens when the server changes the format, but the client has not been updated yet? What happens when the server changes the format, but the database cannot be updated?

These are difficult questions. It is not just about picking a format, but rather picking a format that can evolve as your application evolves.

Literature Review

By now there are many approaches to communicating between client and server. These approaches tend to be known within specific companies and language communities, but the techniques do not cross borders. I will outline JSON, ProtoBuf, and GraphQL here so we can learn from them all.

MiloszKrajewski

open System.Diagnostics

let root = __SOURCE_DIRECTORY__
let debug = false

let exec directory executable arguments =
    let info = 
        ProcessStartInfo(
            executable, arguments,
            UseShellExecute = false, CreateNoWindow = not debug, WorkingDirectory = directory)

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

slang25

open Microsoft.AspNetCore.Hosting
open Microsoft.Extensions.Hosting
open Giraffe

let webApp = GET >=> route "/" >=> text "Hello world"

[<EntryPoint>]
let main args =
    Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(fun webBuilder ->

sogaiu

  ;; java <= 8
  (import 'java.lang.management.ManagementFactory)

  ;; <pid>@<pc-name>
  (let [[_ pid hostname]
        (re-find #"^(\d+)@(.*)"
          (.getName (ManagementFactory/getRuntimeMXBean)))]
    pid)

  ;; java >= 9