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Elmロードマップ

(なんでロードマップが必要なのか書く)

Elm Guideをさらっと一周

Elm Guideをさらっと一周しましょう。

Elm Syntaxを読む

ababup1192

import {
  dateToFormattedString,
  dateToFormattedStringForInterviewTime,
  toUTC,
  utcToJstDateText,
  utcToJstTimeText,
} from './date';

describe('toUTC', () => {
  it('JSTのDateがUTCに変換される', () => {

ababup1192

module Main exposing (main)

import Browser
import Browser.Events exposing (onAnimationFrame)
import Html exposing (Html, button, div, p, text)
import Html.Events exposing (onClick)
import Task
import Time

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case class LastName private (value: String) extends AnyVal

object LastName {
  private[this] val maxLength = 32

  def apply(value: String): LastName = {
    val trimmed = value.trim
    require(!trimmed.isEmpty && trimmed.length <= maxLength)
    new LastName(trimmed)
  }

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> type Suit = Spade | Diamond | Club | Heart
> type Rank = Ace | Two | Three | Four | Five | Six | Seven | Eight | Nine | Ten | Jack | Queen | King
> suits = [ Spade, Diamond, Club, Heart ]
[Spade,Diamond,Club,Heart] : List Suit
> ranks = [ Ace, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Jack, Queen, King ]
[Ace,Two,Three,Four,Five,Six,Seven,Eight,Nine,Ten,Jack,Knight,Queen,King]
    : List Rank
> type Card = Card Suit Rank | Joker
> suits |> List.concatMap (\suit -> ranks |> List.map (Card suit) )

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module Main exposing (main)

import Browser
import Html exposing (Attribute, Html, button, div, input, label, p, text)
import Html.Attributes exposing (type_)
import Html.Events exposing (on, onClick, targetChecked)
import Json.Decode as JD


type alias Model =

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def insertionSort(list: List[Int]): List[Int] = {

  list match {
    case Nil     => Nil
    case List(x) => List(x)
    case x :: xs => {

      insert(x, insertionSort(xs))
    }
  }

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import scala.concurrent._
import scala.concurrent.duration.Duration
import ExecutionContext.Implicits.global

object Main extends App {

 def foo(x: Int): Future[Int] =
   Future {
     println(s"x: $x")
     Thread.sleep(300)

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type A = { v1: number, v2: number };

type X<K1 extends keyof any, K2 extends keyof any> = {
    [key in K1]: A | {
        [key in K2]: A
    }[]
} 

const f = <K1 extends keyof any, K2 extends keyof any>(
    obj: X<K1, K2>

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// カプセル化してるモジュール部分
type LengthError = (length: number) => string;
type ValidationWithError = {
  validations: ValidationErrors[],
  errorMessage: string | LengthError
}

const requiredF = (
  fieldText: string
): ValidationWithError => {