roine

From 0.19 Elm introduced 4 ways to boot an app:

1. sandbox (no outside interaction)
2. element (simple outside interaction - side effect, flags, subscriptions)
3. document (same as above but with title tag control)
4. application (whole SPA features)

Herteby

module ID exposing (ID(..), decodeFromString, decoder, encode, encodeAsString, fromInt, toInt, toString)

import Json.Decode as Decode exposing (Decoder)
import Json.Encode as Encode exposing (Value)


{-| This type ensures you get a type error if you for example accidentally pass a UserId in place of a CompanyId
-}
type ID phantom
    = ID Int

OliverJAsh

Option vs non-Option

	Option<T>	non-Option (T | undefined)
accessing property	userOption.map(user => user.age)	userNullish?.age
calling a method	userOption.map(user => user.fn())	userNullish?.fn()
providing fallback	ageOption.getOrElse(0)	ageNullish ?? 0
filter	ageOption.filter(checkIsOddNumber)	`ageNull