ryuheechul

/* this works */
"1=2=3"
  |> Js.String.split("=")
  |. Js.log;

/* this works, too */
"1=2=3"
  -> Js.log;

/* but this doesn't */

ryuheechul

Claim: Difficulty with interop with JS when accepting nested object param from JS to Reason

Reasonml Ver: 3.3.2

• No problem with taking parameters from JS and matching to any type contains optional with one depth

• But it seems to lose values wrapped by option if you have more depth like below

ryuheechul

from typing import List
from random import randint

from .core.cards import Card
from .player import Me, Other


def bet(
    me: Me,
    bet_players: List[Other],

ryuheechul

use https://scastie.scala-lang.org to test code

ryuheechul

I wanted to make an npm module via ReasonML

• a function need to accept objects
• but couldn't find a way to convert an JS Object to a Reason Record (holds optional value)

// I wanted to have an npm module function like below
reasonFnExposedToJs({key1: 'blah', key2: undefined})

// and works fine with Reason side but generated argsFromJs looks like below

ryuheechul

const ttl = (strings, ...variables) => [strings, ...variables]
// or const ttl = (...args) => [...args]

// we are using www.styled-components.com as an example

const Adder = ({className, x, y}) => {
  return (
    <span className={className}> {x+y} </span>
  )
}

ryuheechul

function printTo100(n) {
  for (i in [...Array(100).keys()]){
    console.log(`${n}-${i}`)
  }
  return Promise.resolve()
}

Promise.all(
  printTo100('a'),
  printTo100('b'),

ryuheechul

# find a process using port 3000 via https://unix.stackexchange.com/a/106562
sudo lsof -n -i :3000 | grep LISTEN

# export env vars from a file via https://github.com/sunghyunzz
export $(cat .env | xargs)

# check the reachability of the website every 1 seconds
while true; do curl -I https://example.com/; sleep 1; done

# pipe stdout as one arg to another command

ryuheechul

const { hss, scene, storage, market } = require('hire-scene-stealer')

hss
  .scene(scene
    .url('https://google.com')
    .selector('img#hplogo')
    .domIndex(0) // you can skip if it's 0
    .viewport(900, 700)
  )
  .storage(storage

ryuheechul

port module Echo exposing (..)

import Platform exposing (program, Program)
import Json.Decode
-- importing Json.Decode is necessary for now because of https://github.com/elm-lang/elm-make/issues/127

---- MODEL ----

type alias Model =
    { crap : String }