manakuro

const handleUpdate = async (user, onUpdated) => {
  try {
    await updateUser(user)
    await updateProfile(user.profile)
    await onUpdated(user) // email or notify something
  } catch (e) {
    // handling error
  }
}

manakuro

const tmp = new Set();
const filtered = lists.filter(a => !tmp.has(a.code) && tmp.add(a.code))

manakuro

const filtered = uniqueByCode(lists)

manakuro

const person = { score: 25 };

let newScore = person.score
newScore = newScore + newScore
newScore += 7
newScore = Math.max(0, Math.min(100, newScore));
console.log(newScore) // 57

manakuro

let newScore = person.score
newScore = double(newScore)
newScore = add(newScore, 7)
newScore = boundScore(0, 100, newScore)

console.log(newScore) // 57

manakuro

const person = { score: 25 };

const newScore = person.score
  |> double
  |> add(7, ?)
  |> boundScore(0, 100, ?);

newScore //=> 57

manakuro

const generateQuery = (params) => {
  const query = {}

  try {
    if (params.email) {
      const isValid = isValidEmail(params.email)
      if (isValid) {
        query.email = params.email
      }
    }

manakuro

const email = (query, params) => {
  if (!params.email) return query

  const isValid = isValidEmail(params.email)
  if (!isValid) throw new Error('Invalid email')

  return { ...query, ...{ email: params.email } }
}

const maxAge = (query, params) => {

manakuro

const generateQuery = (params, callbacks) => {
  let query = {}

  try {
    callbacks.forEach(c => {
      query = c(query, params)
    })
  } catch(err) {
    // error handing
  }

manakuro

const fetch = async () => {
  return await axios.get('/users')
}
const users = await fetch()
...