robinpokorny

const words = ["hello", " ", "world"];

for (let i = 0; i <= words.length; i++) {
  const word = words[i];
  if (word.length <= 0) continue;
  words[i] = uppercaseFirstLetter(word.trim());
}

const titlecasedWords = words
  .filter(isNotEmpty)

robinpokorny

function fire() {
    local BRANCH=emergency-`date +%s`-`git config user.email`
    git checkout -b $BRANCH
    git add -A
    git commit -m 'EMERGENCY!'
    git push -f origin $BRANCH
}
# Inspired by https://www.reddit.com/r/ProgrammerHumor/comments/3nc531/in_case_of_fire/cvn1k27/

robinpokorny

const length = 4

const duplicate = (n) => 2 * n

class Foo {…}

export default (n) => duplicate(n) + length

robinpokorny

/*
 * Include after hyperapp.js and before your app
 * Use this version provided by rawgit.com:
 * https://cdn.rawgit.com/robinpokorny/c1f049f815ec274fdedbb454c56d74ee/raw/hyperapp-logger.js
 */

const mapValue = (object, iteratee) => {
  // https://github.com/lodash/lodash/blob/master/mapValue.js
  object = Object(object);
  const result = {};

robinpokorny

// A: Simple multiplication
function doubleA(n) {
  return n * 2
}

// B: With a variable
var two = 2
function doubleB(n) {
  return n * two
}

robinpokorny

const sleep = (dur) => (data) =>
  new Promise((res) =>
    setTimeout(() => res(data), dur)
  )

const yay = () => Promise.resolve('sleepy')
  .then(sleep(1000))
  .then((status) => console.log(`I am so ${status}!`))

yay()

robinpokorny

const iconList = [
  { name: 'star',  code: 7807, size: 20 /* ... */ },
  { name: 'heart', code: 7897, size: 10 /* ... */ },
  { name: 'arrow', code: 7822, size: 25 /* ... */ },
  { name: 'home',  code: 7901, size: 20 /* ... */ }
]

const entries = iconList.map(({ name, ...rest }) => [ name, rest ])

const icons = new Map(entries)

robinpokorny

See also 📰 Dead simple tweetable JavaScript PubSub pattern module using Set (ES2015) which this package uses.

Browser compatibility

Chrome*	Edge	FF	IE	Opera	Safari	iOS
38	12	13	-*	25	7.1	8

Notes:

robinpokorny

export default (tasks, {
  args = [],
  initial,
  isEmpty = (x) => !x
} = {}) =>
  tasks.reduce(
    (prev, next) => prev.then((value) =>
      isEmpty(value) ? next(...args) : value
    ),
    Promise.resolve(initial)

robinpokorny

const firstResult = (services) => { /* … */ }

firstResult([
  () => Promise.resolve([]),
  () => Promise.resolve(['Berlin']),
  () => console.error('Do not call me!')
])
  .then((result) =>
    console.assert(result[0] === 'Berlin', 'Test1 failed!')
  )