moimikey

// ...
renderMenu() {
  const { children, ...rest } = this.props || {};

  // only store props that startWith `on` in case the parent component
  // wants to send event callbacks down, for subsequent use.
  const eventProps = Object.keys(rest)
    .filter(key => key.substr(0, 2) === 'on') // if startsWith 'on' (ie. onMouseOver)
    .reduce((obj, key) => Object.assign(obj, { [key]: rest[key] }), {});
  // ...

moimikey

const o = { a: true };
[...Array(9)].map(Function.prototype.valueOf, o);

moimikey

const assert = function (condition) {
  if (condition !== true && condition !== false) {
    throw new TypeError("Assertions should be only of booleans; you're writing your spec wrong.");
  }

  if (!condition) {
    throw new Error("Specification-level assertion failure");
  }
};
function whatIs(this$) {

moimikey

// O(1)
const todo = (state, action) => {
  const actions = {
    ADD_TODO: () => {
      return {
        id: action.id,
        text: action.text,
        completed: false
      }
    },

moimikey

lib	notes
babel-cli	basically what you need always
babel-register	this is only for dev or local use and not production or browser
babel-core	only necessary if using babel programatically
babel-polyfill	shims inconsistent browser functions like Array.from, etc.
babel-runtime	only helps at a code level by optimizing babel helpers into a single runtime

use presets

moimikey

<?php
function north_cast_api_data($content) {
  if (is_numeric($content)) $content = intval($content);
  else {
    $unserialized_content = @unserialize($content);
    // we got serialized content
    if ($unserialized_content !== false) {
      // make sure that integers are represented as such, instead of str
      foreach ($unserialized_content as $fn => &$c) {
        if (is_numeric($c)) $c = intval($c);

moimikey

// promises != callbacks
function doSomeAction() {
  // like $.ajax or $.getJSON from jQuery, fetch will similarly reach out to a remote/local
  // destination over HTTP, return a Promise object (the result of the `window.fetch`) that
  // we can listen to by simply chaining the `then` method, which is provided by the Promise
  // object that is returned by `window.fetch`.
  window.fetch(new Request('http://website.com/products.json')).then(function(response) {
    imFinished(response)
  })
}

moimikey

// callbacks != promises
function doSomeAction() {
  return true
}

function appleTree() {
  return doSomeAction()
}

appleTree()

moimikey

// require() some stuff from npm (like you were using browserify)
// and then hit Run Code to run it on the right
var locale2 = require('locale2');
document.write(locale2);

moimikey

/**
 * Michael Scott Hertzberg <[email protected]> (http://hertzber.gs)
 * 
 * recursively check for set localStorage value every 100ms.
 * this will also safely clear the timeout once found.
 * can be used callback style or directly.
 * functionally pure.
 */
function waitForLocalStorage(key, cb, timer) {
  if (!localStorage.getItem(key)) return (timer = setTimeout(waitForLocalStorage.bind(null, key, cb), 100))