rauschma

const handler = {
  get(target, propKey, receiver) {
    if (/^_[0-9]+$/.test(propKey)) {
      const result = [];
      const first = Number(receiver);
      const last = Number(propKey.slice(1));
      for (let i=first; i<=last; i++) {
        result.push(i);
      }
      return result;

alexnoz

function linear (m) {
  return m
}

function power1In (m) {
  return -Math.cos(m * (Math.PI / 2)) + 1
}

function power1Out (m) {
  return Math.sin(m * (Math.PI / 2))

ebidel

<!-- 
Complete feature detection for ES modules. Covers:

1. Static import: import * from './foo.js';
2. Dynamic import(): import('./foo.js').then(module => {...});

Demo: http://jsbin.com/tilisaledu/1/edit?html,output

Thanks to @_gsathya, @kevincennis, @rauschma, @malyw for the help.
-->

bendc

const trackTime = timing => {
  const now = performance.now();
  if (!timing.startTime) timing.startTime = now;
  const elapsed = now - timing.startTime;
  const {duration} = timing;
  if (duration != null && duration <= elapsed) timing.startTime = null;
  return elapsed;
};

const delay = (callback, duration) => {

nblackburn

module.exports = (string) => {
    return string.replace(/([a-z0-9]|(?=[A-Z]))([A-Z])/g, '$1-$2').toLowerCase();
};

acdlite

// getComponent is a function that returns a promise for a component
// It will not be called until the first mount
function asyncComponent(getComponent) {
  return class AsyncComponent extends React.Component {
    static Component = null;
    state = { Component: AsyncComponent.Component };

    componentWillMount() {
      if (!this.state.Component) {
        getComponent().then(Component => {

jeffreymorganio

function randomDataSet(dataSetSize, minValue, maxValue) {
  return new Array(dataSetSize).fill(0).map(function(n) {
    return Math.random() * (maxValue - minValue) + minValue;
  });
}

evanwill

How to add more to Git Bash on Windows

Git for Windows comes bundled with the "Git Bash" terminal which is incredibly handy for unix-like commands on a windows machine. It is missing a few standard linux utilities, but it is easy to add ones that have a windows binary available.

The basic idea is that C:\Program Files\Git\mingw64\ is your / directory according to Git Bash (note: depending on how you installed it, the directory might be different. from the start menu, right click on the Git Bash icon and open file location. It might be something like C:\Users\name\AppData\Local\Programs\Git, the mingw64 in this directory is your root. Find it by using pwd -W). If you go to that directory, you will find the typical linux root folder structure (bin, etc, lib and so on).

If you are missing a utility, such as wget, track down a binary for windows and copy the files to the corresponding directories. Sometimes the windows binary have funny prefixes, so

soundyogi

void function() { "use strict"
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! WIP DO NOT USE WIP !!!!!!!!!!!!!!!!!!!!!

DO NOT USE THIS YET.
USE THE 2016 VERSION BELOW PLEASE.
                                                                         
                                                                         
WWWWWWWW                           WWWWWWWWIIIIIIIIIIPPPPPPPPPPPPPPPPP   
W::::::W                           W::::::WI::::::::IP::::::::::::::::P  
W::::::W                           W::::::WI::::::::IP::::::PPPPPP:::::P 

DmitrySoshnikov

@kangax's ES6 quiz, explained

@kangax created a new interesting quiz, this time devoted to ES6 (aka ES2015). I found this quiz very interesting and quite hard (made myself 3 mistakes on first pass).

Here we go with the explanations:

Question 1:

(function(x, f = () => x) {