panuhorsmalahti

// JavaScript signed zero example.
// Note that +0 equals -0 in JavaScript.

var getPlusZero = () => +0;
var getNegativeZero = () => -0;
var isPlusZero = x => Math.atan2(0,  x) === 0;
var isNegativeZero = x => Math.atan2(0,  x) !== 0;

console.log(isPlusZero(getPlusZero()));
console.log(isPlusZero(getNegativeZero()));

panuhorsmalahti

Array.prototype.squeeze = function (n, fn) {
  const from = Object(this).slice();
  const to = [];

  while (n > 0 && from.length)
    to.push(fn.apply(undefined, from.splice(0, n)));

  return to;
}

panuhorsmalahti

var _ = require("lodash");
var performRoles = require("./performRoles.js");

performRoles({ foo: 1 });

panuhorsmalahti

const updated = (source, property, value) => {
  const out = {};
  Object.keys(source).forEach(key => {
    out[key] = source[key];
  });
  out[property] = value;
  return out;
};

const removed = (source, property) => {

panuhorsmalahti

const _ = new Proxy({}, { get: (target, prop) => it => it[prop] });

// Evaluates to [{ foo: true }]
[{ foo: true }, { foo: false }].filter(_.foo);

panuhorsmalahti

// Calls 'f' if the parameters are different from the last call.
// NOTE: Implement 'notEqual' yourself
const changed = f => {
  let lastParams = undefined, flag = false;
  return (...args) => {
    if (!flag || notEqual(lastParams, args)) {
      f(args);
      lastParams = args;
      flag = true
    }

panuhorsmalahti

function f(p) {
    console.log(Date.now());
    var x = [];
    while(x.length < 1000000) x.push(x.length);
    p = p || {};

    setTimeout(function() {
        f(p);
    }, 25);
};

panuhorsmalahti

function randomID() {
  return Math.random();
}

function serialize(obj, store) {
  const retVal = {};
  
  store = store || {
    root: retVal,
    objects: {},

panuhorsmalahti

// copied from https://gist.github.com/lauripiispanen/1fd1c3319084f9913f2d
// improved formatting
const constrain = ({
    pre = () => {},
    post = () => {}
}) => fn => (...args) => {
    const throwIf = x => y => {
        if (x(y)) {
            throw x(y);
        } else {

panuhorsmalahti

<link rel="import" href="../polymer/polymer.html">

<dom-module id="hello-world">
    <template>
        <h1>Hello</h1>
    </template>
</dom-module>

<script type="module">
import { assign } from "./lib/lodash/lodash.js";