paulirish

/* bling.js */
window.$ = document.querySelector.bind(document);
window.$$ = document.querySelectorAll.bind(document);
Node.prototype.on = window.on = function(name, fn) { this.addEventListener(name, fn); };
NodeList.prototype.__proto__ = Array.prototype;
NodeList.prototype.on = function(name, fn) { this.forEach((elem) => elem.on(name, fn)); };

eerohele

/**
* Swap the elements in an array at indexes x and y.
*
* @param (a) The array.
* @param (x) The index of the first element to swap.
* @param (y) The index of the second element to swap.
* @return {Array} The input array with the elements swapped.
*/
var swapArrayElements = function (a, x, y) {
  if (a.length === 1) return a;