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var slice = Array.prototype.slice,
    arrayLike = {0: 'a', 1: 'b', 2: 'c', 3: 'd', length:4},
    a = slice.call(arrayLike), // undefined
    b = slice.call(arrayLike, undefined); // the array as expected
 
print(a); // undefined
print(b); // "a,b,c,d"

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// BESEN strange behavior on named accessor property
// Tested on r77

var obj = Object.defineProperty({}, 'foo', { set: undefined }),
    desc = Object.getOwnPropertyDescriptor(obj, 'foo');

// Definning a setter just to make the property a named accessor property.
// (`undefined` is a valid value for the [[Set]] and [[Get]] property attributes)

// the getter is correctly `undefined`, the FromPropertyDescriptor

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function parseDate(str, format) {
  format = format || 'yyyy-mm-dd'; // default format
  // build a regular expression to match the format
  var i = 0, fmt = {}, 
      re = new RegExp('^'+format.replace(/(yyyy|dd|mm)/g, function (match) {
        fmt[match] = ++i; // store format position
        return '(\\d{'+match.length+'})'; // make a capturing group
      })+'$'), parts = str.match(re); // match the date parts

  if (!parts) return null; // input didn't match the format pattern

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(function () {
  var frameworks = {
    'MooTools Core': 'MooTools.version',
    'MooTools More': 'MooTools.More.version',
    'Base2': 'base2.version',
    'Dojo': 'dojo.version',
    'Ext JS': 'Ext.version',
    'jQuery': 'jQuery.fn.jquery',
    'jQuery UI': 'jQuery.ui.version',
    'MochKit': 'MochiKit.MochiKit.VERSION',

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function getStyle(el, styleProp) {
  var value, defaultView = el.ownerDocument.defaultView;
  // W3C standard way:
  if (defaultView && defaultView.getComputedStyle) {
    // sanitize property name to css notation (hypen separated words eg. font-Size)
    styleProp = styleProp.replace(/([A-Z])/g, "-$1").toLowerCase();
    return defaultView.getComputedStyle(el, null).getPropertyValue(styleProp);
  } else if (el.currentStyle) { // IE
    // sanitize property name to camelCase
    styleProp = styleProp.replace(/\-(\w)/g, function(str, letter) {