Editing Cloning an Object

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Test case details

Title *

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Preparation code

Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries)

var object_create = Object.create;
  if (typeof object_create !== 'function') {
    object_create = function(o) {
      function F() {}
      F.prototype = o;
      return new F();
    };
  }

function deepCopy(src) {
    if (src === null || typeof(src) !== 'object') {
      return src;
    }

//Honor native/custom clone methods
    if (typeof src.clone === 'function') {
      return src.clone(true);
    }

//Special cases:
    //Date
    if (src instanceof Date) {
      return new Date(src.getTime());
    }
    //RegExp
    if (src instanceof RegExp) {
      return new RegExp(src);
    }
    //DOM Elements
    if (src.nodeType && typeof src.cloneNode === 'function') {
      return src.cloneNode(deep);
    }

var proto = (Object.getPrototypeOf ? Object.getPrototypeOf(src) : src.__proto__);
    if (!proto) {
      proto = src.constructor.prototype;
    }
    var ret = object_create(proto);

for (var key in src) {
      ret[key] = deepCopy(src[key]);
    }
    return ret;
  }
</script>

Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script>

Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ)

Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ)

Code snippets to compare

Test 1

Title

Async (check if this is an asynchronous test)

Code

var newObject = jQuery.extend(true, {}, oldObject);

Test 2

Title

Async (check if this is an asynchronous test)

Code

var newObject = JSON.parse(JSON.stringify(oldObject));

Test 3

Title

Async (check if this is an asynchronous test)

Code

var newObject = clone(oldObject);
function clone(old) {
	var obj = {};
	for (var i in old) {
	  if (old.hasOwnProperty(i)) {
	    obj[i] = old[i];
	  }
	}
	return obj;
}