Editing for vs forEach

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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)

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)

var i,
    value,
    length,
    values = [],
    sum = 0,
    context = values;

for (i = 0; i < 10000; i++) {
    values[i] = Math.random();
}

function add(val) {
    sum += val;
}
function addEach(k, val) {
    sum += val;
}

var toString = Object.prototype.toString;

function isArray(obj) {
	return toString.call(obj) === '[object Array]';
}

function isObject(obj) {
	return toString.call(obj) === '[object Object]';
}

function isString(obj) {
	return toString.call(obj) === '[object String]';
}

function each(obj, iterator) {
	var key, length;
	if (!obj) {
		return;
	}
	length = obj.length;

if (isArray(obj) || isString(obj)) {
		for(key = 0; key < length; key += 1) {
			iterator(obj[key], key, obj);
		}
		return obj;
	}

if (isObject(obj)) {
		for(key in obj) {
			if (obj.hasOwnProperty(key)) {
				iterator(obj[key], key, obj);
			}
		}
		return obj;
	}

return obj;
};

Title

Async (check if this is an asynchronous test)

Code

each2(values, add);