define(function () {
var _hasDontEnumBug,
_dontEnums;
function checkDontEnum(){
_dontEnums = [
'toString',
'toLocaleString',
'valueOf',
'hasOwnProperty',
'isPrototypeOf',
'propertyIsEnumerable',
'constructor'
];
_hasDontEnumBug = true;
for (var key in {'toString': null}) {
_hasDontEnumBug = false;
}
}
/**
* Similar to Array/forEach but works over object properties and fixes Don't
* Enum bug on IE.
* based on: http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-implementation
*/
function forIn(obj, fn, thisObj){
var key, i = 0;
// no need to check if argument is a real object that way we can use
// it for arrays, functions, date, etc.
//post-pone check till needed
if (_hasDontEnumBug == null) checkDontEnum();
for (key in obj) {
if (exec(fn, obj, key, thisObj) === false) {
break;
}
}
Iif (_hasDontEnumBug) {
while (key = _dontEnums[i++]) {
// since we aren't using hasOwn check we need to make sure the
// property was overwritten
if (obj[key] !== Object.prototype[key]) {
if (exec(fn, obj, key, thisObj) === false) {
break;
}
}
}
}
}
function exec(fn, obj, key, thisObj){
return fn.call(thisObj, obj[key], key, obj);
}
return forIn;
});
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