define(['../internal/isLength', '../lang/isNative', '../lang/isObject', '../internal/shimKeys'], function(isLength, isNative, isObject, shimKeys) {

/* Native method references for those with the same name as other `lodash` methods. */

var nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys;

/**

* Creates an array of the own enumerable property names of `object`.

*

* **Note:** Non-object values are coerced to objects. See the

* [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.keys)

* for more details.

*

* @static

* @memberOf _

* @category Object

* @param {Object} object The object to inspect.

* @returns {Array} Returns the array of property names.

* @example

*

* function Foo() {

* this.a = 1;

* this.b = 2;

* }

*

* Foo.prototype.c = 3;

*

* _.keys(new Foo);

* // => ['a', 'b'] (iteration order is not guaranteed)

*

* _.keys('hi');

* // => ['0', '1']

*/

var keys = !nativeKeys ? shimKeys : function(object) {

if (object) {

var Ctor = object.constructor,

length = object.length;

}

if ((typeof Ctor == 'function' && Ctor.prototype === object) ||

(typeof object != 'function' && (length && isLength(length)))) {

return shimKeys(object);

}

return isObject(object) ? nativeKeys(object) : [];

};

return keys;

});