var isObject = require('./isObject'),

isPrototype = require('./_isPrototype'),
nativeKeysIn = require('./_nativeKeysIn');

/** Used for built-in method references. */ var objectProto = Object.prototype;

/** Used to check objects for own properties. */ var hasOwnProperty = objectProto.hasOwnProperty;

/**

* The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/

function baseKeysIn(object) {

if (!isObject(object)) {
  return nativeKeysIn(object);
}
var isProto = isPrototype(object),
    result = [];

for (var key in object) {
  if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
    result.push(key);
  }
}
return result;

}

module.exports = baseKeysIn;