var DESCRIPTORS = require('../internals/descriptors');
var definePropertyModule = require('../internals/object-define-property');
var anObject = require('../internals/an-object');
var objectKeys = require('../internals/object-keys');

// `Object.defineProperties` method
// https://tc39.github.io/ecma262/#sec-object.defineproperties
module.exports = DESCRIPTORS ? Object.defineProperties : function defineProperties(O, Properties) {
  anObject(O);
  var keys = objectKeys(Properties);
  var length = keys.length;
  var index = 0;
  var key;
  while (length > index) definePropertyModule.f(O, key = keys[index++], Properties[key]);
  return O;
};