'use strict';
  
  var value = require('./valid-value');
  
  module.exports = function (obj/*, …names*/) {
  	var length, current = 1;
  	value(obj);
  	length = arguments.length - 1;
  	if (!length) return obj;
  	while (current < length) {
  		obj = obj[arguments[current++]];
  		if (obj == null) return undefined;
  	}
  	return obj[arguments[current]];
  };