如何在jQuery Ajax调用后更新全局变量（关联数组）？

Question

如何在jQuery Ajax调用后更新全局变量（关联数组）？

var languageCode = {};
$.ajax({
  url: 'languages/en.xml',
  success: function(xml) {
    $(xml).find('string').each(function() {
      languageCode[$(this).attr('name')] = $(this).text();
      console.log(languageCode.IDSA_HI_THERE);  // This works
    });
    console.log(languageCode);
  }
});
console.log(languageCode.IDSA_HI_THERE); // This doesn't work because this gets called before the ajax request. How to make this work?