处理来自ajax请求的返回但在回调函数之外的数据

/*
   Get the source of the data.
*/

if (if_the_source_is_an_url) {

  $.getJSON(url_here, function(returnedData){ theData = returnedData; });

}

/*
   Here we have the default processing of theData.
*/

$.getJSON(url_here,
function(returnedData){ theData =
returnedData; break;});

if (url) $.getJSON(url_here,
function(returnedData){
customFunction(returnedData); });
else customFunction(defaultData);