使用AJAX请求进行异步阵列更新

我一直在试图找出如何使用AJAX请求更新全局变量。我陷入困境，需要帮助

var markerArray = [];

function JSONload(position){ //Loads JSON and markers
console.log("data getting jsoned");
$.getJSON('json/***.json', function(result){ //gets the json and parses it into results
    $.each(result, function(index, value){ //for each result, give the index and the value    
    reps.push({value: value, index: index}); //push the value at to the array. ex. Ian Calderon 
    }); 


   try{ 
    for (var i=0; i<reps.length; i++){
       if(reps[i].value.lat !== 'undefined' && reps[i].value.position === position){           
         var marker = (createMarker(reps[i].value.lat, reps[i].value.long, reps[i].index)); //only try to create the marker if there is the values
         updateArray(markerArray, marker);

            }}}
   catch(e){
   }
    });

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但坦率地说，我不知道如何继续

我认为功能范围让你感到困惑

试试这个：

 var that = this; 
 console.log("data getting jsoned");

  updateArray(that.markerArray, marker);

该变量应该可以访问函数中的全局变量

 var that = this; 
 console.log("data getting jsoned");

  updateArray(that.markerArray, marker);