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POVariable overwritten when using asynchronous AJAX (using jQuery) request to load data
 

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  1. POVariable overwritten when using asynchronous AJAX (using jQuery) request to load data
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    <p>I have the following code that loads information about a users payments a month in advance of when it's needed. The function works when I wait for each month to load however it fails when multiple ajax requests are being run. Basically duplicate data gets added to my monthData array which implies that loadedPaymentMonth is being overwritten each function call. I'd like to load the data asynchronously so any thoughts?</p> <p>This doesn't work:</p> <pre><code>var monthData=[]; function loadMonth(monthToLoad,curMonth){ $("#paymentContent").find(".loader").remove(); var monthToGet; switch(monthToLoad){ case "Next": monthToGet=monthData.length-curMonth+1; break; case "Prev": monthToGet=-curMonth-1; break; case "This": monthToGet=currentMonthPointer-curMonth; break; } var loadedPaymentMonth=new PaymentMonth(); if(monthToGet&lt;0){ currentMonthPointer+=1; monthData.unshift(loadedPaymentMonth); } else{ monthData.push(loadedPaymentMonth); } $.getJSON(host+"GetDataForMonth.aspx?StartMonth="+monthToGet,function(data){ loadedPaymentMonth.setMonthData(data.monthData,data.month,data.year); if($("#paymentsContent").find(".loader").remove().length&gt;0){ loadedPaymentMonth.createPaymentRowsForMonth(); } }).error(function(){ $("#paymentsContent").find(".loader").remove(); }); } </code></pre> <p>This does:</p> <pre><code>function loadMonth(monthToLoad,curMonth){ $("#paymentContent").find(".loader").remove(); var monthToGet; switch(monthToLoad){ case "Next": monthToGet=monthData.length-curMonth+1; break; case "Prev": monthToGet=-curMonth-1; break; case "This": monthToGet=currentMonthPointer-curMonth; break; } var loadedPaymentMonth=new PaymentMonth(); if(monthToGet&lt;0){ currentMonthPointer+=1; monthData.unshift(loadedPaymentMonth); } else{ monthData.push(loadedPaymentMonth); } $.ajax({ url:host+"GetDataForMonth.aspx?StartMonth="+monthToGet, async:false, dataType:"json", success:function(data){ loadedPaymentMonth.setMonthData(data.monthData,data.month,data.year); if($("#paymentsContent").find(".loader").remove().length&gt;0){ loadedPaymentMonth.createPaymentRowsForMonth(); } } }).error(function(){ $("#paymentsContent").find(".loader").remove(); }); } </code></pre>
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    1. USWilliam Neely
    1. USWilliam Neely
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    1. COvar loadedPaymentMonth=new PaymentMonth(); creates a new PaymentMonth object and inserts it into an array. Each function call should create a new paymentmonth object. So while the variable name might be the same, the reference should be specific to the function context it was created in.
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      1. POVariable overwritten when using asynchronous AJAX (using jQuery) request to load data
      1. USWilliam Neely
 

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