用Javascript檢查2個互斥條件的最佳方法是什麼？

Question

您好我有下面的代碼，用於檢查Rails的模型狀態

var intervalCall = setInterval(function(){ 
    $.post("getstatus", {id:id}); 
    var finished = "<%= @sentence.finished%>"; 
    //THIS IS CONDITION ONE, IT IS LIKELY TO HAPPEN LATER AND I WANT TO STOP THE SETINTERVAL 
    if ("<%= @sentence.result %>"){ 
     clearInterval(intervalCall); 
     state_2(); 
    } 
    //THIS IS CONDITION TWO, IT IS LIKELY TO HAPPEN EARLIER AND I WANT 
    // TO KEEP THE SETINTERVAL RUNNING AFTER IT"S MET 
    else if (String(finished)== "true"){ 
     state_1(); 
    } 
},3000); 


intervalCall; 

什麼是組織這種流動的最佳方式？

在此先感謝！

Answer 1

// setInterval/ setTimeout return the timer id 
var intervalCall; 
function updateStatus(){ 
    // post need a callback to process the data response by server 
    $.post("getstatus", {id:id}, function (data) { 
     data = $.parseJSON (data) // asume you use jQuery and the data is a json string 
     if (data.result){ 
      state_2(); // if you want the result as a arg, do state_2(data.result) 
      return; 
     } else { 
      // no need to use finished flag, when there is a response and no result, call again 
      // anything when no success resulte you want to do could write here 

      state_1(); 
      intervalCall = setTimeout (updateStatus, 3000); 
     } 
    }); 
},3000); 
intervalCall = setTimeout (updateStatus, 3000); 

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