SO - 24931115

JavaScript

var arr = ["file1", "file2", "file3"];

var d = $.Deferred().resolve();
while (arr.length > 0) {
   d = d.then(uploadFile(arr.shift()));
}

function uploadFile(file){
    var d = $.Deferred();    
    setTimeout(function(){ console.log("Uploading file:"+file); d.resolve(""); },1000);
    return d.promise();
}