We Keep Coding

Need Functions That Wait Until Cache Can Be Verified

I'm aware that the immediate response is going to be to use promises for the following problem. However, I've looked at every example I can and nothing seems to be readable to me. Most is done through HTML examples, which I don't understand. Similar posts here have a plethora of arguments on which syntax is appropriate which furthers the confusion. So, please show me how I might use a promise to do the following or if another solution is better.
I'd like for a function to check if the cache is available, and if not, it will reinitialize the cache:
function valData(){
if (arrOfNames || arrOfRanges == null){
initializeGame();
Logger.log('Game Initialized')
}
else {
Logger.log('Data Available')
}
};
I'm aware this is likely sloppy, but stay with me
This function works as intended, as does the following:
function reqVal(valname,x){
if (x == 0){
var nameArr = convToString(arrOfNames);
var valIndex = nameArr.indexOf("" + valname)
return arrOfRanges[valIndex];
}
else {
var nameArr = convToString(arrOfNames);
var valIndex = nameArr.indexOf("" + valname)
return valIndex;
}
};
Again, very very sloppy but Ill clean things up once I can make them function
Both of these scripts work fine on their own and return what I need. But if I have a third script:
function test(){
valData();
var valNum = reqVal('curHP', 0);
var valIndex = reqVal('curHP',1)
var newNum = valNum - 5;
Logger.log(valNum)
Logger.log(newNum)
Logger.log(valIndex)
};
The reqVal() function fails due to the asynchronous nature of GAS and the Cache having expired, but the valData() function succeeds and produces the needed array. So, I know I need to add a promise in valData() that the reqVal() function can read from but have no idea how to format that as examples I've seen have been very unclear.

Twitch TV JSON API Issue

So,I am trying to use the twitch API:
https://codepen.io/sterg/pen/yJmzrN
If you check my codepen page you'll see that each time I refresh the page the status order changes and I can't figure out why is this happening.
Here is my javascript:
$(document).ready(function(){
var ur="";
var tw=["freecodecamp","nightblue3","imaqtpie","bunnyfufuu","mushisgosu","tsm_dyrus","esl_sc2"];
var j=0;
for(var i=0;i<tw.length;i++){
ur="https://api.twitch.tv/kraken/streams/"+tw[i];
$.getJSON(ur,function(json) {
$(".tst").append(JSON.stringify(json));
$(".name").append("<li> "+tw[j]+"<p>"+""+"</p></li>");
if(json.stream==null){
$(".stat").append("<li>"+"Offline"+"</li>");
}
else{
$(".stat").append("<li>"+json.stream.game+"</li>");
}
j++;
})
}
});

$.getJSON() works asynchronously. The JSON won't be returned until the results come back. The API can return in different orders than the requests were made, so you have to handle this.
One way to do this is use the promise API, along with $.when() to bundle up all requests as one big promise, which will succeed or fail as one whole block. This also ensures that the response data is returned to your code in the expected order.
Try this:
var channelIds = ['freecodecamp', 'nightblue3', 'imaqtpie', 'bunnyfufuu', 'mushisgosu', 'tsm_dyrus', 'esl_sc2'];
$(function () {
$.when.apply(
$,
$.map(channelIds, function (channelId) {
return $.getJSON(
'https://api.twitch.tv/kraken/streams/' + encodeURIComponent(channelId)
).then(function (res) {
return {
channelId: channelId,
stream: res.stream
}
});
})
).then(function () {
console.log(arguments);
var $playersBody = $('table.players tbody');
$.each(arguments, function (index, data) {
$playersBody.append(
$('<tr>').append([
$('<td>'),
$('<td>').append(
$('<a>')
.text(data.channelId)
.attr('href', 'https://www.twitch.tv/' + encodeURIComponent(data.channelId))
),
$('<td>').text(data.stream ? data.stream.game : 'Offline')
])
)
})
})
});
https://codepen.io/anon/pen/KrOxwo
Here, I'm using $.when.apply() to use $.when with an array, rather than list of parameters. Next, I'm using $.map() to convert the array of channel IDs into an array of promises for each ID. After that, I have a simple helper function with handles the normal response (res), pulls out the relevant stream data, while attaching the channelId for use later on. (Without this, we would have to go back to the original array to get the ID. You can do this, but in my opinion, that isn't the best practice. I'd much prefer to keep the data with the response so that later refactoring is less likely to break something. This is a matter of preference.)
Next, I have a .then() handler which takes all of the data and loops through them. This data is returned as arguments to the function, so I simply use $.each() to iterate over each argument rather than having to name them out.
I made some changes in how I'm handling the HTML as well. You'll note that I'm using $.text() and $.attr() to set the dynamic values. This ensures that your HTML is valid (as you're not really using HTML for the dynamic bit at all). Otherwise, someone might have the username of <script src="somethingEvil.js"></script> and it'd run on your page. This avoids that problem entirely.

It looks like you're appending the "Display Name" in the same order every time you refresh, by using the j counter variable.
However, you're appending the "Status" as each request returns. Since these HTTP requests are asynchronous, the order in which they are appended to the document will vary each time you reload the page.
If you want the statuses to remain in the same order (matching the order of the Display Names), you'll need to store the response data from each API call as they return, and order it yourself before appending it to the body.

At first, I changed the last else condition (the one that prints out the streamed game) as $(".stat").append("<li>"+jtw[j]+": "+json.stream.game+"</li>"); - it was identical in meaning to what you tried to achieve, yet produced the same error.
There's a discrepancy in the list you've created and the data you receive. They are not directly associated.
It is a preferred way to use $(".stat").append("<li>"+json.stream._links.self+": "+json.stream.game+"</li>");, you may even get the name of the user with regex or substr in the worst case.
As long as you don't run separate loops for uploading the columns "DisplayName" and "Status", you might even be able to separate them, in case you do not desire to write them into the same line, as my example does.
Whatever way you're choosing, in the end, the problem is that the "Status" column's order of uploading is not identical to the one you're doing in "Status Name".

This code will not preserve the order, but will preserve which array entry is being processed
$(document).ready(function() {
var ur = "";
var tw = ["freecodecamp", "nightblue3", "imaqtpie", "bunnyfufuu", "mushisgosu", "tsm_dyrus", "esl_sc2"];
for (var i = 0; i < tw.length; i++) {
ur = "https://api.twitch.tv/kraken/streams/" + tw[i];
(function(j) {
$.getJSON(ur, function(json) {
$(".tst").append(JSON.stringify(json));
$(".name").append("<li> " + tw[j] + "<p>" + "" + "</p></li>");
if (json.stream == null) {
$(".stat").append("<li>" + "Offline" + "</li>");
} else {
$(".stat").append("<li>" + json.stream.game + "</li>");
}
})
}(i));
}
});
This code will preserve the order fully - the layout needs tweaking though
$(document).ready(function() {
var ur = "";
var tw = ["freecodecamp", "nightblue3", "imaqtpie", "bunnyfufuu", "mushisgosu", "tsm_dyrus", "esl_sc2"];
for (var i = 0; i < tw.length; i++) {
ur = "https://api.twitch.tv/kraken/streams/" + tw[i];
(function(j) {
var name = $(".name").append("<li> " + tw[j] + "<p>" + "" + "</p></li>");
var stat = $(".stat").append("<li></li>")[0].lastElementChild;
console.log(stat);
$.getJSON(ur, function(json) {
$(".tst").append(JSON.stringify(json));
if (json.stream == null) {
$(stat).text("Offline");
} else {
$(stat).text(json.stream.game);
}
}).then(function(e) {
console.log(e);
}, function(e) {
console.error(e);
});
}(i));
}
});

Speeding up Ajax success DOM manipulation

I am using an AJAX call on my page which return table rows and on success adds them to a table in the page. Below is the code currently used:
function GetDPRecords(Perso) {
//alert(Perso);
$Records = $('#DPRecords');
//alert($PersoFileName.val()+" | "+$ProcFromDate.val()+" | "+$ProcToDate.val());
$.ajax({
type: "GET",
url: "SelectDPRecords.jsp",
data: $('form#Search_Form').serialize() + "&Personalized=" + Perso,
beforeSend: function () {
$Records.find("tr:gt(0)").remove();
$("<tr><td colspan='4'><h3 style='margin: 4px 10px'> Loading... </h3></td></tr>").hide().appendTo($Records).show(400);
},
success: function (data) {
$Records.find("tr:gt(0)").remove();
$(data).hide().appendTo($Records).show(400);
}
});
}
The issue is that I at times expect a large number of rows to be returned (1,000-5,000). I did a test run with 4,000 rows data returned and it caused the browser to be unresponsive for about 20 seconds.
Any way to optimize the code and reduce the loading time?

One possible solution is to use a paging system: instead of returning 1,000-5,000 rows, you break the results into pages of, say, 50 results each, and only return one page at a time. You would then give the user buttons to load other pages at the top/bottom of the table.
For an example of what I am talking about, see http://luis-almeida.github.io/jPages/defaults.html. It uses pictures instead of rows, but it is the same basic concept.

Just to add #aj_r's suggestion If you do not want to hit the server again to retrieve the data for next range then you can store the result to a javascript variable (JSON Object Array) and then use that locally with pagination.

I've been facing the same problem recently using huge datagrids in jqGrid and I've been able to find a tricky solution which turned out to be working very well.
Thing is you cannot render all this data at once - this is just too much, especially considering how slow DOM manipulations are. So you need some sort of queue. You can split this data into chunks and render them sequentiali using setTimeout() or setInterval() but those doesn't have well reputation in terms of performance as well.
I ended up using reuestAnimationFrame and splitting my huge data into pieces and rendering them whenever an animation frame was available. So you need to start with polyfill to make sure what you are going to do will actually work, I'm using a great one by Paul irish:
Heres an awsome jsFiddle: http://jsfiddle.net/cjw5eota/1/
And here's the JS:
var dataRows = 5000; // enter ammount of returned rows
var chunkSize = 200; // define single chunk size, optimize for best performance bu trying different values, if your DOM manipulation is heavy use less, if its lightweight you can use more, use 1 to see in slowmo how it works
// We are simulating big returned object here
var data = {}
for (var i = 0; i < dataRows; i++) {
data[i] = {
'id': i,
'name': 'I am data for row ' + i
};
}
// shim layer with setTimeout fallback
window.requestAnimFrame = (function () {
return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function (callback) {
window.setTimeout(callback, 1000 / 60);
};
})();
function renderRecords(data) {
var dataLength = Object.keys(data).length;
var i = 0;
function renderInQueue() {
console.time('Rendering in queue');
for (t = 0; t < chunkSize; t++) {
if (i < dataLength) {
var row = '<tr><td>' + data[i].id +
'</td><td>' + data[i].name + '</td></tr>'
$('table').append(row);
}
i++;
}
if (i < dataLength) {
requestAnimationFrame(renderInQueue);
} else {
console.log('Done rendering');
console.timeEnd('Rendering in queue');
}
}
renderInQueue();
}
// run the script of rendering
renderRecords(data);
I have included a simple performance benchmark for you to see in console how much an entire rendering process takes. Play with chunkSize to see how it changes and try to find a value that will best suit your needs, that is give you decent rendering time without putting heavy load on the browser.
The more you try to render at once the fastest the rendering will be, but more resources will be required to handle each iteration of rendering.

Run function after another function completes JavaScript and JQuery

I need a little help. I'm trying to run my second function "likeLinks();" but only after my first function "getLikeURLs();" is finished. This is because my 2nd function relies on the links Array to execute. It seems like they are trying to run at the same time.
Any help would be appreciated.
var links = [];
var url = '/' + window.location.pathname.split('/')[1] + '/' + window.location.pathname.split('/')[2] + '/'
getLikeURLs();
likeLinks();
function getLikeURLs() {
for (i = 1; i < parseInt(document.getElementsByClassName('PageNav')[0].getAttribute('data-last')) + 2; i++) {
var link = $.get(url + 'page-' + i, function(data) {
//gets the like links from current page
$(data).find('a[class="LikeLink item control like"]').each(function() {
links.push($(this).attr('href')); // Puts the links in the Array
});
});
}
}
function likeLinks() {
for (t = 0; t <= links.length; t++) {
var token = document.getElementsByName('_xfToken')[0].getAttribute('value')
$.post(links[t], {
_xfToken: token,
_xfNoRedirect: 1,
_xfResponseType: 'json'
}, function(data) {});
}
}

The link variables are actually jQuery deferred objects - store them in an array and then you can use $.when() to create a mew deferred object that only resolves when all of the previous $.get() operations have completed:
function getLikeURLs(url) { // NB: parameter, not global
var defs = [], links = []; // NB: links no longer global
for (...) {
var link = $.get(...);
defs.push(link);
}
// wait for previous `$.get` to finish, and when they have create a new
// deferred object that will return the entire array of links
return $.when.apply($, defs).then(function() { return links; });
}
Then, to start the chain of functions:
getLikeURLs(url).then(likeLinks);
Note that likeLinks will now be passed the array of links instead of accessing it from the global state. That function should also be rewritten to allow you to wait for its $.post calls to complete, too:
function likeLinks(links) {
// loop invariant - take it outside the loop
var token = document.getElementsByName('_xfToken')[0].getAttribute('value');
// create array of deferreds, one for each link
var defs = links.map(function(link) {
return $.post(link, {
_xfToken: token,
_xfNoRedirect: 1,
_xfResponseType: 'json'
});
});
// and another for when they're all done
return $.when.apply($, defs);
}
p.s. don't put that (relatively) expensive parseInt(document.getAttribute(...)) expression within the for statement - it'll cause it to be evaluated every iteration. Calculate it once outside the loop and store it in a variable. There's a few other places where you're repeating calls unnecessarily, e.g. window.location.pathname.split()

EDIT: My answer discusses the issue but see Alnitak answer for a much better solution.
The get in getLikeURLs and the put in likeLinks are both asynchronous. The calls to both of these function return immediately. When data is returned from the called server at some indeterminate time later, the callback functions are then called. The puts could return before the gets which would be a problem in your case. Also note that JavaScript is NOT multi-threaded so the two methods, getLikeURLs and likeLinks will never run at the same time. The callback functions, on the other hand, might be called at anytime later with no guarantee as to the call back order. For example, the 3rd get/put might return before the 1st get/put in your loops.
You could use $.ajax to specify that the gets and puts are synchronous but this is ill advised because the browser will hang if ANY get/put doesn't return in a reasonable amount of time (e.g. server is offline). Plus you don't have the "multi-tasking" benefit of sending out a lot of requests and having the various servers working at the same time. They would do so serially.
The trick is to simply call likeLinks form the callback function in getLikeURL. Your case is a little tricky because of the for loop but this should work:
var links = [];
var url = '/' + window.location.pathname.split('/')[1] + '/' + window.location.pathname.split('/')[2] + '/'
getLikeURLs();
//likeLinks(); // Don't call yet. Wait for gets to all return.
function getLikeURLs() {
var returnCount = 0; // Initialize a callback counter.
var count = parseInt(document.getElementsByClassName('PageNav')[0].getAttribute('data-last')) + 1;
for (i = 0; i < count; i++) {
var link = $.get(url + 'page-' + (i + 1), function(data) {
//gets the like links from current page
$(data).find('a[class="LikeLink item control like"]').each(function() {
links.push($(this).attr('href')); // Puts the links in the Array
});
// If all gets have returned, call likeLinks.
returnCount++;
if (returnCount === count) {
likeLinks();
}
});
}
}
function likeLinks() {
for (t = 0; t <= links.length; t++) {
var token = document.getElementsByName('_xfToken')[0].getAttribute('value')
$.post(links[t], {
_xfToken: token,
_xfNoRedirect: 1,
_xfResponseType: 'json'
}, function(data) {});
}
}

Javascript, execute scripts code in order inserted into dom tree

NOT A DUPLICATE AS I HAVE YET TO FOUND A SATISFYING ANSWER ON OTHER THREADS:
Load and execute javascript code SYNCHRONOUSLY
Loading HTML and Script order execution
Load and execute javascript code SYNCHRONOUSLY
Looking for native Javascript answers, no jQuery, no requireJS, and so forth please :)
SUMMARY OF THE ENTIRE QUESTION:
I want to asynchronously load scripts but have ordered execution
I am trying to enforce that the code in the inserted script elements execute exactly in the same order as they were added to the dom tree.
That is, if I insert two script tags, first and second, any code in first must fire before the second, no matter who finishes loading first.
I have tried with the async attribute and defer attribute when inserting into the head but doesn't seem to obey.
I have tried with element.setAttribute("defer", "") and element.setAttribute("async", false) and other combinations.
The issue I am experiencing currently has to do when including an external script, but that is also the only test I have performed where there is latency.
The second script, which is a local one is always fired before the first one, even though it is inserted afterwards in the dom tree ( head ).
A) Note that I am still trying to insert both script elements into the DOM. Ofcourse the above could be achieved by inserting first, let it finish and insert the second one, but I was hoping there would be another way because this might be slow.
My understanding is that RequireJS seems to be doing just this, so it should be possible. However, requireJS might be pulling it off by doing it as described in A).
Code if you would like to try directly in firebug, just copy and paste:
function loadScript(path, callback, errorCallback, options) {
var element = document.createElement('script');
element.setAttribute("type", 'text/javascript');
element.setAttribute("src", path);
return loadElement(element, callback, errorCallback, options);
}
function loadElement(element, callback, errorCallback, options) {
element.setAttribute("defer", "");
// element.setAttribute("async", "false");
element.loaded = false;
if (element.readyState){ // IE
element.onreadystatechange = function(){
if (element.readyState == "loaded" || element.readyState == "complete"){
element.onreadystatechange = null;
loadElementOnLoad(element, callback);
}
};
} else { // Others
element.onload = function() {
loadElementOnLoad(element, callback);
};
}
element.onerror = function() {
errorCallback && errorCallback(element);
};
(document.head || document.getElementsByTagName('head')[0] || document.body).appendChild(element);
return element;
}
function loadElementOnLoad(element, callback) {
if (element.loaded != true) {
element.loaded = true;
if ( callback ) callback(element);
}
}
loadScript("http://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js",function() {
alert(1);
})
loadScript("http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js",function() {
alert(2);
})
If you try the above code in like firebug, most often it will fire 2, and then 1. I want to ensure 1 and then 2 but include both in the head.

if I insert two script tags, first and second, any code in first must fire before the second, no matter who finishes loading first. I have tried with the async attribute and defer attribute
No, async and defer won't help you here. Whenever you dynamically insert script elements into the DOM, they are loaded and executed asynchronically. You can't do anything against that.
My understanding is that RequireJS seems to be doing just this
No. Even with RequireJS the scripts are executed asynchronous and not in order. Only the module initialiser functions in those scripts are just define()d, not executed. Requirejs then does look when their dependencies are met and executes them later when the other modules are loaded.
Of course you can reinvent the wheel, but you will have to go with a requirejs-like structure.

Ok, I think I have now came up with a solution.
The trick is that we keep track of each script to be loaded and their order as we insert them into the dom tree. Each of their callback is then registered accordingly to their element.
Then we keep track of when all has finished loading and when they all have, we go through the stack and fire their callbacks.
var stack = [];
stack.loaded = 0;
function loadScriptNew(path, callback) {
var o = { callback: callback };
stack.push(o);
loadScript(path, function() {
o.callbackArgs = arguments;
stack.loaded++;
executeWhenReady();
});
}
function executeWhenReady() {
if ( stack.length == stack.loaded ) {
while(stack.length) {
var o = stack.pop();
o.callback.apply(undefined, o.callbackArgs);
}
stack.loaded = 0;
}
}
// The above is what has been added to the code in the question.
function loadScript(path, callback) {
var element = document.createElement('script');
element.setAttribute("type", 'text/javascript');
element.setAttribute("src", path);
return loadElement(element, callback);
}
function loadElement(element, callback) {
element.setAttribute("defer", "");
// element.setAttribute("async", "false");
element.loaded = false;
if (element.readyState){ // IE
element.onreadystatechange = function(){
if (element.readyState == "loaded" || element.readyState == "complete"){
element.onreadystatechange = null;
loadElementOnLoad(element, callback);
}
};
} else { // Others
element.onload = function() {
loadElementOnLoad(element, callback);
};
}
(document.head || document.getElementsByTagName('head')[0] || document.body).appendChild(element);
return element;
}
function loadElementOnLoad(element, callback) {
if (element.loaded != true) {
element.loaded = true;
if ( callback ) callback(element);
}
}
loadScriptNew("http://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.js",function() {
alert(1);
});
loadScriptNew("http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js",function() {
alert(2);
});
Ok, some of you might argue that there is missing info in the question, which I will give you and here we are actually just solving the callback. You are right. The code in the script is still executed in the wrong order, but the callback is now.
But for me this is good enough, as I intend to wrap all code that is loaded in a method call, alá AMD, such as a require or define call and will put on stack there, and then fire them in the callback instead.
I am still hoping out for Asad and his iframe solution, which I believe might provide the best answer to this question. For me though, this solution will solve my problems :)

I am posting here just like a draft
This do not work because cross-domain police
Here the idea is to obtain all scripts first and when they are in memory, execute them in order.
function loadScript(order, path) {
var xhr = new XMLHttpRequest();
xhr.open("GET",path,true);
xhr.send();
xhr.onreadystatechange = function(){
if(xhr.readyState == 4){
if(xhr.status >= 200 && xhr.status < 300 || xhr == 304){
loadedScripts[order] = xhr.responseText;
}
else {
//deal with error
loadedScripts[order] = 'alert("this is a failure to load script '+order+'");';
// or loadedScripts[order] = ''; // this smoothly fails
}
alert(order+' - '+xhr.status+' > '+xhr.responseText); // this is to show the completion order. Careful, FF stacks aletrs so you see in reverse.
// am I the last one ???
executeAllScripts();
}
};
}
function executeAllScripts(){
if(loadedScripts.length!=scriptsToLoad.length) return;
for(var a=0; a<loadedScripts.length; a++) eval(loadedScripts[a]);
scriptsToLoad = [];
}
var loadedScripts = [];
var scriptsToLoad = [
"http://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js",
"http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js",
"http://nowhere.existing.real_script.com.ar/return404.js"
];
// load all even in reverse order ... or randomly
for(var a=0; a<scriptsToLoad.length; a++) loadScript(a, scriptsToLoad[a]);

After a while of fiddling around with it, here is what I came up with. Requests for the scripts are sent off immediately, but they are executed only in a specified order.
The algorithm:
The algorithm is to maintain a tree (I didn't have time to implement this: right now it is just the degenerate case of a list) of scripts that need to be executed. Requests for all of these are dispatched nearly simultaneously. Every time a script is loaded, two things happen: 1) the script is added to a flat list of loaded scripts, and 2) going down from the root node, as many scripts in each branch that are loaded but have not been executed are executed.
The cool thing about this is that not all scripts need to be loaded in order for execution to begin.
The implementation:
For demonstration purposes, I am iterating backward over the scriptsToExecute array, so that the request for CFInstall is sent off before the request for angularJS. This does not necessarily mean CFInstall will load before angularJS, but there is a better chance of it happening. Regardless of this, angularJS will always be evaluated before CFInstall.
Note that I've used jQuery to make my life easier as far as creating the iframe element and assigning the load handler is concerned, but you can write this without jQuery:
// The array of scripts to load and execute
var scriptsToExecute = [
"http://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js?t=" + Date.now(),
"http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js?t=" + Date.now()
];
// Loaded scripts are stored here
var loadedScripts = {};
// For demonstration purposes, the requests are sent in reverse order.
// They will still be executed in the order specified in the array.
(function start() {
for (var i = scriptsToExecute.length - 1; i >= 0; i--) {
(function () {
var addr = scriptsToExecute[i];
requestData(addr, function () {
console.log("loaded " + addr);
});
})();
}
})();
// This function executes as many scripts as it currently can, by
// inserting script tags with the corresponding src attribute. The
// scripts aren't reloaded, since they are in the cache. You could
// alternatively eval `script.code`
function executeScript(script) {
loadedScripts[script.URL] = script.code
while (loadedScripts.hasOwnProperty(scriptsToExecute[0])) {
var scriptToRun = scriptsToExecute.shift()
var element = document.createElement('script');
element.setAttribute("type", 'text/javascript');
element.setAttribute("src", scriptToRun);
$('head').append(element);
console.log("executed " + scriptToRun);
}
}
// This function fires off a request for a script
function requestData(path, loadCallback) {
var iframe = $("<iframe/>").load(function () {
loadCallback();
executeScript({
URL: $(this).attr("src"),
code: $(this).html()
});
}).attr({"src" : path, "display" : "none"}).appendTo($('body'));
}
You can see a demo here. Observe the console.

cant you nest the loading using ur callbacks?
ie:
loadScript("http://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js",function() {
alert(1);
loadScript("http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.3/CFInstall.min.js",function() {
alert(2);
})
})