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Javascript swap array elements

... Even without utilizing ECMAScript 6 Destructuring Assignment, can actually achieve a simultaneous swap without polluting the current scope with a temporary variable: a = [b, b = a][0]; as pointed out by @Jan Although I still find myself utilizing the t...
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Difference between variable declaration syntaxes in Javascript (including global variables)?

...stant. Documents its unchanging nature for other programmers. Lets the JavaScript engine optimize on the basis that it won't change. #2 a = 0; This creates a property on the global object implicitly. As it's a normal property, you can delete it. I'd recommend not doing this, it can be unclear t...
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ASP.NET MVC Ajax Error handling

... filters.Add(new HandleExceptionAttribute()); } and then write this script on the layout or Master page: <script type="text/javascript"> $(document).ajaxError(function (e, jqxhr, settings, exception) { e.stopPropagation(); if (jqxhr !...
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jQuery loop over JSON result from AJAX Success?

... You can also use the getJSON function: $.getJSON('/your/script.php', function(data) { $.each(data, function(index) { alert(data[index].TEST1); alert(data[index].TEST2); }); }); This is really just a rewording of ifesdjeen's answer, but...
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Access event to call preventdefault from custom function originating from onclick attribute of tag

...ime() / 1000);" href="http://www.domain.com/docs/thingy.pdf"> If JavaScript is enabled, it opens the PDF with a cache busting query string, if not it just opens the PDF. share | improve this a...
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Ajax success event not working

...s well have a comment reminding that "the whole code shoud be wrapped in a script tag". The explanation is false: you do not have to wrap anything in anonymous functions, a named function will do, as long as you pass it instead of calling it. Furthermore it is misleading: OnSuccess gets called befor...
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Create a custom callback in JavaScript

... so it sees a specific value for this. You can easily do that with the JavaScript call function: function Thing(name) { this.name = name; } Thing.prototype.doSomething = function(callback) { // Call our callback, but using our own instance as the context callback.call(this); } function...
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How to set the prototype of a JavaScript object that has already been instantiated?

Suppose I have an object foo in my JavaScript code. foo is a complex object and it is generated somewhere else. How can I change the prototype of the foo object? ...
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Basic example of using .ajax() with JSONP?

... a different domain.) So - instead of using XMLHttpRequest we have to use script HTMLl tags, the ones you usually use to load JS files, in order for JS to get data from another domain. Sounds weird? Thing is - turns out script tags can be used in a fashion similar to XMLHttpRequest! Check this out...
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jQuery AJAX cross domain

...omain. Using PHP it's really simple, just add the following line into the script that you want to have access outside from your domain: header("Access-Control-Allow-Origin: *"); Don't forget to enable mod_headers module in httpd.conf. ...