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What are deferred objects?

...As of jQuery 1.5, the Deferred object provides a way to register multiple callbacks into self-managed callback queues, invoke callback queues as appropriate, and relay the success or failure state of any synchronous or asynchronous function. Deferred Methods: deferred.done() Add handlers to be cal...
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Nginx no-www to www and www to no-www

...n.php last; # etc etc... } } Note: I have not originally included https:// in my solution since we use loadbalancers and our https:// server is a high-traffic SSL payment server: we do not mix https:// and http://. To check the nginx version, use nginx -v. Strip www from ...
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A semantics for Bash scripts?

...patchwork together little scripts that appear to work. However, I don't really know what's going on, and I was hoping for a more formal introduction to Bash as a programming language. For example: What is the evaluation order? what are the scoping rules? What is the typing discipline, e.g. is ever...
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Loading cross-domain endpoint with AJAX

... API URL. (Supports https: see github repository) If you want to automatically enable cross-domain requests when needed, use the following snippet: $.ajaxPrefilter( function (options) { if (options.crossDomain && jQuery.support.cors) { var http = (window.location.protocol === 'http:'...
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addEventListener vs onclick

...se); Using this approach (DOM Level 2 events), you can attach a theoretically unlimited number of events to any single element. The only practical limitation is client-side memory and other performance concerns, which are different for each browser. The examples above represent using an anonymous...
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Using custom fonts using CSS?

... Generically, you can use a custom font using @font-face in your CSS. Here's a very basic example: @font-face { font-family: 'YourFontName'; /*a name to be used later*/ src: url('http://domain.com/fonts/font.ttf'); /*URL to ...
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How do I break out of a loop in Scala?

...nt) { sum += i; if (sum < max) addTo(i+1,max) } addTo(0,1000) (1c) Fall back to using a while loop var sum = 0 var i = 0 while (i <= 1000 && sum <= 1000) { sum += 1; i += 1 } (2) Throw an exception. object AllDone extends Exception { } var sum = 0 try { for (i <- 0 to 1...
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How much is the overhead of smart pointers compared to normal pointers in C++?

..._ptr always has memory overhead for reference counter, though it is very small. std::unique_ptr has time overhead only during constructor (if it has to copy the provided deleter and/or null-initialize the pointer) and during destructor (to destroy the owned object). std::shared_ptr has time overhe...
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Converting JavaScript object with numeric keys into array

... It's actually very straight forward with jQuery's $.map var arr = $.map(obj, function(el) { return el }); FIDDLE and almost as easy without jQuery as well, converting the keys to an array and then mapping back the values with Arra...
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Real-world examples of recursion [closed]

...l, and fixes itself quickly( Type A) , Except for one in 5 people ( We'll call these type B ) who become permanently infected with it and shows no symptoms and merely acts a spreader. This creates quite annoying waves of havoc when ever type B infects a multitude of type A. Your task is to track ...