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explicit casting from super class to subclass

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When should I use perror(“…”) and fprintf(stderr, “…”)?

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Why does an NSInteger variable have to be cast to long when used as a format argument?

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What is meant by “managed” vs “unmanaged” resources in .NET?

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Best way to create unique token in Rails?

...;) and they would instantly have all the tokens for every resource on your site. – Jon Lemmon Sep 27 '12 at 7:52 Needs...
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Difference between `set`, `setq`, and `setf` in Common Lisp?

...er hand, is subtle indeed -- it's like an "indirection". I suggest http://www.n-a-n-o.com/lisp/cmucl-tutorials/LISP-tutorial-16.html as a better way to get started understanding it than any answer here can give... in short, though, setf takes the first argument as a "reference", so that e.g. (aref ...
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Angularjs loading screen on ajax request

...e:true, template: '<div class="loading"><img src="http://www.nasa.gov/multimedia/videogallery/ajax-loader.gif" width="20" height="20" />LOADING...</div>', link: function (scope, element, attr) { scope.$watch('loading', function (val) { ...
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Visual Studio 2013 and BitBucket

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403 Forbidden vs 401 Unauthorized HTTP responses

...authenticate and try again.” To help you out, it will always include a WWW-Authenticate header that describes how to authenticate. This is a response generally returned by your web server, not your web application. It’s also something very temporary; the server is asking you to t...
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Turn off constraints temporarily (MS SQL)

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