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JavaScript: What are .extend and .prototype used for?

I am relatively new to JavaScript and keep seeing .extend and .prototype in third party libraries I am using. I thought it had to do with the Prototype javascript library, but I am beginning to think that is not the case. What are these used for? ...
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What is the best way to do a substring in a batch file?

...nced. You can now use the following optional syntax: %~I - expands %I removing any surrounding quotes (") %~fI - expands %I to a fully qualified path name %~dI - expands %I to a drive letter only %~pI - expands %I to a path only %~nI - expands %I to a file na...
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How to create ASP.NET Web API Url?

... ... } This UrlHelper doesn't exist neither in your views nor in the standard controllers. UPDATE: And in order to do routing outside of an ApiController you could do the following: public class HomeController : Controller { public ActionResult Index() { string url = Url.Rou...
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PHP shell_exec() vs exec()

I'm struggling to understand the difference between shell_exec() and exec() ... 4 Answers ...
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Understanding dispatch_async

...e background. For instance, if I am downloading a file from the internet and I want to update the user on the progress of the download, I will run the download in the priority default queue and update the UI in the main queue asynchronously. dispatch_async(dispatch_get_global_queue( DISPATCH_QUEU...
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How to use enum values in f:selectItem(s)

... more flexible considering what happens if the order of the enums changes, and if the list was large? And could I do this better? And is it possible to automatically "select" the item that the question have? ...
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PHP: Count a stdClass object

... the Countable interface). Try casting the object, like below, as an array and seeing if that helps. $total = count((array)$obj); Simply casting an object as an array won't always work but being a simple stdClass object it should get the job done here. ...
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How much size “Null” value takes in SQL Server

... However, a second bit, and a third bit, and all the way up to an eighth bit fit in the same byte. – Matti Virkkunen Sep 16 '10 at 22:29 ...
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Java Generics (Wildcards)

... In your first question, <? extends T> and <? super T> are examples of bounded wildcards. An unbounded wildcard looks like <?>, and basically means <? extends Object>. It loosely means the generic can be any type. A bounded wildcard (<? ext...
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Is it possible to include a file in your .gitconfig

...th = /path/to/file See here for a detailed description of the git change and its edge cases. By the way, a couple of subtleties worth pointing out: Environment-variable expansion, e.g. $HOME, is not supported. (Expansion of ~ appeared in Git 1.7.10.2.) If a relative path is specified, then it i...