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@property retain, assign, copy, nonatomic in Objective-C

As someone that's new to Objective-C can someone give me an overview of the retain, assign, copy and any others I'm missing, that follow the @property directive? What are they doing and why would I want to use one over another? ...
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ASP.NET 4.5 has not been registered on the Web server

...ent machine, and in order to use SQL Express instance instead of the localDB installed by default. I unchecked "Use IIS Express" in my MVC 4 project properties page (Web tab), then I got the following error: ...
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Generating an Excel file in ASP.NET [closed]

I am about to add a section to an ASP.NET app (VB.NET codebehind) that will allow a user to get data returned to them as an Excel file, which I will generate based on database data. While there are several ways of doing this, each has its own drawbacks. How would you return the data? I'm lookin...
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Turning multi-line string into single comma-separated

Let's say I have the following string: 17 Answers 17 ...
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Git reset --hard and push to remote repository

I had a repository that had some bad commits on it (D, E and F for this example). 5 Answers ...
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Can gcc output C code after preprocessing?

I'm using an open source library which seems to have lots of preprocessing directives to support many languages other than C. So that I can study what the library is doing I'd like to see the C code that I'm compiling after preprocessing, more like what I'd write. ...
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Formatting Decimal places in R

... Background: Some answers suggested on this page (e.g., signif, options(digits=...)) do not guarantee that a certain number of decimals are displayed for an arbitrary number. I presume this is a design feature in R whereby good s...
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How do I generate a stream from a string?

... public static Stream GenerateStreamFromString(string s) { var stream = new MemoryStream(); var writer = new StreamWriter(stream); writer.Write(s); writer.Flush(); stream.Position = 0; return stream; } ...
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REST APIs: custom HTTP headers vs URL parameters

... The URL indicates the resource itself. A "client" is a resource that can be acted upon, so should be part of the base url: /orders/view/client/23. Parameters are just that, to parameterize access to the resource. This especially comes into play with posts and searches: /orders/find?q=blahblah&...
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How to remove text from a string?

I've got a data-123 string. 11 Answers 11 ...