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Objective-C declared @property attributes (nonatomic, copy, strong, weak)

... nonatomic mean that it should not be accessed concurrently by multiple threads. The default is atomic which makes it thread safe. – wcochran Apr 16 '15 at 14:02 ...
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jQuery duplicate DIV into another DIV

...The .clone() method performs a deep copy of the set of matched elements, meaning that it copies the matched elements as well as all of their descendant elements and text nodes. When used in conjunction with one of the insertion methods, .clone() is a convenient way to duplicate elements on a...
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What happens to global and static variables in a shared library when it is dynamically linked?

... static variables are dynamically linked to an application. By modules, I mean each project in a solution (I work a lot with visual studio!). These modules are either built into *.lib or *.dll or the *.exe itself. ...
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Why is it important to override GetHashCode when Equals method is overridden?

...ect {1,0,0} has a different hash to {0,1,0} and {0,0,1} (if you see what I mean), – Marc Gravell♦ Jan 16 '09 at 13:45 13 ...
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How do I avoid capturing self in blocks when implementing an API?

...mple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "correct" or recommended way to implement this type of scenario. ...
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How to restart Activity in Android

... I think you got that wrong. A downvote means wrong/bad answer, and upvote means an answer is great. How great an answer is compared to others is indicated by the number of upvotes. I can see that you're trying to promote your answer, but you're misusing the system...
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“is” operator behaves unexpectedly with integers

...pected result It is not an expected result. Why is it expected? It only means that the integers valued at 256 referenced by both a and b are the same instance of integer. Integers are immutable in Python, thus they cannot change. This should have no impact on any code. It should not be expected. ...
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How to create a readonly textbox in ASP.NET MVC3 Razor

... What do you mean by "this solution disables filed against editing," (it seems incomprehensible)? Please respond by editing your answer, not here in comments (as appropriate). – Peter Mortensen Sep 1...
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How do cache lines work?

...he L3 or L2 cache but not for the RAM where it is more like 90ns. What you mean is the burst time - the time to access the next quad-word in burst mode (which is actually the correct answer) – Martin Kersten Aug 30 '16 at 9:40 ...
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Error: Can't set headers after they are sent to the client

...y res.end(data). The error "Error: Can't set headers after they are sent." means that you're already in the Body or Finished state, but some function tried to set a header or statusCode. When you see this error, try to look for anything that tries to send a header after some of the body has already ...