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How do I detect when someone shakes an iPhone?

I want to react when somebody shakes the iPhone. I don't particularly care how they shake it, just that it was waved vigorously about for a split second. Does anyone know how to detect this? ...
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Checking for NULL pointer in C/C++ [closed]

... One important thing to note: until recently, I was in favor of writing "if (ptr)" instead of "if (ptr != NULL)" or "if (ptr != nullptr)" as it is more concise so it makes the code more readable. But I just found out that comp...
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Why use multiple columns as primary keys (composite primary key)

... Your understanding is correct. You would do this in many cases. One example is in a relationship like OrderHeader and OrderDetail. The PK in OrderHeader might be OrderNumber. The PK in OrderDetail might be OrderNumber AND LineNumber. If it was either of those two, it would not be unique...
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What are the rules about using an underscore in a C++ identifier?

... The C++ standard doesn't "import" the C one, does it? They import certain headers, but not the language as a whole, or naming rules, as far as I know. But yeah, the _t one surprised me as well. But since it's C, it can only apply to the global ns. Should be safe to...
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How to choose between Hudson and Jenkins? [closed]

...ly, what is the direction each branch is taking and what are key points so one could make a choice between which to go with? ...
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How to parse a query string into a NameValueCollection in .NET

...hy to install 100 M of additional libraries on client computer to just use one simple method? However, it looks like Microsoft doesn't have any better idea. The only way is to implement own method or use open source implementation. – Vitalii Jun 1 '12 at 12:05 ...
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Post parameter is always null

... I'm having some real odd issue when calling POST on my WebAPI. I've even gone back to the basic version generated on new project. So: ...
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Where is git.exe located?

... why was this so difficult – Jonesopolis Aug 26 '14 at 16:19 18 Its locate...
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How do you prevent IDisposable from spreading to all your classes?

...ace creates and starts Tyer thread which waits patiently at waitHandle.WaitOne() The Shoelace would call waitHandle.Set() when it wanted the thread to start tying. – GrahamS Mar 19 '09 at 14:11 ...
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Extract a regular expression match

... One way would be this: test <- regexpr("[0-9]+","aaa12456xxx") Now, notice regexpr gives you the starting and ending indices of the string: > test [1] 4 attr(,"match.length") [1] 5 So you can use that info wi...