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What is the difference between visibility:hidden and display:none?

...h you can still interact with it through the dom). There will be no space allocated for it between the other tags. visibility:hidden means that unlike display:none, the tag is not visible, but space is allocated for it on the page. The tag is rendered, it just isn't seen on the page. For exampl...
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What is a pre-revprop-change hook in SVN, and how do I create it?

... sure that the new svn:log message is not empty. set bIsEmpty=true for /f "tokens=*" %%g in ('find /V ""') do ( set bIsEmpty=false ) if "%bIsEmpty%" == "true" goto ERROR_EMPTY goto :eof :ERROR_EMPTY echo Empty svn:log messages are not allowed. >&2 goto ERROR_EXIT :ERROR_PROPNAME echo Only ...
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Programmatically set the initial view controller using Storyboards

...ngWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds]; UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; UIViewController *viewController = // determine the initial view controlle...
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How to convert a std::string to const char* or char*?

...t chance that your string implementation will need to do some extra memory allocation and/or data copying in order to prepare the NUL terminated buffer As a further hint, if a function's parameters require the (const) char* but don't insist on getting x.size(), the function probably needs an ASCII...
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When to use -retainCount?

...meaningless. If you're trying to track down why an object isn't getting deallocated, use the Leaks tool in Instruments. If you're trying to track down why an object was deallocated too soon, use the Zombies tool in Instruments. But don't use -retainCount. It's a truly worthless method. edit Pl...
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POST JSON to API using Rails and HTTParty

...ave an api and instructions as follows. You need to authenticate and get a token and then submit the ticket with the token. From squishlist. ...
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Decimal separator comma (',') with numberDecimal inputType in EditText

...har[] getAcceptedChars() { return mAccepted; } /** * Allocates a DigitsKeyListener that accepts the digits 0 through 9. */ public MyDigitsKeyListener() { this(false, false); } /** * Allocates a DigitsKeyListener that accepts the digits 0 through 9...
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Proper way to exit iPhone application?

... it to exit due to certain user actions. After cleaning up memory the app allocated, what's the appropriate method to call to terminate the application? ...
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Reason to Pass a Pointer by Reference in C++?

...reference. For instance, if you have a class holding data in a dynamically allocated array, but you want to provide (nonconstant) access to this data to the client. At the same time, you do not want the client to be able to manipulate the memory through the pointer. – user23218...
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How to “return an object” in C++?

...hat, you'd probably want to do the out parameter. It avoids dynamic memory allocation, which is safer and generally faster. It does require you have some way to construct the object prior to calling the function, which doesn't always make sense for all objects. If you want to use dynamic allocation...