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Detect backspace in empty UITextField
... may work on iPhone > 3.1.3, but it's hacky and may break on future versions, etc. I think I found a cleaner, more stable solution for how to detect a delete keyboard key press on the iPhone/iOS.
– ma11hew28
Jul 9 '11 at 22:24
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force client disconnect from server with socket.io and nodejs
Is there any way to disconnect a client with SocketIO, and literally close the connection? So if someone is connected to my server, and I want to close the connection between them and my server, how would I go about doing that?
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Matplotlib: “Unknown projection '3d'” error
...'s answer (not enough reputation for a comment) there is a good example of mixing 2d and 3d plots in the documentation at http://matplotlib.org/examples/mplot3d/mixed_subplots_demo.html which shows projection='3d' working in combination with the Axes3D import.
from mpl_toolkits.mplot3d import Axes3...
Detect permission of camera in iOS
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Check the AVAuthorizationStatus and handle the cases properly.
NSString *mediaType = AVMediaTypeVideo;
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
if(authStatus == AVAuthorizationStatusAuthorize...
Creating a ZIP Archive in Memory Using System.IO.Compression
...hStodola ZipArchive add checksum at the end of archive to determine corruption or changing (security reasons ) . So until closing archive or disposing it , checksum does not included in stream . I hope explain it clear !
– Amir
May 14 '16 at 10:01
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'Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of
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If you get an icon error when submitting an application from Xcode9, or if you cannot see app icon on your simulator as well as a device, just update your cocoapods to the latest version in your project. That issue is a bug in Xcode9 with cocoapods.
There's a new guideline ...
iPhone UITextField - Change placeholder text color
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Since the introduction of attributed strings in UIViews in iOS 6, it's possible to assign a color to the placeholder text like this:
if ([textField respondsToSelector:@selector(setAttributedPlaceholder:)]) {
UIColor *color = [UIColor blackCo...
Getting the location from an IP address [duplicate]
I want to retrieve information like the city, state, and country of a visitor from their IP address, so that I can customize my web page according to their location. Is there a good and reliable way to do this in PHP? I am using JavaScript for client-side scripting, PHP for server-side scripting, an...
UITextfield leftView/rightView padding on iOS7
The leftView and rightView views of an UITextField on iOS7 are really close to the textfield border.
27 Answers
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Difference between “managed” and “unmanaged”
...ual Basic or C#, in Visual Studio all unmanaged code is written in C/C++.
Mixing the two
Since Visual C++ can be compiled to either managed or unmanaged code it is possible to mix the two in the same application. This blurs the line between the two and complicates the definition, but it's worth me...