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Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
...e is first set. In these cases, it
is useful to remove the need to check and unwrap the optional’s value
every time it is accessed, because it can be safely assumed to have a
value all of the time.
These kinds of optionals are defined as implicitly unwrapped
optionals. You write an im...
Android 4.1: How to check notifications are disabled for the application?
Android 4.1 offers the user a check box to disable notifications for a specific application.
6 Answers
...
How do I serialize an object and save it to a file in Android?
Say I have some simple class and once it's instantiated as an object I want to be able to serialize its contents to a file, and retrieve it by loading that file at some later time... I'm not sure where to start here, what do I need to do to serialize this object to a file?
...
How do I detect when someone shakes an iPhone?
...btype == UIEventSubtypeMotionShake )
{
// Put in code here to handle shake
}
if ( [super respondsToSelector:@selector(motionEnded:withEvent:)] )
[super motionEnded:motion withEvent:event];
}
- (BOOL)canBecomeFirstResponder
{ return YES; }
@end
You can easily transfor...
git-svn: how do I create a new svn branch via git?
...ing it, I it might help adding examples of the specific git svn branch command and relate it to a typical workflow.
Like kch answered, use git svn branch. Here is a full example, (note the -n for dry-run to test):
git svn branch -n -m "Branch for authentication bug" auth_bug
If this goes well, ...
How do I show a console output/window in a forms application?
...
I tested on Windows 8 and Windows 10: - AttachConsole works from a cmd box - AllocConsole works from Visual Studio. When alloc is needed, AttachConsole returns false. You should also call FreeConsole() before terminating the application in console...
IIS7 Cache-Control
...;
That will inform the client to cache content for 7 days in that folder and all subfolders.
You can also do this by editing the IIS7 metabase via appcmd.exe, like so:
\Windows\system32\inetsrv\appcmd.exe
set config "Default Web Site/folder"
-section:system.webServer/staticContent
-cl...
How can I pad a String in Java?
...
Apache StringUtils has several methods: leftPad, rightPad, center and repeat.
But please note that — as others have mentioned and demonstrated in this answer — String.format() and the Formatter classes in the JDK are better options. Use them over the commons code.
...
Virtualbox “port forward” from Guest to Host [closed]
...
Network communication Host -> Guest
Connect to the Guest and find out the ip address:
ifconfig
example of result (ip address is 10.0.2.15):
eth0 Link encap:Ethernet HWaddr 08:00:27:AE:36:99
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
Go to Vbox inst...
How to give border to any element using css without adding border-width to the whole width of elemen
...
outline:1px solid white;
This won't add the extra width and height.
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