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java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
...tshell WeakReference prevents you from leaking the activity... you need to call mActivity.get() to actually get the instance, and it will be null if the activity was destroyed. To update it, you will need to write mActivity = new WeakReference<FragmentActivity>(this); - a good place is in onCr...
Is it possible to use “/” in a filename?
...ou can't, unless your filesystem has a bug. Here's why:
There is a system call for renaming your file defined in fs/namei.c called renameat:
SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
int, newdfd, const char __user *, newname)
When the system call gets i...
When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
...between types (such as int to float, or pointer to void*), and it can also call explicit conversion functions (or implicit ones). In many cases, explicitly stating static_cast isn't necessary, but it's important to note that the T(something) syntax is equivalent to (T)something and should be avoided...
How can I mask a UIImageView?
...d with two parameters: image and maskImage, these you have to set when you call the method. An example call could look like this, assuming the method is in the same class and the pictures are in your bundle:
Note - amazingly the images do not even have to be the same size.
...
UIImage *image = [UI...
Setting multiple attributes for an element at once with JavaScript
... {
for(var key in attrs) {
el.setAttribute(key, attrs[key]);
}
}
Call it like this:
setAttributes(elem, {"src": "http://example.com/something.jpeg", "height": "100%", ...});
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impr...
What is the maximum depth of the java call stack?
How deep do I need to go into the call stack before I get a StackOverflowError? Is the answer platform dependent?
4 Answers...
How to use transactions with dapper.net?
...licitly roll back on error or does System.Transactions handle that automatically?
– Norbert Norbertson
Oct 3 '17 at 12:30
6
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How do you print out a stack trace to the console/log in Cocoa?
I'd like to log the call trace during certain points, like failed assertions, or uncaught exceptions.
6 Answers
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How efficient can Meteor be while sharing a huge collection among many clients?
... using this.userId. The publish
function sends data into the merge box by calling this.added, this.changed and
this.removed. See the
full publish documentation for
more details.
Most publish functions don't have to muck around with the low-level
added, changed and removed API, though. If a publi...
C# constructor execution order
...Constructor chaining works out which base class constructor is going to be called
The base class is initialized (recurse all of this :)
The constructor bodies in the chain in this class are executed (note that there can be more than one if they're chained with Foo() : this(...) etc
Note that in Ja...