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Spinlock versus Semaphore
...ur thread is scheduled again, but if this is no problem (usually it isn't) then it can be a very efficient, CPU-conservative approach.
3. How they behave in presence of congestion
It is a common misconception that spinlocks or lock-free algorithms are "generally faster", or that they are only usefu...
Paging UICollectionView by cells, not screen
... the collection view scrolls the whole page, which is 2 cells at once, and then it stops.
22 Answers
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FileSystemWatcher vs polling to watch for file changes
...get the file names safely cached away (in our case, into a database table) then process them.
For file locking issues I spawn a process which waits around for the file to be unlocked waiting one second, then two, then four, et cetera. We never poll. This has been in production without error for ab...
'UserControl' constructor with parameters in C#
... that your UserControl must enforce, encapsulate them in another class and then assign an instance of that class to your control via a property. This will give a bit better separation of concern as well.
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Easy way of running the same junit test over and over?
...f that will break in the future.
If you are implementing your own runner, then you could have the runner run the test 10 times. If you are using a third party runner, then with 4.7, you can use the new @Rule annotation and implement the MethodRule interface so that it takes the statement and execut...
Xcode duplicate/delete line
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To delete a line: Ctrl-A to go to the beginning of the line, then Ctrl-K to delete it, and another time Ctrl-K to remove the empty line. (I do not use Xcode very often, but I'm used to that in Emacs and other text inputs with Emacs-like bindings, and it seems to work in Xcode too.)
A...
Why does Double.NaN==Double.NaN return false?
...le.NaN);
Or, equals:
If this and argument both represent Double.NaN, then
the equals method returns true, even though
Double.NaN==Double.NaN has the value false.
Double.NaN.equals(Double.NaN);
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Connecting to TCP Socket from browser using javascript
...Permission.requestPermission({remoteAddress:"127.0.0.1", remotePort:6789}).then(
() => {
// Permission was granted
// Create a new TCP client socket and connect to remote host
var mySocket = new TCPSocket("127.0.0.1", 6789);
// Send data to server
mySocket.writeable.write("...
What key shortcuts are to comment and uncomment code?
... it is View -> Toolbars -> XML Editor if you are on an XML file, and then View -> Toolbars -> Text Editor if you are on a text file. If you set one, it seems to remember it for both (so you should only have to set one).
– user1477388
Aug 4 '14 at 2...
Animate a custom Dialog
...n settings are set to "No Animations" (Settings → Display → Animation) then the dialogs won't be animated no matter what you do!
The following is a stripped down version of my styles.xml. Hopefully it is self-explanatory. This should be located in res/values.
<?xml version="1.0" encoding="u...