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Locking pattern for proper use of .NET MemoryCache
...AndExpensiveCalculation();
cacheLock.EnterWriteLock(); //This will block till all the Readers flush.
try
{
CacheItemPolicy cip = new CacheItemPolicy()
{
AbsoluteExpiration = new DateTimeOffset(DateTime.Now.AddMinutes(20))
};...
ssh: connect to host github.com port 22: Connection timed out
...dification as you are under a network.(In which case they may deliberately block some ports)
To double check if this is the reason ... do
ssh -T git@github.com
this should timeout.
If that's the case use http protocol instead of ssh this way
just change your url in the config file to http.
Here i...
How to retrieve a file from a server via SFTP?
...
What is that code block after the assignment of session? Is that some fancy Java syntax I've never seen? If so - what does it accomplish being written that way?
– Michael Peterson
Oct 17 '14 at 14:19
...
read file from assets
...s.
ANOTHER EDIT
According to the comment of @Vincent I added the finally block.
Also note that in Java 7 and upper you can use try-with-resources to use the AutoCloseable and Closeable features of recent Java.
CONTEXT
In a comment @LunarWatcher points out that getAssets() is a class in context...
Which Python memory profiler is recommended? [closed]
...ory usage of my Python application and specifically want to know what code blocks/portions or objects are consuming most memory.
Google search shows a commercial one is Python Memory Validator (Windows only).
...
What is the 'instanceof' operator used for in Java?
...me on the right side.
Think about it this way. Say all the houses on your block were built from the same blueprints. Ten houses (objects), one set of blueprints (class definition).
instanceof is a useful tool when you've got a collection of objects and you're not sure what they are. Let's say you'...
Knight's Shortest Path on Chessboard
...gonals, I've only drawn the x >= 0 and y >= x case.
The bottom-left block is the starting position and the numbers in the blocks represent the minimum number of moves to reach those blocks.
There are 3 patterns to notice:
The incrementing blue vertical groups of 4
The "primary" red diagon...
Is volatile expensive?
...now that it will be accessed from multiple threads outside of synchronized blocks. Even then you should consider whether volatile is the best choice versus synchronized, AtomicReference and its friends, the explicit Lock classes, etc.
...
Javascript AES encryption [closed]
...an be used only to encrypt 16 bytes of data. If you want to encrypt bigger block of data you have to extend it yourself to implement intialization vector, encrypt mode (CBC or other...), padding.
– Paolo
Dec 2 '15 at 16:39
...
Understanding dispatch_async
... order in which they are received).
So, if you send 1000 dispatch_async() blocks to DISPATCH_QUEUE_PRIORITY_DEFAULT, those tasks will start executing in the order you sent them into the queue. Likewise for the HIGH, LOW, and BACKGROUND queues. Anything you send into any of these queues is executed ...