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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.
...
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'...
JavaScript + Unicode regexes
...character classes and has no concept of POSIX character classes or Unicode blocks/sub-ranges.
Issues with Unicode in JavaScript regular expressions
Check your expectations here: Javascript RegExp Unicode Character Class tester (Edit: the original page is down, the Internet Archive still has a copy...
Foreign keys in mongo?
...
UPD. I'am using PHP as a programming language, how can I use mongoid, if it is written in Ruby?
– Mark Pegasov
Jun 13 '11 at 17:54
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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 ...
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
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Is it possible to remove inline styles with jQuery?
A jQuery plugin is applying an inline style ( display:block ). I'm feeling lazy and want to override it with display:none .
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Best practices to handle routes for STI subclasses in rails
...Support::Concern
module ClassMethods
def new_with_cast(*args, &block)
if (attrs = args.first).is_a?(Hash)
if klass = descendant_class_from_attrs(attrs)
return klass.new(*args, &block)
end
end
new_without_cast(*args, &block)
end
...
Reliable timer in a console application
...
You can use something like Console.ReadLine() to block the main thread, so other background threads (like timer threads) will still work. You may also use an AutoResetEvent to block the execution, then (when you need to) you can call Set() method on that AutoResetEvent obje...
Easy way to write contents of a Java InputStream to an OutputStream
... stream. This method does not close
either stream.
This method may block indefinitely reading from the
input stream, or writing to the output stream. The behavior for the
case where the input and/or output stream is asynchronously closed, or
the thread interrupted during the transfer, ...