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What is the difference between atomic / volatile / synchronized?
...return counter++;
}
It basically reads value from memory, increments it and puts back to memory. This works in single thread but nowadays, in the era of multi-core, multi-CPU, multi-level caches it won't work correctly. First of all it introduces race condition (several threads can read the value...
Which cryptographic hash function should I choose?
...Indeed, MD5 is often still used in applications where the smaller key size and speed are beneficial. That said, due to its flaws, researchers recommend the use of other hash functions in new scenarios.
SHA1 has a flaw that allows collisions to be found in theoretically far less than the 2^80 steps ...
Multithreading: What is the point of more threads than cores?
...nterruption. In reality this isn't the case. Even if you have four cores and four working threads, your process and it threads will constantly be being switched out for other processes and threads. If you are running any modern OS, every process has at least one thread, and many have more. All t...
What's the difference between Require.js and simply creating a element in the DOM? [closed]
...e farther from the truth. It definitely has a steep learning curve for you and anyone else who will come to work in that project.
– Sahat Yalkabov
Sep 30 '13 at 3:06
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When to use -retainCount?
I would like to know in what situation did you use -retainCount so far, and eventually the problems that can happen using it.
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UnboundLocalError on local variable when reassigned after first use
The following code works as expected in both Python 2.5 and 3.0:
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Differences between hard real-time, soft real-time, and firm real-time?
I have read the definitions for the different notions of real-time , and the examples provided for hard and soft real-time systems make sense to me. But, there is no real explanation or example of a firm real-time system. According to the link above:
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Must JDBC Resultsets and Statements be closed separately although the Connection is closed afterward
.... But if I have the following code, is it necessary to close the Resultset and the Statement?
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How to declare global variables in Android?
I am creating an application which requires login. I created the main and the login activity.
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AngularJs “controller as” syntax - clarification?
...here a property comes from is really useful too.
You can nest controllers and when reading the html it is pretty clear where every property comes.
You can also avoid some of the dot rule problems.
For example, having two controllers, both with the same name 'name', You can do this:
<body ng-c...