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What does value & 0xff do in Java?
... not quite. The & operator works on long values as well, if either operand is a long. But not on byte. See the Java Language Specification, sections 15.22.1 and 5.6.2.
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std::function and std::bind: what are they, and when should they be used?
I know what functors are and when to use them with std algorithms, but I haven't understood what Stroustrup says about them in the C++11 FAQ .
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Python function overloading
...what you want in python.
Why Not Overloading?
First, one needs to understand the concept of overloading and why it's not applicable to python.
When working with languages that can discriminate data types at
compile-time, selecting among the alternatives can occur at
compile-time. The act o...
Dealing with “Xerces hell” in Java/Maven?
... users are "touched" by this problem at some point. Unfortunately, understanding the problem requires a bit of knowledge about the history of Xerces...
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What is the relative performance difference of if/else versus switch statement in Java?
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That's micro optimization and premature optimization, which are evil. Rather worry about readabililty and maintainability of the code in question. If there are more than two if/else blocks glued together or its size is unpredictable, then you may high...
Why use bzero over memset?
...ucts, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and not memset to initialize them. He never explained why, and I'm curious if there is a valid reason for this?
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How to unit test a Node.js module that requires other modules and how to mock the global require fun
...a very simple api which allows resolving the module you are trying to test and pass along mocks/stubs for its required modules in one simple step.
@Raynos is right that traditionally you had to resort to not very ideal solutions in order to achieve that or do bottom-up development instead
Which is...
Rails formatting date
I am posting a date to an API and the required format is as follows:
4 Answers
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Remove all the elements that occur in one list from another
Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 .
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How can I truncate a datetime in SQL Server?
...at's the best way to truncate a datetime value (as to remove hours minutes and seconds) in SQL Server 2008?
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