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What are rvalues, lvalues, xvalues, glvalues, and prvalues?
In C++03, an expression is either an rvalue or an lvalue .
11 Answers
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In the shell, what does “ 2>&1 ” mean?
...hell, if I want to combine stderr and stdout into the stdout stream for further manipulation, I can append the following on the end of my command:
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Logic to test that 3 of 4 are True
...s to be true, it seems natural to me that the value 3 appears somewhere.
For instance, in C++:
if ((int)a + (int)b + (int)c + (int)d == 3)
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This is well defined in C++: the standard (§4.7/4) indicates that converting bool to int gives the expected values 0 or 1.
In Java and C#, you can ...
RESTfully design /login or /register resources?
...d to think about how my api should be designed as a RESTful web service. For now, most of my URI's are generic and might apply to various web apps:
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Determine if two rectangles overlap each other?
... to the x and the y axis, that is all of their edges will have slopes of 0 or infinity.
23 Answers
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Section vs Article HTML5
... as HTML5 <section> s, but on further inspection it looks they the more correct tag would be <article> . Could anyone shed some light on this for me?
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How does “do something OR DIE()” work in PHP?
I'm writing a php app to access a MySQL database, and on a tutorial, it says something of the form
4 Answers
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Regex empty string or email
...tring. Is this possible through Regex only? Accepting either empty string or email only? I want to have this on Regex only.
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CAP theorem - Availability and Partition Tolerance
...onsistency means that data is the same across the cluster, so you can read or write from/to any node and get the same data.
Availability means the ability to access the cluster even if a node in the cluster goes down.
Partition tolerance means that the cluster continues to function even if there i...
When to use NSInteger vs. int
When should I be using NSInteger vs. int when developing for iOS? I see in the Apple sample code they use NSInteger (or NSUInteger ) when passing a value as an argument to a function or returning a value from a function.
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