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Why can't I use float value as a template parameter?
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The current C++ standard does not allow float (i.e. real number) or character string literals to be used as template non-type parameters. You can of course use the float and char * types as normal arguments.
Perhaps the author is using...
“Unknown class in Interface Builder file” error at runtime
... by default, which will keep all of the symbols. But I had started with a C++ target, and didn't have that. Nevertheless, I found a way around this, which keeps the linker aggressive.
The hack I was originally using was to add an empty static routine like:
+(void)_keepAtLinkTime;
which does no...
Difference between abstraction and encapsulation?
...ually always uses encapsulation. However, the above does actually exist in C++(14), via variable templates (= generic templates for variables); with a slightly more complex syntax, e.g.:
template <typename T> constexpr T pi = T{3.1415926535};
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Example for boost shared_mutex (multiple reads/one write)?
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This is my first time using boost, and I'm a C++ newbie, so maybe there's something I'm missing -- but in my own code, I had to specify the type, like so: boost::shared_lock<shared_mutex> lock(_access);
– Ken Smith
Mar 1...
Facebook Architecture [closed]
... task. Hiphop only supports so much, it can't simply convert everything to C++. So what does this tell us? Well, it tells us that Facebook is NOT fully taking advantage of the PHP language. It's not using the latest 5.3 and I'm willing to bet there's still a lot that is PHP 4 compatible. Otherwise, ...
Iteration over std::vector: unsigned vs signed index variable
What is the correct way of iterating over a vector in C++?
17 Answers
17
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Can you write virtual functions / methods in Java?
Is it possible to write virtual methods in Java, as one would do in C++?
6 Answers
6...
How to get std::vector pointer to the raw data?
...dress of the element pointed to by the iterator returned by begin()).
In C++11, a new member function was added to std::vector: data(). This member function returns the address of the initial element in the container, just like &something.front(). The advantage of this member function is th...
Swift Beta performance: sorting arrays
...gs that I get:
Swift 4.0.2 : 0.83s (0.74s with `-Ounchecked`)
C++ (Apple LLVM 8.0.0): 0.74s
Swift
// Swift 4.0 code
import Foundation
func doTest() -> Void {
let arraySize = 10000000
var randomNumbers = [UInt32]()
for _ in 0..<arraySize {
randomNumbers.a...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
... and forget you ever had it. It's much faster to write than the equivalent C++ code, and it will only ever run once, so you get O(1) runtime in your C++ code.
– wilhelmtell
Apr 8 '10 at 21:32
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