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What is the best way to use a HashMap in C++?
... with unordered_map).
The unordered_map container was introduced with the C++11 standard revision. Thus, depending on your compiler, you have to enable C++11 features (e.g. when using GCC 4.8 you have to add -std=c++11 to the CXXFLAGS).
Even before the C++11 release GCC supported unordered_map - i...
What ReSharper 4+ live templates for C# do you use? [closed]
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How did that transition from C++ to C# treat you?
– Ty.
Oct 1 '09 at 13:58
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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
11
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Is JavaScript a pass-by-reference or pass-by-value language?
...ather than just failing. Try assigning a new value to a const reference in C++ and the compiler rejects it. In user terms, that's the difference between pass by value and pass by const reference.
– deworde
Jul 18 '11 at 8:56
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Compiling simple Hello World program on OS X via command line
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Try
g++ hw.cpp
./a.out
g++ is the C++ compiler frontend to GCC.
gcc is the C compiler frontend to GCC.
Yes, Xcode is definitely an option. It is a GUI IDE that is built on-top of GCC.
Though I prefer a slightly more verbose approach:
#include <iostream&...
How to declare strings in C [duplicate]
... = "String"; while dangerous is not wrong and it is valid in C (but not in C++)
– ouah
Jan 4 '12 at 19:05
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TypeError: Missing 1 required positional argument: 'self'
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The self keyword in Python is analogous to this keyword in C++ / Java / C#.
In Python 2 it is done implicitly by the compiler (yes Python does compilation internally).
It's just that in Python 3 you need to mention it explicitly in the constructor and member functions. example:
clas...
Using @property versus getters and setters
...e where e.g. a simple tuple would do, but it's code from people writing in C++ or Java using Python.
That's not Python code.
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What exactly is a reentrant function?
... does it always mean that it is reentrant?
No.
For example, let's have a C++ function that takes both a lock, and a callback as a parameter:
#include <mutex>
typedef void (*callback)();
std::mutex m;
void foo(callback f)
{
m.lock();
// use the resource protected by the mutex
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Recommended way to insert elements into map [duplicate]
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Actually, it's vice versa, at least in GNU libstdc++: operator[] looks for existing element and calls insert with default constructed value if not found.
– vaclav.blazek
Mar 6 at 10:39
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