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When to use “new” and when not to, in C++? [duplicate]
When should I use the "new" operator in C++? I'm coming from C#/Java background and instantiating objects is confusing for me.
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C++11 std::threads vs posix threads
...her abstraction level, a really good interface and plays nicely with other C++11 classes.
The C++11 std::thread class unfortunately doesn't work reliably (yet) on every platform, even if C++11 seems available. For instance in native Android std::thread or Win64 it just does not work or has severe p...
Why don't structs support inheritance?
... "inline storage" behavior of arrays, Bad Things happen, as can be seen in C++.
Consider this pseudo-C# code:
struct Base
{
public int A;
}
struct Derived : Base
{
public int B;
}
void Square(Base[] values)
{
for (int i = 0; i < values.Length; ++i)
values [i].A *= 2;
}
Derive...
How can I reliably get an object's address when operator& is overloaded?
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Update: in C++11, one may use std::addressof instead of boost::addressof.
Let us first copy the code from Boost, minus the compiler work around bits:
template<class T>
struct addr_impl_ref
{
T & v_;
inline addr_impl_r...
Why is enum class preferred over plain enum?
I heard a few people recommending to use enum classes in C++ because of their type safety .
9 Answers
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Which Boost features overlap with C++11?
I put my C++ skills on the shelf several years ago and it seems now, when I need them again, the landscape has changed.
2 A...
Are static class variables possible in Python?
...4
>>> MyClass.i, m.i
>>> (3, 4)
This is different from C++ and Java, but not so different from C#, where a static member can't be accessed using a reference to an instance.
See what the Python tutorial has to say on the subject of classes and class objects.
@Steve Johnson has a...
How to convert an xml string to a dictionary?
...: '1', 'c': 'three', 'b': '2.2'}}
There are tools for converting in both C++ and Python: the C++ and Python do indentical conversion, but the C++ is about 60x faster
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Why is processing a sorted array slower than an unsorted array?
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Good reason why everything you learn in C/C++ doesn't apply verbatim to a language like C#!
– user541686
Dec 24 '12 at 17:48
38
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With arrays, why is it the case that a[5] == 5[a]?
...ve integer type.
in which case both i + p and i[p] would be illegal.
In C++ terms, we really have two sets of overloaded + operators, which can be loosely described as:
pointer operator+(pointer p, integer i);
and
pointer operator+(integer i, pointer p);
of which only the first is really ne...