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Why can templates only be implemented in the header file?
... do stuff using T */}
};
// somewhere in a .cpp
Foo<int> f;
When reading this line, the compiler will create a new class (let's call it FooInt), which is equivalent to the following:
struct FooInt
{
int bar;
void doSomething(int param) {/* do stuff using int */}
}
Consequently, ...
valueOf() vs. toString() in Javascript
...
Shouldn't the conditional in the "actually" block read "if(pa is string && pb is string)"? I.e "&&" instead of "||" ?
– brainjam
Mar 21 '10 at 15:23
...
Delete an element from a dictionary
...
This answer has a weakness, it could be misleading. Readers may misunderstand that dict(d) can give them a copy with 'd'. But it's an incomplete copy. When only doing del keys operations, that's OK. But when you want to do something else to a nested dict, modifying 'r' using t...
Does static constexpr variable inside a function make sense?
...a single instance of it; it is free to generate a single instance of it in read-only storage.
So you should definitely use static constexpr in your example.
However, there is one case where you wouldn't want to use static constexpr. Unless a constexpr declared object is either ODR-used or declared...
How to delete a folder with files using Java
... This will throw a NullPointerException if there is an I/O exception while reading the directory. The code should check whether entries is null.
– mernst
Oct 31 '17 at 23:55
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What breaking changes are introduced in C++11?
..._t, char32_t, constexpr, decltype, noexcept, nullptr, static_assert, and thread_local
Certain integer literals larger than can be represented by long could change from an unsigned integer type to signed long long.
Valid C++ 2003 code that uses integer division rounds the result toward ...
What Git branching models work for you?
...veral (because it ended up being too complex a feature), none (because not ready in time for release), another feature (because the original one had "morphed"),...
Only an "integrator" should established official feature branches on a "central" repo, which can then be fetched by developers to rebas...
How to avoid using Select in Excel VBA
...")
v = ActiveWorkbook.Sheets(1).Range("A1").Value
Workbooks("SomeAlreadyOpenBook.xlsx").Activate
ActiveWorkbook.Sheets("SomeSheet").Range("A1").Value = v
Workbooks(2).Activate
ActiveWorkbook.Close()
End Sub
And would be better like:
Sub foo()
Dim v as Variant
Dim wb1 a...
C++ unordered_map using a custom class type as the key
...est of all – by overloading operator==() for your key type (as you did already).
The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash values for the individual members, and then somehow combine them int...
How do I reformat HTML code using Sublime Text 2?
...y reformat HTML code in Sublime Text 2 so it looks better and is easier to read?
15 Answers
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