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Why is it slower to iterate over a small string than a small list?
...n a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
3 Answers
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Package objects
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Guillaume Massé
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answered Aug 3 '10 at 21:48
MoritzMoritz
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Resolving ambiguous overload on function pointer and std::function for a lambda using +
... not of arithmetic type etc., but it can be converted:
[expr.prim.lambda]/3
The type of the lambda-expression [...] is a unique, unnamed non-union class type — called the closure type — whose properties are described below.
[expr.prim.lambda]/6
The closure type for a lambda-expression...
How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
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edited Nov 28 '18 at 10:39
Martin Verdejo
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answered ...
Can I list-initialize a vector of move-only type?
...er the in<T> idiom described on cpptruths (cpptruths.blogspot.com/2013/09/…). The idea is to determine lvalue/rvalue at run-time and then call move or copy-construction. in<T> will detect rvalue/lvalue even though the standard interface provided by initializer_list is const reference.
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Access nested dictionary items via a list of keys?
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236
Use reduce() to traverse the dictionary:
from functools import reduce # forward compatibility ...
typeof for RegExp
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edited Nov 27 '18 at 6:34
Alexis Wilke
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answer...
Why can templates only be implemented in the header file?
...athanOliver
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answered Jan 30 '09 at 10:26
Luc TourailleLuc Touraille
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c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术
...e <windows.h>
#include <atlstr.h>
#pragma comment(lib, "version")
int _tmain(int argc, _TCHAR* argv[])
{
LPCTSTR lpszModuleName = _T("C:\\Windows\\notepad.exe");
// Get the version information size for allocate the buffer
DWORD dwHandle;
DWORD dwDataSize = ::GetFileVersionIn...
Scala: What is a TypeTag and how do I use it?
...List[Foo] => "list of foos"
}
we will get warnings:
<console>:23: warning: non-variable type argument String in type pattern List[String]↩
is unchecked since it is eliminated by erasure
case _: List[String] => "list of strings"
^
<console>:24: warning...