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What are the mechanics of short string optimization in libc++?
...th:
1 bit goes to the long/short flag.
7 bits goes to the size.
Assuming char, 1 byte goes to the trailing null (libc++ will always store a trailing null behind the data).
This leaves 3 words minus 2 bytes to store a short string (i.e. largest capacity() without an allocation).
On a 32 bit mach...
Stop the 'Ding' when pressing Enter
...ecutes. The only thing that happens is all the Text in the TextBox becomes selected (and I don't even have code that selects any text)
– bendr
Jun 9 '11 at 10:15
1
...
What is the list of valid @SuppressWarnings warning names in Java?
...ust go to the location where you have the warning and type Alt-Enter
(or select it in the Inspections list if you are seeing it there).
When the menu comes up, showing the warning and offering to fix it for
you (e.g. if the warning is "Method may be static" then "make static"
is IntellJ's of...
Passing variable arguments to another function that accepts a variable argument list
...#include <stdio.h>
template<typename... Args> void test(const char * f, Args... args) {
printf(f, args...);
}
int main()
{
int a = 2;
test("%s\n", "test");
test("%s %d %d %p\n", "second test", 2, a, &a);
}
At the very least, it works with g++.
...
Why does appending “” to a String save memory?
...s that substring() gives a window onto an existing String - or rather, the character array underlying the original String. Hence it will consume the same memory as the original String. This can be advantageous in some circumstances, but problematic if you want to get a substring and dispose of the o...
What differences, if any, between C++03 and C++11 can be detected at run-time?
...zeof(b);
}
Also, the fact that string literals do not anymore convert to char*
bool isCpp0xImpl(...) { return true; }
bool isCpp0xImpl(char*) { return false; }
bool isCpp0x() { return isCpp0xImpl(""); }
I don't know how likely you are to have this working on a real implementation though. One t...
mfc110d.dll!ATL::CSimpleStringT::~CSimpleStringT() 行 291 - 更多技术 -...
...ATL::CStringData::Release() 行 118 C++
mfc110d.dll!ATL::CSimpleStringT<char,1>::~CSimpleStringT<char,1>() 行 291 C++
mfc110d.dll!ATL::CStringT<char,StrTraitMFC_DLL<char,ATL::ChTraitsCRT<char> > >::~CStringT<char,StrTraitMFC_DLL<char,ATL::ChTraitsCRT<char> > >() 行 1241 C++
...
报错...
How to compare dates in datetime fields in Postgresql?
... manipulation on the input string, correct? you don't need to be afraid:
SELECT *
FROM table
WHERE update_date >= '2013-05-03'::date
AND update_date < ('2013-05-03'::date + '1 day'::interval);
share
|
...
When is CRC more appropriate to use than MD5/SHA1?
... inappropriate CRC hashes are for hash tables. It also explains the actual characteristics of the algorithm. The study also includes evaluation of other hash algorithms and is a good reference to keep.
The relevant conclusion on CRC for hashes:
CRC32 was never intended for hash table use. There...
INT 10H 中断介绍 - C/C++ - 清泛网 - 专注C/C++及内核技术
...始行列
BH = 页号
AL = 0，BL = 属性
串：Char，char，……，char
AL = 1，BL = 属性
串：Char，char，……，char
AL = 2
串：Char，attr，……，char，attr
AL = 3
串：Char，attr，……，char...