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What new capabilities do user-defined literals add to C++?
...1010101010101010101_bits;
// This throws at run time.
std::bitset<64> badbits2("2101010101010101010101010101010101010101010101010101010101010101_bits");
}
The advantage is that a run-time exception is converted to a compile-time error.
You couldn't add the static assert to the bitset c...
Ignoring time zones altogether in Rails and PostgreSQL
...* Timestamps, as well as the h/m/s fields of intervals, are stored as
* int64 values with units of microseconds. (Once upon a time they were
* double values with units of seconds.)
And:
/* Julian-date equivalents of Day 0 in Unix and Postgres reckoning */
#define UNIX_EPOCH_JDATE 24405...
How to highlight text using javascript
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Stefan SteigerStefan Steiger
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Is multiplication and division using shift operators in C actually faster?
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Eric LippertEric Lippert
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How can I add reflection to a C++ application?
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I'm sure the syntax could be improved, and it only works on Win32 and Win64 so far. We've found it really useful for having automatic GUI interfaces to classes, creating properties in C++, streaming to and from XML and so on, and there's no need to derive from a specific base class. If there's eno...
Read/write to Windows registry using Java
...o with this (stackoverflow.com/questions/252297/…). Basically reg.exe is 64-bit whereas JVM may be 32-bit so they could be looking in different places for the key. Workaround is to call twice with both paths
– locka
Jan 20 '14 at 16:45
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How do function pointers in C work?
...ports pshufb, it's slow, so the earlier implementation is still faster. x264/x265 use this extensively, and are open source.
– Peter Cordes
Aug 30 '15 at 2:22
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Which iomanip manipulators are 'sticky'?
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TemplateRex
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answered Oct 7 '09 at 17:56
Martin York...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
... // 2k: 4000
// 4k: 3900 21000
// 16k: 5200
// 32k: 4300
// 64k: 4000 21000
enum { COUNT = (4*1024)/SIZE }; // Some compilers do not accept to use COUNT in private part if COUNT is private
private:
union Chunk {
Chunk* next;
char mem[SIZE];
};
...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...16 |
| 251 | 400 | 273 | 3488 | 1.087649402 |
| 252 | 400 | 274 | 3496 | 1.087301587 |
| 253 | 400 | 282 | 3520 | 1.114624506 |
| 254 | 408 | 279 | 3544 | 1.098425197 ...