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How can I view the source code for a function?
...repository or Winston Chang's github mirror.
Uwe Ligges's R news article (PDF) (p. 43) is a good general reference of how to view the source code for .Internal and .Primitive functions. The basic steps are to first look for the function name in src/main/names.c and then search for the "C-entry" na...
Is “inline” without “static” or “extern” ever useful in C99?
...se Google to find links: open-std.org/jtc1/sc22/wg14/www/C99RationaleV5.10.pdf
– Sven Marnach
Jun 10 '11 at 23:27
...
In which order should floats be added to get the most precise result?
...ere are still brick-and-mortar libraries around. Alternatively, buying the PDF online costs $5-$15 (depending on whether you're an ACM member). Lastly, DeepDyve seem to be offering to lend the paper for 24 hours for $2.99 (if you're new to DeepDyve, you might even be able to get it for free as part ...
Skip List vs. Binary Search Tree
...mentations. I'll summarize their findings. It's worth it to download the pdf as it has some very informative graphs on pages 50, 53, and 54.
Locking skip lists are insanely fast. They scale incredibly well with the number of concurrent accesses. This is what makes skip lists special, other loc...
The Definitive C++ Book Guide and List
...t are likely to be included in C++20.
Overview of the New C++ (C++11/14) (PDF only) (Scott Meyers) (updated for C++14) These are the presentation materials (slides and some lecture notes) of a three-day training course offered by Scott Meyers, who's a highly respected author on C++. Even though the...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...
@PeterCordes microarchitecture.pdf: This gives a delay of 5 - 6 clocks. The reason is that a temporary register has been assigned to AL to make it independent of AH. The execution unit has to wait until the write to AL has retired before it is possible to ...
Convert light frequency to RGB?
... color component transfer function is taken from http://www.color.org/srgb.pdf, which
* follows the International Electrotechnical Commission standard IEC 61966-2-1 "Multimedia systems and equipment -
* Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sR...
Is it better to use std::memcpy() or std::copy() in terms to performance?
...do exactly what you ask.
See this presentation on compiler optimisations (pdf).
Here's what GCC does for a simple std::copy of a POD type.
#include <algorithm>
struct foo
{
int x, y;
};
void bar(foo* a, foo* b, size_t n)
{
std::copy(a, a + n, b);
}
Here's the disassembly (with o...
How to upload files to server using JSP/Servlet?
...ces have failed hard in this, such as roseindia.net. See also uploading of pdf file. You should rather use a real library which is used (and implicitly tested!) by millions of users for years. Such a library has proven its robustness.
When you're already on Servlet 3.0 or newer, use native API
If ...
Which characters make a URL invalid?
...ia.org/wiki/Möbius_strip or
https://zh.wikipedia.org/wiki/Wikipedia:关于中文维基百科/en.
First, a digression into terminology. What are these addresses? Are they valid URLs?
Historically, the answer was "no". According to RFC 3986, from 2005, such addresses are not URIs (and therefore no...