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round() for float in C++
...according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf)
#include <cmath>
#include <iostream>
int main(int argc, char** argv) {
std::cout << "round(0.5):\t" << round(0.5) << std::endl;
std::cout << "round(-0.5):\t" << round(-0.5)...
Why is MATLAB so fast in matrix multiplication?
...erx.ist.psu.edu/viewdoc/download?doi=10.1.1.140.1785&rep=rep1&type=pdf
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What algorithms compute directions from point A to point B on a map?
...roven for correctness:
http://algo2.iti.uka.de/schultes/hwy/schultes_diss.pdf
Here's a google tech talk on the subject:
http://www.youtube.com/watch?v=-0ErpE8tQbw
Here's a implementation of the highway-hierarchies algorithm as discussed by schultes (currently in berlin only, I'm writing the inte...
How to use phpexcel to read data and insert into database?
...ere I want to read data from excel, Insert into database and then generate pdf reports for specific users.
I searched a lot but nothing specific given about both things.
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URL encoding the space character: + or %20?
...seen "+" in some Web APIs which don't respond with HTML e.g. you request a pdf. I consider it wrong that they dont use "%20".
– The incredible Jan
Oct 12 '17 at 14:09
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Weighted random numbers
...but there is an algorithm of the same name. sirkan.iit.bme.hu/~szirmay/c29.pdf and en.wikipedia.org/wiki/Photon_mapping A Monte Carlo method called Russian roulette is used to choose one of these actions it comes up in buckets when googling for it. "russian roulette algorithm". You could argue that ...
Which characters are valid/invalid in a JSON key name?
..., etc? The both json.org and the linked official/formal ECMA specification PDF seem to imply that yes, those are valid in JSON, even in their literal forms (not just in the \u four-hex-digits form).
– mtraceur
Jun 16 '16 at 13:13
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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是不是像一个C++的类？）这种玩法英文叫：Flexible Array，中文翻译叫：柔性数组。
我们来用gdb看一下：
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(gdb) p thisline
$1 = (struct line *) 0x601010
(gdb) p *thisline
$2 = {length = 10, contents = 0...
'float' vs. 'double' precision
... Section 5.2.4.2.2 ( http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf )
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What is PostgreSQL explain telling me exactly?
...
Explaining_EXPLAIN.pdf could help too.
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