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RESTful web service - how to authenticate requests from other services?
...
+100
Any solution to this problem boils down to a shared secret. I also don't like the hard-coded user-name and password option but it do...
Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
... arraySize; ++c)
if (data[c] >= 128)
for (int i = 0; i < 100000; ++i)
sum += data[c];
into
for (int c = 0; c < arraySize; ++c)
if (data[c] >= 128)
sum += 100000 * data[c];
because the latter could lead to overflow of signed integers where the form...
如何编写一个独立的 PHP 扩展（译） - 更多技术 - 清泛网 - 专注C/C++及内核技术
如何编写一个独立的 PHP 扩展（译）how-to-create-a-php-extension本文翻译自 PHP 源码中的 README.SELF-CONTAINED-EXTENSIONS。文中标记了注的内容均为自己添加。内容有点老，也挺啰嗦，没讲什么深入的...本文翻译自 PHP 源码中的 README.SELF-CONTAI...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...pp"来调用.
#include <iostream>
#include <boost/asio.hpp>
此外,这个示例用到了timer,我们还要包含Boost.Date_Time的头文件来控制时间.
#include <boost/date_time/posix_time/posix_time.hpp>
使用asio至少需要一个boost::asio::io_service对象.该类提供了访问I/O...
How do I calculate a point on a circle’s circumference?
... return [ x, y ];
}
Usage:
const [ x, y ] = pointsOnCircle({ radius: 100, angle: 180, cx: 150, cy: 150 });
console.log( x, y );
Codepen
/**
* Calculate x and y in circle's circumference
* @param {Object} input - The input parameters
* @param {number} input.radius - The circle's ra...
Center image in div horizontally [duplicate]
...ide image" />
</div>
</div>
CSS
img
{
max-width: 100%;
max-height: 100%;
display: block;
margin: auto auto;
}
.outer
{
border: 1px solid #888;
width: 100px;
height: 100px;
}
.inner
{
display:table-cell;
height: 100px;
width: 100px;
...
How to get indices of a sorted array in Python
...
Something like next:
>>> myList = [1, 2, 3, 100, 5]
>>> [i[0] for i in sorted(enumerate(myList), key=lambda x:x[1])]
[0, 1, 2, 4, 3]
enumerate(myList) gives you a list containing tuples of (index, value):
[(0, 1), (1, 2), (2, 3), (3, 100), (4, 5)]
You sor...
How to make a great R reproducible example
...
Example:
# sample data
DF <- data.frame(id=rep(LETTERS, each=4)[1:100], replicate(100, sample(1001, 100)), Class=sample(c("Yes", "No"), 100, TRUE))
DF is about 100 x 102. I want to sample 10 rows, and a few specific columns
reproduce(DF, cols=c("id", "X1", "X73", "Class")) # I could al...
Canvas width and height in HTML5
...fff; border:1px solid #ccc; width:400px; height:160px }
<canvas width="100" height="40"></canvas>
<p>Showing that re-drawing the same antialiased lines does not obliterate old antialiased lines.</p>
...
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库git-submodule有种情况我们经常会遇到：某个工作中的项目需要包含并使用另一个项目。 也许是第三方库，或者你独立开发的，用于多个父项目的库。 现在问题来了：你想要把它...