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创业 比“直男癌”更可怕的是“技术癌” - 资讯 - 清泛网 - 专注C/C++及内核技术
...绩。但是聪明的国人则更近了一步，用几十元的自拍杆+免费的App美图秀秀的组合轻松达到了同样的目的。
然而更进一步分析发现：自拍杆和美图秀秀这对黄金搭档的市场表现迥异，引人深思。自拍杆的生产壁垒低，所以生产厂...
What is a sealed trait?
... case class Point2D(x: Double, y: Double) extends Point
case class Point3D(x: Double, y: Double, z: Double) extends Point
def hypotenuse(p: Point) = p match {
case Point2D(x, y) => math.sqrt(x x + y y)
case Point3D(x, y, z) => math.sqrt(x x + y y + z z)
}
val points: Ar...
Error: free(): invalid next size (fast):
...esizes it. Adding the assert here caught it:
void Logo::add(const QVector3D &v, const QVector3D &n)
{
GLfloat *p = m_data.data() + m_count;
*p++ = v.x();
*p++ = v.y();
*p++ = v.z();
*p++ = n.x();
*p++ = n.y();
*p++ = n.z();
m_count += 6;
Q_ASSERT( m_count <= m_data.size() );
}
...
为什么我们程序员写不出好代码？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...到。利用最新的工具是可以带来很好的结果，但天下没有免费午餐，并且会为此付出足够多的学习成本。
程序员 代码
What is the best open-source java charting library? (other than jfreechart) [closed]
...
You can try Jzy3d. It helps drawing simple 3d charts (surfaces, scatters, bars, etc), and has lot of options for customizing layout of axes, ticks, etc. There are lot of examples and a documentation on the wiki.
It's free and open source.
...
CSS: center element within a element
...te;
left: 50%;
top: 50%;
transform: translate(-50%,-50%);
/* or 3d alternative if you will add animations (smoother transitions) */
transform: translate3d(-50%,-50%,0);
/* Other styling stuff */
width: 100px;
height: 100px;
background-color: #f1c40f;
}
<div class="flex-cont...
Retrieve a single file from a repository
.../master/folder2/myfile.py?token=DDDDnkl92Kw8829jhXXoxBaVJIYW-h7zks5Vy9I-wA%3D%3D' -O myfile.py
Curl example:
curl 'https://example.com/raw.txt' > savedFile.txt
share
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improve this answer
...
Encode URL in JavaScript?
...est to use qs npm package
qs.stringify({a:"1=2", b:"Test 1"}); // gets a=1%3D2&b=Test+1
it is easier to use with JS object and it gives you proper URL encoding for all parameters
If you are using jQuery I would go for $.param method. It URL encodes an object mapping fields to values, which is e...
What is recursion and when should I use it?
...e len)
{
if (len > 0.002)
{
mesh.Positions.Add(new Point3D(x, y + len, -len));
mesh.Positions.Add(new Point3D(x - len, y - len, -len));
mesh.Positions.Add(new Point3D(x + len, y - len, -len));
len *= 0.5;
BuildVertices(x, y + len, len);
Buil...
离开1号店 于刚再创业钟情“互联网+” - 资讯 - 清泛网 - 专注C/C++及内核技术
...诊、医疗及用药指导等服务的应用，旨在为全球华人提供免费优质的移动医疗服务，解决用户看病难、看病贵、耗时长、感受差等问题。
对于这个全新创业领域的市场前景，于刚给出了美国市场目前的巨大数据：“3万亿美元”...