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How many threads is too many?
... into a separate thread when the request is received. I do this because almost every request makes a database query. I am using a threadpool library to cut down on construction/destruction of threads.
...
Search for executable files using find command
...ny execute permissions are set": It means that -perm +111 may yield false positives, i.e., files that the current user cannot actually execute. There's no way to emulate -executable by testing permissions alone, because what's needed is to relate the file's user and group identity to the current use...
从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...致时为-1.0。
说明：计算非常慢，有大量排序。针对推荐系统中的数据集来讲，用Spearman秩相关系数作为相似度量是不合适的。
CityBlockSimilarity: 曼哈顿距离相似度
原理：曼哈顿距离的实现，同欧式距离相似，都是用于多维数...
std::string formatting like sprintf
...tream? I'm assuming you have specific reasons to not just do this:
std::ostringstream stringStream;
stringStream << "Hello";
std::string copyOfStr = stringStream.str();
share
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improve...
OAuth secrets in mobile apps
...uth.
If you think about it and ask the question why we have secrets, is mostly for provision and disabling apps. If our secret is compromised, then the provider can only really revoke the entire app. Since we have to embed our secret in the desktop app, we are sorta screwed.
The solution is to h...
Significant new inventions in computing since 1980
This question arose from comments about different kinds of progress in computing over the last 50 years or so.
129 Answer...
What are the minimum margins most printers can handle?
... edited Apr 12 at 2:43
aaronsnoswell
5,41255 gold badges4141 silver badges6363 bronze badges
answered Aug 18 '10 at 15:01
...
Phase • Animations made easy! - Extensions - Kodular Community
...grid;
place-items: center;
backface-visibility: hidden;
position: absolute;
left: 0;
top: 0;
width: 100%;
z-index: 1001;
--animation-state: paused;
}
#d-splash .preloader-image {
max-width: 100%;
height: 100vh;
}
#d-splash...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...ith a Raspberry Pi. When we potentially recover the Raspberry Pi, it will most likely be in a rural location and I'd like to turn off the Pi at that point safely.
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How do I measure time elapsed in Java? [duplicate]
...
Unfortunately, none of the ten answers posted so far are quite right.
If you are measuring elapsed time, and you want it to be correct, you must use System.nanoTime(). You cannot use System.currentTimeMillis(), unless you don't mind your result being wrong.
The ...