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Tree data structure in C#
...ngs have changed but right now the book is freely available to download as PDF from the C5 site.
– Oskar
Aug 6 '09 at 12:10
4
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MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...分内存是可回收的，操作系统的虚拟内存管理器会按照LRU算法淘汰冷数据。还有一个buffers，也是可回收的，不过它是保留给块设备使用的。
知道了原理，我们就可以推算出系统可用的内存是free + buffers + cached：
shell> echo $((272...
phantomjs not waiting for “full” page load
...e [paperwidth*paperheight|paperformat] [zoom]');
console.log(' paper (pdf output) examples: "5in*7.5in", "10cm*20cm", "A4", "Letter"');
phantom.exit(1);
} else {
address = system.args[1];
output = system.args[2];
if (system.args.length > 3 && system.args[2].substr(-4)...
Eclipse HotKey: how to switch between tabs?
...thers Short Cuts
Link : http://www.shortcutworld.com/en/win/Eclipse.html
Pdf : http://eclipse-tools.sourceforge.net/Keyboard_shortcuts_%283.0%29.pdf
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What's the status of multicore programming in Haskell?
...el Haskell
Google published their experience report on the use of Haskell (PDF)
Intel announced the Concurrent Collections for Haskell library, including scalability numbers -- scaling results for 32 and 48 cores
Sun/Oracle bought us a machine and funded work on improving parallel performance.
Recen...
How to fix the aspect ratio in ggplot?
...unding box.
(I also suggest you use ggsave to save your resulting plot to pdf/png/etc, rather than the pdf(); print(p); dev.off() sequence.)
library(ggplot2)
df <- data.frame(
x = runif(100, 0, 5),
y = runif(100, 0, 5))
ggplot(df, aes(x=x, y=y)) + geom_point() + coord_fixed()
...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...面数据通信的网络包，不过这一问题应该是可以通过优化算法得到解决的，但需要对官方的固件进行逆向或自己根据Nordic公司提供的BLE协议栈重写代码。。
优点：
价格便宜，USB Dongle淘宝价70元左右，整套开发板售价...
What is an intuitive explanation of the Expectation Maximization technique? [closed]
...er guesses:
likelihood_of_red = stats.norm(red_mean_guess, red_std_guess).pdf(both_colours)
likelihood_of_blue = stats.norm(blue_mean_guess, blue_std_guess).pdf(both_colours)
Here, we have simply put each data point into the probability density function for a normal distribution using our current...
Folder structure for a Node.js project
...ets, client-side JavaScript)
/assets/images contains image files
/assets/pdf contains static pdf files
/css contains style sheets (or compiled output by a css engine)
/js contains client side JavaScript
/controllers contain all your express routes, separated by module/area of your application (no...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...，BASE64编码/解码
【AES加解密】MareshaAES 拓展：AES加解密算法
【CRC校验】App Inventor 2 CRC16 拓展
【二进制】UrsAI2ByteArray 字节数组扩展：读写二进制数据
【数据库】LeanDB 数据库扩展
【数据库】MySQL + php后端数据库
【数据...