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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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AsyncProcedures异步过程扩展 · App Inventor 2 中文网
... 需要一定时间的网络操作
复杂计算: 耗时的数学计算或算法处理
批量操作: 需要循环执行的批量任务
典型应用案例
数据加载: 从数据库或文件加载大量数据
图像处理: 批量处理图像文件
列表操作: 对...
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)...
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...
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()
...
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...
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...
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...