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Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Nginx url重写rewrite实例详解Nginx_url_rewrite在nginx中实现url重写，学习rewrite的具体用法，包括301重定向的内容等，希望对大家有所帮助。nginx rewrite 实现二级域名跳转
当访问http://www.jbyuan.com跳转到http://www.jbyuan.com/nvxingjiankang/
方法...
区块链技术到底是什么鬼，为何被疯炒？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...风投基金竞相追捧的热门项目。仅2015年,全球范围内投资在比特币和区块链相关的初创公司的风投资金规模就达到了约4.8亿美元,2016年第一季度已达到1.6亿美元,由此可见其增长趋势。如图：
(图1：比特币/区块链年度风投资金规...
Nginx url重写rewrite实例详解 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
Nginx url重写rewrite实例详解Nginx_url_rewrite在nginx中实现url重写，学习rewrite的具体用法，包括301重定向的内容等，希望对大家有所帮助。nginx rewrite 实现二级域名跳转
当访问http://www.jbyuan.com跳转到http://www.jbyuan.com/nvxingjiankang/
方法...
How do I replace NA values with zeros in an R dataframe?
...fill(df, fill=0)}
The code for this analysis:
library(microbenchmark)
# 20% NA filled dataframe of 10 Million rows and 10 columns
set.seed(42) # to recreate the exact dataframe
dfN <- as.data.frame(matrix(sample(c(NA, as.numeric(1:4)), 1e7*10, replace = TRUE),
dimna...
Disadvantages of Test Driven Development? [closed]
...ime at the end):
Big time investment. For the simple case you lose about 20% of the actual implementation, but for complicated cases you lose much more.
Additional Complexity. For complex cases your test cases are harder to calculate, I'd suggest in cases like that to try and use automatic referen...
How much does it cost to develop an iPhone application? [closed]
...imes lower price ... It still amuses me people expect the same quality for 20% of the price they usually pay :)
– Marin Todorov
May 18 '11 at 14:59
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How can I profile C++ code running on Linux?
... stack. If there is some code that is wasting some percentage of the time, 20% or 50% or whatever, that is the probability that you will catch it in the act on each sample. So, that is roughly the percentage of samples on which you will see it. There is no educated guesswork required. If you do have...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...道），用于两个连接的设备间的通讯。
0x2 BLE数据包格式在低功耗蓝牙规范中，分广播报文和数据报文这两种。设备利用广播报文发现、连接其它设备，而在连接建立之后，便开始使用数据报文。无论是广播报文还是数据报文，...
What is more efficient? Using pow to square or just multiply it with itself?
...eed a stopwatch to even notice that. (I guess in most cases anything under 20% speedup goes unnoticed for most users. And that is four such spots you need to find.)
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程序员之网络安全系列（二）：如何安全保存用户密码及哈希算法 - 更多技术 ...
...安全系列（二）：如何安全保存用户密码及哈希算法前言在很多网站的早期，甚至是现在仍然有一些网站，当你点击忘记密码功能时，你的邮箱会收到一封邮件，然后里面赫然写着你的密码，很多普通...前言
在很多网站的早期...