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What is “entropy and information gain”?
...rees (nor is it guaranteed to be globally-optimal one w.r.t classification error). This is in fact an NP-complete problem...
– Amro
May 29 '15 at 15:16
1
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Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
...add my solution as it may helpful for others in the future..
A common key error is: Permission denied (publickey). You can fix this by using keys:add to notify Heroku of your new key.
In short follow these steps: https://devcenter.heroku.com/articles/keys
First you have to create a key if you don...
PHP convert date format dd/mm/yyyy => yyyy-mm-dd [duplicate]
...
This looks okay but isn't. 05/04/2045 will assume American and give the 4th of May instead of the 4th of April. It's an intermittant and dangerous mistake - as per hjpotter. This answer should be marked as wrong.
– Tim Ogilvy
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淘宝网采用什么技术架构来实现网站高负载的 - 更多技术 - 清泛网 - 专注C/C...
...session管理来完成，说具体点就是多个无状态的应用节点连接一个session 服 务器，session服 务器将session保 存到缓存中，session服 务器后端再配有底层持久性数据源，比如数据库，文件系统等等。
二、有效使用缓存(Tair)
做互联网...
对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...都使用
FreeBSD6.2Release + Squid2.6，一级代理直接和外网线路连接，用户通过设置相应的网段IP和代理服务器（IE上设置）进行上网。一级代理服务器后面的交换上的用户直接设置21段的IP再加上在IE上设置192.168.21.254及端口3128进行上...
How do C++ class members get initialized if I don't do it explicitly?
...e object's class does not have a default constructor, it will be a compile error if you do not explicitly initialize it.
For primitive types (pointers, ints, etc), they are not initialized -- they contain whatever arbitrary junk happened to be at that memory location previously.
For references (e....
来自微软的一手内幕：Windows 10是怎么出炉的 - 创意 - 清泛网 - 专注C/C++及内核技术
...面采用了大胆的策略，这个策略将公司带进了触摸屏和可连接应用的时代。
但是他们失策了。用户们拒绝使用新版Windows，没有了用户的支持，开发者们也首鼠两端。然而iPad并未碾压笔记本，消费者们对触屏电脑兴趣缺缺。...
Alternative to google finance api [closed]
... get stock data about the company but this API is deprecated since 2011/26/05.
5 Answers
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How to read lines of a file in Ruby
... do
– Irongaze.com
May 23 '13 at 17:05
13
This will read the entire file into memory, which could...
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...ue why. When I try to ssh into my server with user@hostname , I get the error:
14 Answers
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