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炒股是世界难题！历史上那些名人炒股水平 - 轻松一刻 - 清泛网 - 专注C/C++...
...屡遭惨败，少有佳绩。
他曾看好互联网投资，成为软件公司最著名的董事会成员。2000 年，在Divine公司股票公开发行前4个月，乔丹购买了该公司的股票期权。可是，Divine软件公司的股票不仅没有升值，反而大幅下挫。乔丹...
How do you discover model attributes in Rails?
... current_sign_in_at: datetime, last_sign_in_at: datetime,
current_sign_in_ip: string, last_sign_in_ip: string, created_at: datetime,
updated_at: datetime)"
Alternatively, having run rake db:create and rake db:migrate for your development environment, the file db/schema.rb will contain the author...
无人驾驶汽车大难题 人工智能同人的差距显著 - 资讯 - 清泛网 - 专注C/C++...
...中更顺畅地行驶。与此同时，这些数据还被用于不断改善软件，以便所有车辆能够从一辆车的经验中吸取教训。2009年，谷歌自动驾驶汽车就已经以自动驾驶模式行驶了193万公里行程，其软件已经能够轻易地控制变道、超车等系...
What is the strict aliasing rule?
...an example that should not be surprising (live example):
int x = 10;
int *ip = &x;
std::cout << *ip << "\n";
*ip = 12;
std::cout << x << "\n";
We have a int* pointing to memory occupied by an int and this is a valid aliasing. The optimizer must assume that assignments...
Net::SMTPAuthenticationError when sending email from Rails app (on staging environment)
...ethod = :smtp
config.action_mailer.default_url_options = { :host => "my.ip.addr.here" }
config.action_mailer.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:domain => 'my.ip.addr.here:80',
:user_name => "my_email_name@gmail.com",
:password ...
支撑Github的开源技术 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...dis的后台作业控制系统，提供可视化的界面，可以方便的监控后台作业的运行状态和监控情况。
另外，Github还发布了“支撑Github Windows客户端的开源项目”和“支撑Github Mac客户端的开源项目”两个Showcase。
Github 开源技术
How to write a scalable Tcp/Ip based server
...design phase of writing a new Windows Service application that accepts TCP/IP connections for long running connections (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
...
What are the Ruby Gotchas a newbie should be warned about? [closed]
...
Wikipedia Ruby gotchas
From the article:
Names which begin with a capital letter are treated as constants, so local variables should begin with a lowercase letter.
The characters $ and @ do not indicate variable data type as ...
Difference between @import and link in CSS
...
The <link> directive can allow for multiple css be loaded and interpreted asyncronously.
the @import directive forces the browser* to wait until the imported script is loaded inline to the parent script before it can be correctly processed by it's engine, since t...
TCP loopback connection vs Unix Domain Socket performance
... the overhead of TCP (congestion control, flow control, stream management (IP packet ordering, retransmission, etc) ). Unix domain sockets do not do any of the above because it was designed from the ground up to be ran locally, meaning no congestion issues, no speed differences between server/client...