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How to redirect output to a file and stdout
...gt;&1 | tee outfile
2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also directed to the given output file as of the tee command.
Furthermore, if you want to append to the log file, use tee -a as:
pro...
How do I detect unsigned integer multiply overflow?
I was writing a program in C++ to find all solutions of a b = c , where a , b and c together use all the digits 0-9 exactly once. The program looped over values of a and b , and it ran a digit-counting routine each time on a , b and ab to check if the digits condition was satisfied.
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Peak signal detection in realtime timeseries data
...eshold that makes the algorithm signal when you want it to (some trial-and-error might be needed here to get to a good threshold for your purpose).
WARNING: The code above always loops over all datapoints everytime it runs. When implementing this code, make sure to split the calculation of the sign...
How to get the command line args passed to a running process on unix/linux systems?
On SunOS there is pargs command that prints the command line arguments passed to the running process.
13 Answers
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Comparing boxed Long values 127 and 128
I want to compare two Long objects values using if conditions. When these values are less than 128 , the if condition works properly, but when they are greater than or equal to 128 , comparison fails.
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Event system in Python
...el is basically a bag-of-handlers with more features related to threading, error handling, ...
python-dispatch requires the even source classes to derive from pydispatch.Dispatcher.
buslane is class-based, supports single- or multiple handlers and facilitates extensive type hints.
Pithikos' Observer...
How to create the branch from specific commit in different branch
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GauthierGauthier
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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...
What is the purpose of class methods?
...instantiate the class every time I wanted to output a debugging message or error or warning. But I also wanted to encapsulate the functioning of this logging facility and make it reusable without the declaration of any globals.
So I used class variables and the @classmethod decorator to achieve th...
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...