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Locking a file in Python
...ultiple Python processes at once. I have found some solutions online, but most fail for my purposes as they are often only Unix based or Windows based.
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How can I get all the request headers in Django?
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Thanks Manoj. Just out of curiosity - could you show me how I could build a dictionary of headers by filtering out all the keys from the request.META variable which begin with a HTTP_ and strip out the leading HTTP_ part. Is this possible through lambda f...
Optimise PostgreSQL for fast testing
I am switching to PostgreSQL from SQLite for a typical Rails application.
2 Answers
2
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为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...
...技术指标】
1.无人驾驶航空飞行器和无人驾驶飞艇
1.1在操作人员自然视距以外，能够可控飞行，并具有下述任一特性的无人驾驶航空飞行器或无人驾驶飞艇（海关商品编号:8802200011、8801009010）：
1.1.1 最大续航时间大于等于30...
How do I copy a string to the clipboard on Windows using Python?
...n32 and ctypes seem to be an overkill for this simple task. Tkinter is a cross-platform GUI framework, which ships with Python by default and has clipboard accessing methods along with other cool stuff.
If all you need is to put some text to system clipboard, this will do it:
from Tkinter import T...
C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
...每次读取都需要修改引用计数，高并发场景下这样的原子操作也会成为性能瓶颈，毕竟原子加对应的 CPU 指令 lock add 也可以看成是微型锁。
Linux 内核中提供了 RCU 方法，笔者目前对此还没有太多的了解。本文主要介绍 Hazard Pointe...
Proper stack and heap usage in C++?
I've been programming for a while but It's been mostly Java and C#. I've never actually had to manage memory on my own. I recently began programming in C++ and I'm a little confused as to when I should store things on the stack and when to store them on the heap.
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How to compile and run C/C++ in a Unix console/Mac terminal?
...e executable just built is the same as running any program - but you will most often need to specify the path to the executable as the shell will only search what is in $PATH to find executables, and most often that does not include the current directory (.).
So to run the built executable foo:
./...
How can you detect the version of a browser?
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just discovered serious issue downgrading broswer IE11 to IE10 navigatior user agent showing Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/6.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; .NET4...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
...原理
用pt-table-sync修复不一致的数据 描述了工具原理
操作过程
只把过程和用到的东西解释了下，有些参数选项等还需要查阅文档。两台机器都是centos6.5 mysql版本都是5.6 , 由于是线上环境，这里ip和密码等敏感信息修改了下。...