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Django FileField with upload_to determined at runtime
...uploads so that if user joe uploads a file it goes to MEDIA_ROOT/joe as opposed to having everyone's files go to MEDIA_ROOT. The problem is I don't know how to define this in the model. Here is how it currently looks:
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Docker can't connect to docker daemon
...
Linux
The Post-installation steps for Linux documentation reveals the following steps:
Create the docker group.
sudo groupadd docker
Add the user to the docker group.
sudo usermod -aG docker $(whoami)
Log out and log back in to ensure...
_csv.Error: field larger than field limit (131072)
... and remove the need for csv.field_size_limit().
– roskakori
Oct 30 '14 at 15:02
thank you so much for this, ive been...
C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...r和标准关联容器－或许这就是优先顺序。
对插入和删除操作，你需要事务语义吗？如果是，只能选择list。因为在标准容器中，只有list对多个元素的插入操作提供了事务语义。
deque是唯一的、迭代器可能会变为无效（插入操作...
How to remove unused C/C++ symbols with GCC and ld?
...ou could omit the unused one with the following command to gcc(g++):
gcc -Os -fdata-sections -ffunction-sections test.cpp -o test -Wl,--gc-sections
(Note that -Os is an additional compiler flag that tells GCC to optimize for size)
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How to copy to clipboard in Vim?
Is it possible to copy to clipboard directly from Vim? yy only copies stuff to Vim's internal buffer. I want to copy to the OS's clipboard. Is there any such command in Vim or you can only yank stuff within Vim?
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优化InnerHTML操作 - 更多技术 - 清泛网 - 专注C/C++及内核技术
优化InnerHTML操作多数现代浏览器都实现了innerHTML操作，它的方便性让我们爱不释手，但如果使用不当，很容易出现效率问题，本文通过一个例子来说明如何优化i...多数现代浏览器都实现了innerHTML操作，它的方便性让我们爱不释...
MVC演化史 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...但它仍然存在硬伤：
首先随着以微软视窗为主的图形化操作系统的兴起，操作系统本身提供了一套原生的View接口，用来截获用户通过鼠标或键盘发出的请求，结果让Controller显得多余了。
其次由于在Application Model MVC中，View的...
MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...
...可以搞定此类问题。它们的安装很简单，可以依照自己的操作系统选择下载rpm或者deb软件包来安装，当然也可以使用源代码来安装，不过要注意的是，必须确保系统已经安装了依赖的Perl软件包：
shell> perl -MCPAN -e 'install DBI'
she...
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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