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What is the ideal data type to use when storing latitude / longitude in a MySQL database?
... 7 16 m 52 ft Houses/Businesses
MEDIUMINT scaled 6 2.7 m 8.8 ft
FLOAT 8 1.7 m 5.6 ft
DECIMAL(8,6)/(9,6) 9 16cm 1/2 ft Friends in a mall
Deg*10000000 (INT) 8 16mm 5/8 in Marbles
DOUBLE 16 3.5nm ...
Using python's eval() vs. ast.literal_eval()?
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i am using python 2.7 and i just checked its working fine on python 3.x. My bad i kept trying it on python 2.7
– Mourya
Sep 23 '16 at 7:18
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How to properly assert that an exception gets raised in pytest?
...================================================
platform linux2 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.6.4
collected 7 items
test.py ..FF..F
=================================================================================================== FAILURES ============================================...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...译。
glibc ptmalloc2
ptmalloc2即是我们当前使用的glibc malloc版本。
ptmalloc原理
系统调用接口
上图是 x86_64 下 Linux 进程的默认地址空间, 对 heap 的操作, 操作系统提供了brk()系统调用，设置了Heap的上边界； 对 mmap 映射区域的操作,...
What is the difference between dict.items() and dict.iteritems() in Python2?
...d is also gone, since items() in Python 3 works like viewitems() in Python 2.7.
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How can I represent an 'Enum' in Python?
....4 as described in PEP 435. It has also been backported to 3.3, 3.2, 3.1, 2.7, 2.6, 2.5, and 2.4 on pypi.
For more advanced Enum techniques try the aenum library (2.7, 3.3+, same author as enum34. Code is not perfectly compatible between py2 and py3, e.g. you'll need __order__ in python 2).
To...
How do I add custom field to Python log format string?
....warning('test')
Traceback (most recent call last):
File "/usr/lib/python2.7/logging/__init__.py", line 846, in emit
msg = self.format(record)
File "/usr/lib/python2.7/logging/__init__.py", line 723, in format
return fmt.format(record)
File "/usr/lib/python2.7/logging/__init__.py", lin...
10 条真心有趣的 Linux 命令 - 创意 - 清泛网 - 专注C/C++及内核技术
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5.asciiquarium
这个命令会将你的终端变成一个海洋馆。
下载term animator：
# wget http://search.cpan.org/CPAN/authors/id/K/KB/KBAUCOM/Term-Animation-2.4.tar.gz
安装并且配置这个包：
# tar -zxvf Term-Animation-2.4.tar.gz
# cd Term-Animation-2.4/
# perl Makefile...
VS2012警告未能加载包“Visual C++ package” - C/C++ - 清泛网 - 专注C/C++及内核技术
...项目的问题，还报各种加载失败。解决方法：到微软官网下载VS2012更新KB2781514，大概1.12MB链接地...安装了windows更新后就出现VS2012无法打开项目的问题，报加载失败如下图：
解决方法：
到微软官网下载VS2012更新 KB2781514，大...
一款IP:端口监控工具 服务器端口监控工具[附源码] - C/C++ - 清泛网 - 专注...
...异常报警（PC蜂鸣器、自定义wav文件）。
软件下载：https://www.tsingfun.com/down/soft/74.html
源码下载：TradeMonitor.zip
主要代码请参考：《mfc telnet 端口，代码实现、不调用telnet.exe》
表格采用GridCtrl（Demo源码）：《MFC Grid ...