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How to get the number of days of difference between two dates on mysql?
... calculation
In your case, you'd use :
mysql> select datediff('2010-04-15', '2010-04-12');
+--------------------------------------+
| datediff('2010-04-15', '2010-04-12') |
+--------------------------------------+
| 3 |
+------------------------------------...
Unique combination of all elements from two (or more) vectors
...2
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11 DEF 2012-05-04
12 GHI 2012-05-04
13 ABC 2012-05-05
14 DEF 2012-05-05
15 GHI 2012-05-05
If the resulting order isn't what you want, you can sort afterwards. If you name the arguments to expand.grid, they will beco...
How to get Android crash logs?
...is Thompson
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2
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Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...所用到的工具及操作平台罗列如下:
操作平台: gentoo 2004.3 # kernel 2.6.9
逆向工具:
反汇编 -- objdump （这个工具基本上每个LINUX上都有）、lida( http://lida.sourceforge.net/ )
调试器 -- gdb
十六进制编辑器 -- hexedit
文本编...
How to reset or change the MySQL root password?
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step 3 did not work for me with Ubuntu 18.04. I just logged in using sudo mysql
– itsols
Oct 24 '18 at 8:02
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...】
1.打开Visual Studio 2008 命令提示窗口
2.进入D:\05_Computer\04_3rdPatry\02Boost\boost_1_44_0\boost_1_44_0\tools\jam\src
3.执行 build.bat 会在D:\05_Computer\04_3rdPatry\02Boost\boost_1_44_0\boost_1_44_0
\tools\jam\src\bin.ntx86 生成 bjam.exe文件.
4.Copy bjam.exe 文件到 D:...
How to install ia32-libs in Ubuntu 14.04 LTS (Trusty Tahr)
I installed Ubuntu 14.04 (Trusty Tahr) yesterday. Everything seems OK. But when I tried to compile some C code, I encounter the following error. The error seems to be due to the OS lacking the 32-bit architecture support. The error output is as following:
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Renaming files in a folder to sequential numbers
... let, and printf for the padding:
a=1
for i in *.jpg; do
new=$(printf "%04d.jpg" "$a") #04 pad to length of 4
mv -i -- "$i" "$new"
let a=a+1
done
using the -i flag prevents automatically overwriting existing files.
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How to clone a Date object?
...r example using toISOString() on the both dates in Firefox generates "2015-04-21T04:56:42.000Z" and "2015-04-21T04:56:42.337Z".
– crudh
Apr 21 '15 at 4:57
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How to install lxml on Ubuntu
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At least on Ubuntu 14.04 you also have to install the package zlib1g-dev.
– Christian Berendt
Jun 20 '14 at 17:41
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