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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/...
...;
校验时候需要在主mysql 中新建一张表，新建用户需要有读写的权限，这里是把校验表建立在radius库中。
pt-table-checksum 校验
校验是在主库服务器上进行的
主库shell中执行 pt-table-checksum h='192.168.1.100',u='checksums',p='slavecheck',P=330...
Remove the last character from a string [duplicate]
...ote that this is a dangerous way to remove the extra comma at the end of a CSV string (a quite common issue when concatenating values in a loop). This would indeed turn A;B;C;D; to A;B;C;D, but will also transform A;B;;; to A;B. Often one wants to preserve the delimiters between empty values, becaus...
Convert string to a variable name
...names = c('jan', 'feb', 'march')
file_names = list_files('path to multiple csv files saved on drive')
assign(varnames[1], read.csv(file_names[1]) # This will assign the variable
From there, if you try to print the variable varnames[1], it returns 'jan'.
To work around this, you need to do
print(...
Convert list of dictionaries to a pandas DataFrame
...written individually.
The following method is useful in that case.
import csv
my file= 'C:\Users\John\Desktop\export_dataframe.csv'
records_to_save = data2 #used as in the thread.
colnames = list[records_to_save[0].keys()]
# remember colnames is a list of all keys. All values are written corr...
Why am I seeing “TypeError: string indices must be integers”?
...ssues into a readable form. Using the advice on How can I convert JSON to CSV? I came up with this:
6 Answers
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Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
...安装
需要最新版的Nginx，LuaJIT，ngx_devel_kit，ngx_lua等安装文件。
安装Lua或者LuaJIT都是可以的，但是出于效率的考虑，推荐安装LuaJIT。
shell> wget http://luajit.org/download/LuaJIT-<VERSION>.tar.gz
shell> tar zxvf LuaJIT-<VERSION>.tar.gz
shell> cd LuaJI...
CentOS+Nginx+PHP+MySQL详细配置(图解) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...//在删除系统自带的PCRE之前，要先备份一下libpcre.so.0这个文件，因为RPM包的关联性太强，在删除后没libpcre.so.0这个文件时我们装PCRE是装不上的
#rpm -e --nodeps pcre-6.6-1.1 //删除系统自带的PCRE
# tar zxvf pcre-8.00.tar.gz
#cd pcre-8.00
...
How do I tell matplotlib that I am done with a plot?
...e, which may look like a memory leak.
– Jouni K. Seppänen
Apr 12 '09 at 20:03
5
You can use plt....
How do I associate a Vagrant project directory with an existing VirtualBox VM?
.../mitchellh/vagrant/issues/1755 for details
– Mads Mobæk
May 23 '13 at 9:13
1
I was looking for ....
ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...行线
2.1.1.3基于freebsd的串行终端
2.1.2将调试文字输出到文件
2.1.3将调试文字输出到屏幕
2.1.4修改波特率（数据传输速率）
2.2KDBG
2.3GDB
2.4WINDBG
3.生成更多输出
3.1编译时开启verbosity功能
3.1.1 reactos类型
3.1.1.1加入我们自己的d...