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How to write to an existing excel file without overwriting data (using pandas)?
...
144
Pandas docs says it uses openpyxl for xlsx files. Quick look through the code in ExcelWriter gi...
常用Linux命令详解（持续更新） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的命令
reboot
用来重新启动系统，直接输入reboot即可
4. 新建用户的命令
useradd kedacom 新增一个kedacom的用户
passwd kedacom 为新增的用户设置登陆密码或为已存在用户修改密码
5. 删除用户的命令
userdel -r kedacom 删除用户
...
Virtualbox “port forward” from Guest to Host [closed]
... check it with ping:
# ping 192.168.5.1
PING 192.168.5.1 (192.168.5.1) 56(84) bytes of data.
64 bytes from 192.168.5.1: icmp_seq=1 ttl=128 time=2.30 ms
...
Firewall issues?
@Stranger suggested that in some cases it would be necessary to open used port (8000 or whichever is used) in firewall like th...
When to use MyISAM and InnoDB? [duplicate]
...updates
No transactional integrity (ACID compliance)
No rollback abilities
4,284,867,296 row limit (2^32) -- This is old default. The configurable limit (for many versions) has been 2**56 bytes.
Maximum of 64 indexes per table
InnoDB Limitations:
No full text indexing (Below-5.6 mysql version)
...
Find all records which have a count of an association greater than zero
...s an example
[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, 5, 13, 22, 16, 6, 53]
[11] pry(main)> _.size
=> 17
[12] pry(main)> Article.joins(:comments).size
=> 45
[13] pry(main)> Article.joins(:comments).distinct.size
=> 17
[1...
How to create a zip archive with PowerShell?
...utput file]
– joshschreuder
Jul 6 '14 at 22:59
9
Powershell 5 comes with a Compress-Archive cmdle...
Bulk Insertion in Laravel using eloquent ORM
....
For example:
$data = array(
array('name'=>'Coder 1', 'rep'=>'4096'),
array('name'=>'Coder 2', 'rep'=>'2048'),
//...
);
Coder::insert($data);
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nginx - client_max_body_size has no effect
...
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edited May 9 '14 at 17:09
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How to use JNDI DataSource provided by Tomcat in Spring?
... 8 JNDI Datasource HOW-TO
Tomcat 8 Context Resource Links Reference
Spring 4 JEE JNDI Lookup XML Schema Reference
Spring 4 JndiObjectFactoryBean Javadoc
Edit: This answer has been updated for Tomcat 8 and Spring 4. There have been a few property name changes for Tomcat's default datasource resour...
Is there a way to ignore header lines in a UNIX sort?
... BobSBobS
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