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Git mergetool with Meld on Windows
...n Linux, my favorite merge tool is Meld, and I've had no problems using or configuring it to work with Git. However, in Windows it has been a different story.
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What's the fastest way to merge/join data.frames in R?
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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...命令清除旧规则：
iptables -F
(or iptables --flush)
2.设置chain策略
对于filter table，默认的chain策略为ACCEPT，我们可以通过以下命令修改chain的策略：
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP
以上命令配置将接收...
Reorder levels of a factor without changing order of values
I have data frame with some numerical variables and some categorical factor variables. The order of levels for those factors is not the way I want them to be.
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When should you use a class vs a struct in C++?
In what scenarios is it better to use a struct vs a class in C++?
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Read file line by line using ifstream in C++
The contents of file.txt are:
8 Answers
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Error installing mysql2: Failed to build gem native extension
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Why is it common to put CSRF prevention tokens in cookies?
I'm trying to understand the whole issue with CSRF and appropriate ways to prevent it. (Resources I've read, understand, and agree with: OWASP CSRF Prevention CHeat Sheet , Questions about CSRF .)
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提升大数据分析思想，拥抱大数据未来 - 资讯 - 清泛网 - 专注C/C++及内核技术
...人甚至认为，科技很快就能让大数据分析变得“像使用Excel一样容易”。在其他如潮水般涌起的革命性数据科学当中，最令人感到兴奋的莫过于能够实时掌握消费者和物联网的动态，但是，这恐怕容易使得企业陷于另一种困境。
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Checking if a folder exists using a .bat file [closed]
I would like to be able to check if a certain folder (FolderA) exists and if so, for a message to be displayed and then the batch file to be exited.
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