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How to combine multiple conditions to subset a data-frame using “OR”?
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254
my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics...
windows版 svn 服务器搭建及总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：http://tortoisesvn.net/downloads.html
我的安装路径为：
2.为svn创建版本存储仓库repository。
可以使用svnadmin 命令，格式是：
svnadmin create d:/svntest
意思是在d盘创建名为svntest仓库。 不清楚的可以用 svnadmin help 查看帮助。
这...
Maximum length for MD5 input/output
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244
MD5 processes an arbitrary-length message into a fixed-length output of 128 bits, typically re...
How to select last two characters of a string
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432
You can pass a negative index to .slice(). That will indicate an offset from the end of the set....
Iterating over dictionaries using 'for' loops
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5552
key is just a variable name.
for key in d:
will simply loop over the keys in the dictionary...
Checking for the correct number of arguments
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218
#!/bin/sh
if [ "$#" -ne 1 ] || ! [ -d "$1" ]; then
echo "Usage: $0 DIRECTORY" >&2
e...
How do I check if a string contains another string in Objective-C?
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23 Answers
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Copying the GNU screen scrollback buffer to a file (extended hardcopy)
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286
To write the entire contents of the scrollback buffer to a file, type
Ctrl + A and :
to get t...
Copy table without copying data
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answered Dec 2 '09 at 17:28
AndomarAndomar
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C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
...ent --> 的节点。
Text，指在<Name>Tom<Name>的粗体部分。
2、在XML中，可以用XmlNode对象来参照各种XML数据类型。
2.1 查询已知绝对路径的节点（集）
objNodeList = objDoc.SelectNodes("Company/Department/Employees/Employee")
或者
objNodeList...