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Drop unused factor levels in a subsetted data frame
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Also: this method does preserve the ordering of the variable.
– webelo
Jul 1 '16 at 0:36
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show 1 mor...
How to get a specific output iterating a hash in Ruby?
...ash.each do |key, array|
puts "#{key}-----"
puts array
end
Regarding order I should add, that in 1.8 the items will be iterated in random order (well, actually in an order defined by Fixnum's hashing function), while in 1.9 it will be iterated in the order of the literal.
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Why should I use core.autocrlf=true in Git?
...nately, there are many binary files that are not DLLs in my repository: in order to be certain I'd got the correct list of file extensions to add to .gitattributes would require reviewing tens of thousands of files.
– Rich
Jul 31 at 21:34
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Why Would I Ever Need to Use C# Nested Classes [duplicate]
...this ...
class A
{
//B is used to help implement A
class B
{
...etc...
}
...etc...
}
... you can always move the inner/nested class to global scope, like this ...
class A
{
...etc...
}
//B is used to help implement A
class B
{
...etc...
}
However, when B is only used to help...
Where is the Java SDK folder in my computer? Ubuntu 12.04
... steps to get Java directory
Step 1:
$ whereis java
java: /usr/bin/java /etc/java /usr/share/java
That tells the command java resides in /usr/bin/java.
Dig again:
Step 2:
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2009-01-15 18:34 /usr/bin/java -> /etc/alternatives/java
So, now we k...
How to export all data from table to an insertable sql format?
...me
, u.ColumnValue
FROM
(SELECT
ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS rn,
'
+ CHAR(13) + @ColumnsCast
+ CHAR(13) + 'FROM [' + @SchemaName + '].[' + @TableName + '] s'
+ CHAR(13) + 'WHERE 1 = 1'
+ CHAR(13) + COALESCE(@WhereClause,'')
+ CHAR(13) ...
What is “android:allowBackup”?
...you to copy your persistent application data to remote "cloud" storage, in order to provide a restore point for the application data and settings. If a user performs a factory reset or converts to a new Android-powered device, the system automatically restores your backup data when the application i...
linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... -q squid
2.Squid代理服务的基本配置
2.1 Squid主配置文件是/etc/squid/squid.conf ，最基本的设置如下。
http_port 192.168.16.1:8080
cache_mem 64 MB
cache_dir ufs /var/spool/squid 4096 16 256
cache_effective_user squid
cache_effective_group squid
dns_nameserver...
(Mac) -bash: __git_ps1: command not found
...oth git-prompt.sh and git-completion.bash are found in `brew --prefix git`/etc/bash_completion.d/.
– dokkaebi
Feb 10 '14 at 22:02
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List OrderBy Alphabetical Order
...(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optional
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