大约有 44,592 项符合查询结果（耗时：0.0322秒） [XML]
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
...务器，若想再次进入服务器需要重新输入用户名和密码
2．关机或重新启动的命令
shutdown
用来对系统做关机或重启操作，详细的命令参数请输入：shutdown -h 进行查看
shutdown now 关机命令
shutdown -r now 关机重启命令
3. 重...
Easy way to list node modules I have npm linked?
...symlinks, you could try something like find / -type d -name "node_modules" 2>/dev/null | xargs -I{} find {} -type l -maxdepth 1 | xargs ls -l.
share
|
improve this answer
|
...
How can I remove a specific item from an array?
...
1
2
3
4
Next
12484
...
How to reverse a singly linked list using only two pointers?
...
1
2
Next
133
...
Sort a list by multiple attributes?
...
824
A key can be a function that returns a tuple:
s = sorted(s, key = lambda x: (x[1], x[2]))
Or...
Why does the indexing start with zero in 'C'?
...be denoted as array[0].
For more info:
http://developeronline.blogspot.com/2008/04/why-array-index-should-start-from-0.html
share
|
improve this answer
|
follow
...
How can I get a list of locally installed Python modules?
...
624
+100
Solutio...
How to get subarray from array?
I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex) , that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4] .
...
How to open multiple pull requests on GitHub
...
|
edited Oct 27 '19 at 13:17
ahmednabil88
11.8k99 gold badges3939 silver badges7878 bronze badges
...
Pass a data.frame column name to a function
...
You can just use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 <- function(x, column){
max(x[,column])
}
fun1(df, "B")
fun1(df, c("B","A"))
There's no need to use substitute, eval, etc.
You can even pass the desired function as a parameter:
fun1 <- function...