大约有 43,100 项符合查询结果（耗时：0.0566秒） [XML]
How to reload apache configuration for a site without restarting apache
...
187
should be possible using the command
sudo /etc/init.d/apache2 reload
hope that helps
...
How do I get a UTC Timestamp in JavaScript?
...
16 Answers
16
Active
...
dplyr: “Error in n(): function should not be called directly”
...
120
I presume you have dplyr and plyr loaded in the same session. dplyr is not plyr. ddply is not ...
How to Delete using INNER JOIN with SQL Server?
...
16 Answers
16
Active
...
CASCADE DELETE just once
...
178
No. To do it just once you would simply write the delete statement for the table you want to ...
Extract a dplyr tbl column as a vector
...
188
With dplyr 0.7.0, you can use pull to get a vector from a tbl.
library("dplyr")
#>
#&g...
How to extract numbers from a string in Python?
...
17 Answers
17
Active
...
Does Python have a ternary conditional operator?
...ession:
>>> pass if False else x = 3
File "<stdin>", line 1
pass if False else x = 3
^
SyntaxError: invalid syntax
You can, however, use conditional expressions to assign a variable like so:
x = a if True else b
Think of the conditional expression as switching betwee...