大约有 44,000 项符合查询结果（耗时：0.0657秒） [XML]
RRSet of type CNAME with DNS name foo.com. is not permitted at apex in zone bar.com
...
As per RFC1912 section 2.4:
A CNAME record is not allowed to coexist with any other data. In
other words, if suzy.podunk.xx is an alias for sue.podunk.xx, you
can't also have an MX record for suzy.podunk.edu, or an A record, or
e...
Group by multiple columns in dplyr, using string vector input
...ike so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the columns we want to average within
columns = names(data)[-3]
library(dplyr)
df1 <- data...
How to center a WPF app on screen?
...
146
Put this in your window constructor
WindowStartupLocation = System.Windows.WindowStartupLocat...
How to find out which view is focused?
...
113
Call getCurrentFocus() on the Activity.
...
Named Branches vs Multiple Repositories
...
129
The biggest difference is how the branch names are recorded in the history. With named branche...
How should I handle “No internet connection” with Retrofit on Android
...
answered Mar 23 '14 at 19:22
AlexVAlexV
3,43255 gold badges2727 silver badges3131 bronze badges
...
Ignore Xcode warnings when using Cocoapods
...
|
edited Sep 19 '15 at 4:55
King-Wizard
14.8k44 gold badges7676 silver badges7474 bronze badges
...
Run Cron job every N minutes plus offset
...-59/20 * * * *
Explanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * *...
How do I compile and run a program in Java on my Mac?
...
190
Compiling and running a Java application on Mac OSX, or any major operating system, is very ea...
How to name and retrieve a stash by name in git?
...
21 Answers
21
Active
...