大约有 44,800 项符合查询结果(耗时:0.0383秒) [XML]
What are the pros and cons of the SVN plugins for Eclipse, Subclipse and Subversive? [closed]
...
32 Answers
32
Active
...
How to extend an existing JavaScript array with another array, without creating a new array
...
Arsen Khachaturyan
5,90933 gold badges3232 silver badges3434 bronze badges
answered Sep 3 '09 at 15:27
DzinXDzinX
43....
How do I trim a file extension from a String in Java?
...
290
This is the sort of code that we shouldn't be doing ourselves. Use libraries for the mundane s...
How to split last commit into two in Git
...o that now it looks like this:
1
something
something else
something again
2
Now I decide that I want to split it into two, and I want the insertion of the
first line to be in the first commit, and the insertion of the last line to be
in the second commit.
First I go back to HEAD's parent, but I ...
Remove duplicated rows using dplyr
...tion for this purpose.
Original answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_num...
Initializing a member array in constructor initializer
...tly to fire off list initialization
struct A {
int foo[3];
A():foo{1, 2, 3} { }
A():foo({1, 2, 3}) { } /* invalid */
};
share
|
improve this answer
|
follow
...
How do you do a ‘Pause’ with PowerShell 2.0?
...
|
edited Dec 27 '14 at 14:54
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
...
curl POST format for CURLOPT_POSTFIELDS
... |
edited Mar 7 '11 at 20:40
answered Mar 7 '11 at 20:35
...
Google Gson - deserialize list object? (generic type)
...
|
edited Mar 20 '18 at 12:20
Daniel Pryden
52.7k1212 gold badges8787 silver badges128128 bronze badges
...
