大约有 46,000 项符合查询结果(耗时:0.0694秒) [XML]
Reading a delimited string into an array in Bash
...
B--rian
4,11777 gold badges2525 silver badges5252 bronze badges
answered Feb 15 '12 at 13:06
kevkev
...
How to handle both a single item and an array for the same property using JSON.net
...
Frederik Struck-Schøning
11.4k77 gold badges5353 silver badges6262 bronze badges
answered Sep 25 '13 at 5:50
Brian RogersBrian...
Rails Root directory path?
..._ROOT is a string.
– Richard
Jun 9 '11 at 9:54
1
Only Rails.root in 3.1 and later (ahh.. the case...
How do you get centered content using Twitter Bootstrap?
... |
edited May 23 '17 at 11:55
Community♦
111 silver badge
answered Feb 7 '12 at 21:43
...
is guava-libraries available in maven repo?
... community wiki
21 revs, 11 users 72%Etienne Neveu
3
...
How to execute an external program from within Node.js?
...
answered Apr 25 '11 at 4:16
Mark KahnMark Kahn
76.9k2525 gold badges153153 silver badges209209 bronze badges
...
Load dimension value from res/values/dimension.xml from source code
...ns/55972518/…
– Alex
May 4 '19 at 11:28
@Trilarion They do not simply convert to pixels, though. They are saying tha...
rails simple_form - hidden field - create?
...
|
edited Sep 4 '11 at 23:27
answered Mar 20 '11 at 21:07
...
JavaScript chop/slice/trim off last character in string
... Jon EricksonJon Erickson
98.1k3636 gold badges131131 silver badges169169 bronze badges
25
...
Drop data frame columns by name
...st of names :
DF <- data.frame(
x=1:10,
y=10:1,
z=rep(5,10),
a=11:20
)
drops <- c("x","z")
DF[ , !(names(DF) %in% drops)]
Or, alternatively, you can make a list of those to keep and refer to them by name :
keeps <- c("y", "a")
DF[keeps]
EDIT :
For those still not acquainted wi...
