大约有 40,000 项符合查询结果（耗时：0.0692秒） [XML]
Easy way to print Perl array? (with a little formatting)
...
Or, if you want to be really dirty: {local $,=', ';print @array}.
– musiKk
Apr 21 '11 at 7:57
10
...
Summarizing multiple columns with dplyr? [duplicate]
...
The dplyr package contains summarise_all for this aim:
library(dplyr)
df %>% group_by(grp) %>% summarise_all(list(mean))
#> # A tibble: 3 x 5
#> grp a b c d
#> <int> <dbl> <dbl> <dbl> <dbl>
#>...
How to search in array of object in mongodb
...
Use $elemMatch to find the array of particular object
db.users.findOne({"_id": id},{awards: {$elemMatch: {award:'Turing Award', year:1977}}})
share
|
improve this answer
|
...
IntelliJ not recognizing a particular file correctly, instead its stuck as a text file
...
This worked for me, must have somehow accidentally added my filename.
– Harrison
Oct 7 '15 at 18:22
...
Why does cURL return error “(23) Failed writing body”?
...
No. It might help with small documents but when it is too large to fit in the buffer cat uses the error will reappear.You could use -s to silence all error messages (and progress) if you don't need them.
– Kaworu
...
Multiline TextView in Android?
...
If the text you're putting in the TextView is short, it will not automatically expand to four lines. If you want the TextView to always have four lines regardless of the length of the text in it, set the android:lines attribute:
<TextView
android:id="@+id/address1"
android:gravity="left...
IPC performance: Named Pipe vs Socket
...peed testing, you should try socat, which is a very versatile program that allows you to create almost any kind of tunnel.
share
|
improve this answer
|
follow
...
Check if a string contains a number
...it exists in the string, otherwise False.
Demo:
>>> king = 'I shall have 3 cakes'
>>> num_there(king)
True
>>> servant = 'I do not have any cakes'
>>> num_there(servant)
False
share
...
Check if SQL Connection is Open or Closed
... as an enum and not turn it into a string.....
– marc_s
Aug 4 '11 at 15:19
4
Should've added usin...
How do I programmatically click a link with javascript?
...
Actually, so far it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera.
– arik
Jan 29 '12 at 17:17
...