大约有 35,517 项符合查询结果（耗时：0.0421秒） [XML]
git undo all uncommitted or unsaved changes
...
1704
This will unstage all files you might have staged with git add:
git reset
This will revert a...
How to sum a variable by group
...
404
Using aggregate:
aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1...
How to invoke a Linux shell command from Java
...
|
edited Sep 11 '09 at 15:45
answered Sep 11 '09 at 13:12
...
Google Authenticator implementation in Python
...st()
o = ord(h[19]) & 15
h = (struct.unpack(">I", h[o:o+4])[0] & 0x7fffffff) % 1000000
return h
def get_totp_token(secret):
return get_hotp_token(secret, intervals_no=int(time.time())//30)
It has two functions:
get_hotp_token() generates one-time token (that should in...
How can I sharpen an image in OpenCV?
...f frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv::Size(0, 0), 3);
cv::addWeighted(frame, 1.5, image, -0.5, 0, image);
The parameters there are something you need to adjust for yourself.
There's also Laplacian sharpening, you should find something on that when you google.
...
Rename an environment with virtualenvwrapper
...
210
You can use:
cpvirtualenv oldenv newenv
rmvirtualenv oldenv
So in your case:
cpvirtualenv do...
css rotate a pseudo :after or :before content:“”
...
370
Inline elements can't be transformed, and pseudo elements are inline by default, so you must app...
How to find largest objects in a SQL Server database?
...ages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
(sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,
(sum(a.data_pages) * 8) / 1024 as DataSpaceMB
FROM
sys.tables t
INNER JOIN
sys.indexes i ON t.object_id = i.object_id
INNER JOIN
...
Ternary Operator Similar To ?:
...Hi".getClass.getSimpleName |> {x => x.endsWith("$") ? x.init | x}
res0: String = String
scala> List.getClass.getSimpleName |> {x => x.endsWith("$") ? x.init | x}
res1: String = List
Is this adequate for your needs?
...
Guaranteed lifetime of temporary in C++?
...
110
The destructor for that sort of temporaries is called at the end of the full-expression. That's ...