大约有 32,000 项符合查询结果（耗时：0.0521秒） [XML]
In CSS what is the difference between “.” and “#” when declaring a set of styles?
... the single element declared with an attribute id="foo"
.foo {} will style all elements with an attribute class="foo" (you can have multiple classes assigned to an element too, just separate them with spaces, e.g. class="foo bar")
Typical uses
Generally speaking, you use # for styling something y...
Unique constraint that allows empty values in MySQL
...reference (version 5.5).
A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all engines, a UNIQUE index allows multiple NULL values for columns that can contain NU...
What does int argc, char *argv[] mean?
... argv. This will (in practice) be 1 plus the number of arguments, as virtually all implementations will prepend the name of the program to the array.
The variables are named argc (argument count) and argv (argument vector) by convention, but they can be given any valid identifier: int main(int num...
How to open the default webbrowser using java
... but the program the user has linked it with.... This is not a solution at all!
– thesaint
May 7 '15 at 20:12
4
...
How do I “undo” a --single-branch clone?
...
You can tell Git to pull all branches like this:
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
git fetch origin
If you look in .git/config, it'll look something like this:
[core]
repositoryformatversion = 0
filemode...
How to stop a goroutine
I have a goroutine that calls a method, and passes returned value on a channel:
6 Answers
...
Best documentation for Boost:asio?
...e already -- and I share your concern. To address your question:
There really is very scarce documentation about Boost.Asio aside from the introduction and tutorial. I am not the author, but this is mostly because there are just too many things to document for something as low-level as an Asynchro...
How to tell which commit a tag points to in Git?
...nfig if you use it a lot:
[alias]
tagcommit = rev-list -n 1
And then call it with:
$ git tagcommit $TAG
share
|
improve this answer
|
follow
|
...
Notification passes old Intent Extras
...gIntent contentIntent = PendingIntent.getActivity(context, UNIQUE_INT_PER_CALL, notificationIntent, 0);
intents are not created if you send the same params. They are reused.
share
|
improve this a...
How can I verify a Google authentication API access token?
...oken=XYZ123
Response will be as
{
// These six fields are included in all Google ID Tokens.
"iss": "https://accounts.google.com",
"sub": "110169484474386276334",
"azp": "1008719970978-hb24n2dstb40o45d4feuo2ukqmcc6381.apps.googleusercontent.com",
"aud": "1008719970978-hb24n2dstb40o45d4feuo2u...