大约有 45,000 项符合查询结果（耗时：0.0691秒） [XML]
How to create a new database using SQLAlchemy?
...
On postgres, three databases are normally present by default. If you are able to connect as a superuser (eg, the postgres role), then you can connect to the postgres or template1 databases. The default pg_hba.conf permits only the unix user named postgres to u...
Variable declared in for-loop is local variable?
...
The reason you are not allowed to define a variable with the same name in both the for-loop as well as outside the for-loop is because variables in the outer-scope are valid in the inner-scope. Meaning that there would be two 'i' variables within t...
Returning value from Thread
...// value[0] holds 2 at this point.
}
You can also use an Executor and a Callable like this:
public void test() throws InterruptedException, ExecutionException
{
ExecutorService executor = Executors.newSingleThreadExecutor();
Callable<Integer> callable = new Callable<Integer>...
Only detect click event on pseudo-element
...
This is not possible; pseudo-elements are not part of the DOM at all so you can't bind any events directly to them, you can only bind to their parent elements.
If you must have a click handler on the red region only, you have to make a child element, like a span, place it right after the ...
How to handle the modal closing event in Twitter Bootstrap?
...l: This event is fired immediately when the hide instance method has been called.
hidden.bs.modal: This event is fired when the modal has finished being hidden from the user (will wait for CSS transitions to complete).
And provide an example on how to use them:
$('#myModal').on('hidden.bs.modal...
Should I use @EJB or @Inject
...se see comments for details.
I switched from @Inject to @EJB because @EJB allows circular injection whereas @Inject pukes on it.
Details: I needed @PostConstruct to call an @Asynchronous method but it would do so synchronously. The only way to make the asynchronous call was to have the original ca...
Good reasons NOT to use a relational database?
...l system)
Very good support for versioning of data
Berkeley DB (Basically, a disk based hashtable)
Very simple conceptually (just un-typed key/value)
Quite fast
No administration overhead
Supports transactions I believe
Amazon's Simple DB
Much like Berkeley DB I believe, but hosted
...
Find a commit on GitHub given the commit hash
...ve the repository checked out, from the command line, you can achieve basically the same thing with either of these commands (unique prefixes work here too):
git show 35e32b6a00dec02ae7d7c45c6b7106779a124685
git log -p -1 35e32b6a00dec02ae7d7c45c6b7106779a124685
Note: If you shorten the commit ha...
Windows batch: sleep [duplicate]
...an into a funny issue using this method when I needed a script to automatically release the computer's IP address, wait a few minutes while I reconfigured a switch port, and then renew the IP address. During the intervening moments that the switch port was down, the network connection was lost and ...
C++ blogs that you regularly follow? [closed]
What are all the C++ blogs that you follow?
51 Answers
51
...