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How do I use a PriorityQueue?
... inserts an element if possible, otherwise returning
false. This differs from the Collection.add method, which can fail to
add an element only by throwing an unchecked exception. The offer
method is designed for use when failure is a normal, rather than
exceptional occurrence, for example, i...
Django datetime issues (default=datetime.now())
...
Instead of using datetime.now you should be really using from django.utils.timezone import now
Reference:
Documentation for django.utils.timezone.now
so go for something like this:
from django.utils.timezone import now
created_date = models.DateTimeField(default=now, editab...
Setting direction for UISwipeGestureRecognizer
...nizer).
Filed a bug report (#8276386) to Apple.
[Update] I got an answer from Apple saying that the behavior works as was intended.
So for example in a table view you can swipe left or right in a table view cell to trigger 'delete' (this would have directions of the swipe gesture set to left and ...
How do CDI and EJB compare? interact?
...ations (Glassfish, JBoss AS, Websphere, etc).
EJB3 beans were retrofitted from the old legacy EJB2 component model* and were the first beans in Java EE to be managed beans via an annotation. EJB3 beans feature dependency injection, declarative transactions, declarative security, pooling, concurren...
Python Empty Generator Function
... Python 3.3 and above (as suggested by DSM), this:
def empty():
yield from ()
The presence of the yield keyword makes it clear at the briefest glance that this is just another generator function, exactly like all the others. It takes a bit more time to see that the iter(()) version is doing t...
How can I parse a time string containing milliseconds in it with python?
...roseconds. You may be better off using datetime, like this:
>>> from datetime import datetime
>>> a = datetime.strptime('30/03/09 16:31:32.123', '%d/%m/%y %H:%M:%S.%f')
>>> a.microsecond
123000
...
How to center a Window in Java?
...
From this link
If you are using Java 1.4 or newer,
you can use the simple method
setLocationRelativeTo(null) on the
dialog box, frame, or window to center
it.
...
C++ static virtual members?
...you use the class instead of an object, it would naturally use the version from that class, instead of doing virtual-dispatch. Nothing new there.
– Deduplicator
Feb 2 '15 at 22:17
...
Node.js quick file server (static files over HTTP)
...ng at http://127.0.0.1:8125/');
UPDATE
If you need to access your server from external demand/file, you need to overcome the CORS, in your node.js file by writing the below, as I mentioned in a previous answer here
// Website you wish to allow to connect
response.setHeader('Access-Control-Allow-O...
Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java
... if the execution of the program went good or bad. It's a sort of heredity from older programming languages where it's useful to know if something went wrong and what went wrong.
Exit code is
0 when execution went fine;
1, -1, whatever != 0 when some error occurred, you can use different values f...