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Get ID of last inserted document in a mongoDB w/ Java driver
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It's safe to do
doc.set("_id", new ObjectId())
if you look at driver code
if ( ensureID && id == null ){
id = ObjectId.get();
jo.put( "_id" , id );
}
public static ObjectId get(){
return new ObjectId();
}
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Reading string from input with space character? [duplicate]
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What if the length of the C-string is unknown? If I delete the number 100 in char name[100];, it becomes char name[] and name contains no white space.
– Alston
Nov 14 '13 at 11:42
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Among $_REQUEST, $_GET and $_POST which one is the fastest?
... depends on variables_order ; and not sure you want to work with cookies.
If I had to choose, I would probably not use $_REQUEST, and I would choose $_GET or $_POST -- depending on what my application should do (i.e. one or the other, but not both) : generally speaking :
You should use $_GET when...
Dynamic SELECT TOP @var In SQL Server
...I've heard that it is possible to get incorrect row number with @@RowCount if you have multi-column primary key. Is that true?
– Brian Kim
Oct 6 '08 at 20:40
add a comment
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HQL ERROR: Path expected for join
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What if: you did not make an association in the Entity and just saved something like 'Long userId;'
– Spektakulatius
Jun 11 '18 at 10:28
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Difference between virtual and abstract methods [duplicate]
...omething, and any subclasses CAN override the method using the override modifier and provide a custom implementation.
public abstract class E
{
public abstract void AbstractMethod(int i);
public virtual void VirtualMethod(int i)
{
// Default implementation which can be overridd...
jQuery, simple polling example
... Please beware though that the suggested code will stop polling if a single request fails. In a typical scenario you would probably want to continue polling anyway. I would not have setTimeout within the success handler but instead chain the ajax call with jQuery always. Like this: $...
How to disable back swipe gesture in UINavigationController on iOS 7
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I found a solution:
Objective-C:
if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
Swift 3+:
self.navigationController?.interactive...
How do I see what character set a MySQL database / table / column is?
... As far as I can tell the closest you can get to retrieving column specific character set information in MySQL < 5 is to do SHOW FULL COLUMNS FROM tableName
– Robin Winslow
Jun 7 '11 at 18:03
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Why number 9 in kill -9 command in unix? [closed]
...RTMAX-3 62) SIGRTMAX-2
63) SIGRTMAX-1 64) SIGRTMAX
As for the "significance" of 9... I would say there is probably none. According to The Linux Programming Interface(p 388):
Each signal is defined as a unique (small) integer, starting
sequentially from 1. These integers are defined in ...