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Insert, on duplicate update in PostgreSQL?
Several months ago I learned from an answer on Stack Overflow how to perform multiple updates at once in MySQL using the following syntax:
...
Tactics for using PHP in a high-load site
...ne process that writes the non-indexed columns over the indexed columns in batches. This way, you can control better when mySQL will need to recompute the index.
Avoid computed queries like a plague. If you must compute a query, try to do this once at write time.
CACHING
I highly recommend Memc...
Setting the zoom level for a MKMapView
...enter: location.coordinate, latitudinalMeters: CLLocationDistance(exactly: 5000)!, longitudinalMeters: CLLocationDistance(exactly: 5000)!)
mapView.setRegion(mapView.regionThatFits(region), animated: true)
share
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How can I query a value in SQL Server XML column
...lns:ns0="http://Integration">
<MATERIAL>10</MATERIAL>
<BATCH>A1</BATCH>
</ns0:Record>
e.g. Query:
select
Parametrs,TimeEdit
from
[dbo].[Log_XML]
where
Parametrs.value('(//*:Record/BATCH)[1]', 'varchar(max)') like '%A1%'
ORDER BY TimeEdit DESC
...
Using CSS td width absolute, position
...f td's are overflowing.
This for example, i've given the table a width of 5000px, which I thought would fit your requirements.
table{
width:5000px;
}
It is the exact same code you provided, which I merely added in the table width.
I believe what is happening, is because your TD's are way pa...
How to remove a single, specific object from a ConcurrentBag?
...r: you can't do it in an easy way.
The ConcurrentBag keeps a thread local queue for each thread and it only looks at other threads' queues once its own queue becomes empty. If you remove an item and put it back then the next item you remove may be the same item again. There is no guarantee that rep...
Scheduling recurring task in Android
....schedule(myTimerTask, 1000);
}else{
//delay 1000ms, repeat in 5000ms
timer.schedule(myTimerTask, 1000, 1000);
}
btnStart.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
Intent i = new Intent(MainActivit...
How to remove all callbacks from a Handler?
...Handler.postDelayed(myRunnable, x) to post another callback to the message queue at other places in your code, and remove all pending callbacks with myHandler.removeCallbacks(myRunnable)
Unfortunately, you cannot simply "clear" the entire MessageQueue for a Handler, even if you make a request for t...
How to speed up insertion performance in PostgreSQL
... memory a couple of times over, so keep it to a few hundred per statement.
Batch your inserts into explicit transactions, doing hundreds of thousands or millions of inserts per transaction. There's no practical limit AFAIK, but batching will let you recover from an error by marking the start of each...
How to check for an active Internet connection on iOS or macOS?
... Update the UI on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"Yayyy, we have the interwebs!");
});
};
// Internet is not reachable
internetReachableFoo.unreachableBlock = ^(Reachability*reach)
{
// Update the UI on the mai...