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Is cout synchronized/thread-safe?
...Of particular interest here is the fact that cout is buffered. Even if the calls to write (or whatever it is that accomplishes that effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shared by the different threads. This will quickly lead to corrup...
How do I kill background processes / jobs when my shell script exits?
... trap will be run in case of SIGINT and SIGTERM, too, so the trap would be called twice in case of such a signal.
– jarno
Jul 3 at 8:43
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Entity Framework: There is already an open DataReader associated with this Command
...reader is executed). You can also try to cast the query to ObjectQuery and call ToTraceString to see the SQL command. It is hard to track. I always turn on MARS.
– Ladislav Mrnka
Feb 1 '11 at 22:27
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How do you load custom UITableViewCells from Xib files?
...View.dequeueReusableCell(withIdentifier:for:) has the new behavior, if you call the other one (without indexPath:) you get the old behavior, in which you need to check for nil and instance it yourself, notice the UITableViewCell? return value.
if let cell = tableView.dequeueReusableCell(withIdenti...
Difference between document.addEventListener and window.addEventListener?
...mple, the "DOMContentLoaded" event is only on the document object.
So basically, you need to know which object receives the event you are interested in and use .addEventListener() on that particular object.
Here's an interesting chart that shows which types of objects create which types of events:...
In what order are Panels the most efficient in terms of render time and performance?
...performance of all the panels for the arrange pass since each item is statically assigned a location. The measure pass also has excellent performance since there is no concept of stretching in this panel; each child simply uses its native size.
DockPanel
Defines an area within which you can ar...
Does Redis persist data?
...
I suggest you read about this on http://redis.io/topics/persistence . Basically you lose the guaranteed persistence when you increase performance by using only in-memory storing. Imagine a scenario where you INSERT into memory, but before it gets persisted to disk lose power. There will be data los...
Index (zero based) must be greater than or equal to zero
...o happen when trying to throw an ArgumentException where you inadvertently call the ArgumentException constructor overload
public static void Dostuff(Foo bar)
{
// this works
throw new ArgumentException(String.Format("Could not find {0}", bar.SomeStringProperty));
//this gives the error
...
What is a git topic branch?
...
Topic branches are typically lightweight branches that you create locally and that have a name that is meaningful for you. They are where you might do work for a bug fix or feature (they're also called feature branches) that is expected to take som...
How does Django's Meta class work?
... among the class instances (hence the name Meta for 'metadata' but you can call it anything you like). While in Django it's generally read-only configuration stuff, there is nothing to stop you changing it:
In [1]: class Foo(object):
...: class Meta:
...: metaVal = 1
...: ...