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Are Java static initializers thread safe?
...ly necessary. However, the class is accessible to anything that the static intiailiser calls (including causing other static initialisers to be invoked).
A class can be loaded by a class loaded but not necessarily initialised straight away. Of course, a class can be loaded by multiples instances of...
How to Generate unique file names in C#
... then the GUID, as suggested by many will do. However, I find that looking into a directory with 1000 GUID file names is very daunting to sort through. So I usually use a combination of a static string which gives the file name some context information, a timestamp, and GUID.
For example:
public s...
What exactly does += do in python?
... implements the __iadd__ special method. You initialize the object with an int, then can use the += operator to add a number. I've added a print statement in __iadd__ to show that it gets called. Also, __iadd__ is expected to return an object, so I returned the addition of itself plus the other nu...
Further understanding setRetainInstance(true)
...not found.");
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.add(new TestFragment(), "test_fragment").commit();
}
else
{
Log.d(TAG, this + ": Existing fragment found.");
}
}
@Override
public void o...
Apply function to all elements of collection through LINQ [duplicate]
...ion method on any reference type, which does the obvious thing.)
It'll be interesting to see if this is part of .NET 4.0. It goes against the functional style of LINQ, but there's no doubt that a lot of people find it useful.
Once you've got that, you can write things like:
people.Where(person =&...
How to make a valid Windows filename from an arbitrary string?
... string is so small that caring about performance of string.Replace() is pointless.
– Serge Wautier
Mar 14 '11 at 8:20
1
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Distributed sequence number generation?
...easy way of doing this in a distributed, high-scale manner. You could look into things like network broadcasts, windowed ranges for each worker, and distributed hash tables for unique worker IDs, but it's a lot of work.
Unique IDs are another matter, there are several good ways of generating unique...
Making heatmap from pandas DataFrame
...
There's some interesting discussion here about pcolor vs. imshow.
– LondonRob
Jul 28 '15 at 9:18
1
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NullPointerException in Java with no StackTrace
I've had instances of our Java code catch a NullPointerException , but when I try to log the StackTrace (which basically ends up calling Throwable.printStackTrace() ), all I get is:
...
How to call an async method from a getter or setter?
...
In point 2. imho you do not take into account the regular scenario where setting the property should again initialize the underlying data (not only in the constructor). Is there any other way besides using Nito AsyncEx or using Di...