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What exactly does += do in python?
I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python.
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Is it possible to change a UIButtons background color?
...ibility:
Create a UIButton in Interface builder.
Give it a type 'Custom'
Now, in IB it is possible to change the background color
However, the button is square, and that is not what we want. Create an IBOutlet with a reference to this button and add the following to the viewDidLoad method:
[but...
Finding the handle to a WPF window
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IntPtr windowHandle = new WindowInteropHelper(myWindow).Handle;
Right now, you're asking for the Application's main window, of which there will always be one. You can use this same technique on any Window, however, provided it is a System.Windows.Window derived Window class.
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Is there a Java standard “both null or equal” static method?
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With Java 7 you can now directly do a null safe equals:
Objects.equals(x, y)
(The Jakarta Commons library ObjectUtils.equals() has become obsolete with Java 7)
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java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
...rence of the FragmentActivity solved the problem. My code looks as follows now:
public class MyFragmentActivity extends FragmentActivity implements OnFriendAddedListener {
private static WeakReference<MyFragmentActivity> wrActivity = null;
@Override
public void onCreate(Bundle s...
What is the iPad user agent?
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This answer is incorrect. From iOS 13 there is now no mention of iPad at all.
– CpnCrunch
Dec 16 '19 at 18:51
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Are Stored Procedures more efficient, in general, than inline statements on modern RDBMS's? [duplica
...optimizers have limits and cut-offs for performance reasons). It is not unknown for very complicated SQL to have distinct, measurable (I've seen a complicated query take 10+ seconds just to generate a plan, before we tweaked the DBMS) latencies due to the optimizer trying to figure out the "near bes...
How do you Force Garbage Collection from the Shell?
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Hello from the mysterious future of 2014. jcmd is now the right tool for the job.
– noahlz
Sep 16 '14 at 14:12
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Why are floating point numbers inaccurate?
...ly in decimal; for more detail, see: 675539944105574 / 4503599627370496.)
Now that we've transformed the third component into a fractional number, adding 1 gives the true mantissa.
Recapping the Components
Sign (first component): 0 for positive, 1 for negative
Exponent (middle component): Subtra...
Rails: call another controller action from a controller
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I know I should not do that, but this is not part of my application it's just for testing and evaluating my application.
– ddayan
Apr 24 '11 at 22:37
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