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Why do we need virtual functions in C++?
... const a( 3.14 );
Number const b( 2.72 );
Number const c( 1.0 );
Sum const sum_ab( &a, &b );
Sum const sum( &sum_ab, &c );
cout << sum.value() << endl;
}
In the line commented as “bad” the Expression::value method is called...
How to change color in circular progress bar?
...
In the res/drawable folder, put this:
progress.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:pivotX="50%"
android:pivotY="50%"
android:fromDegrees="0"
android:toDegrees="360">
<...
How do you create an asynchronous method in C#?
... To support such a paradigm with Tasks, we need a way to retain the Task façade and the ability to refer to an arbitrary asynchronous operation as a Task, but to control the lifetime of that Task according to the rules of the underlying infrastructure that’s providing the asynchrony, and to do so...
Where to place the 'assets' folder in Android Studio?
...
Let Android Studio do it for you.
In Android Studio (1.0 & above), right-click on the folder and navigate to the Assets Folder.
On the next screen just click Finish.
And voila! It will create the assets folder in the main target source set.
...
UTF-8: General? Bin? Unicode?
I'm trying to figure out what collation I should be using for various types of data. 100% of the content I will be storing is user-submitted.
...
How can I decrease the size of Ratingbar?
... XML code for the RatingBar, use scaleX and scaleY to adjust accordingly. "1.0" would be the normal size, and anything in the ".0" will reduce it, also anything greater than "1.0" will increase it.
<RatingBar
android:id="@+id/ratingBar1"
android:layout_width="wrap_content"
android:layout_h...
List comprehension rebinds names even after scope of comprehension. Is this right?
...s scope affecting the surrounding scope.
– Felipe Gonçalves Marques
Sep 28 '18 at 10:25
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show 2 more comments
...
Converting pixels to dp
...loat dp = somePxValue / density;
density equals
.75 on ldpi (120 dpi)
1.0 on mdpi (160 dpi; baseline)
1.5 on hdpi (240 dpi)
2.0 on xhdpi (320 dpi)
3.0 on xxhdpi (480 dpi)
4.0 on xxxhdpi (640 dpi)
Use this online converter to play around with dpi values.
EDIT:
It seems there is no 1:1 rel...
How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
... kernel. Adds some context to your answer.
– Daniel Näslund
Jun 7 '12 at 10:58
2
...
What's the simplest way to print a Java array?
...], [Alice, Bob]]
double Array:
double[] doubleArray = { 7.0, 9.0, 5.0, 1.0, 3.0 };
System.out.println(Arrays.toString(doubleArray));
Output:
[7.0, 9.0, 5.0, 1.0, 3.0 ]
int Array:
int[] intArray = { 7, 9, 5, 1, 3 };
System.out.println(Arrays.toString(intArray));
Output:
[7, ...