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Difference between shadowing and overriding in C#?
...en by a sub-class and calls to that method even on the super-class type or from inside code of the super-class will call the replacement implementation from the sub-class.
Then a concrete method is shown (one not marked as virtual or abstract) being hidden by using the new keyword when defining a m...
How to get controls in WPF to fill available space?
...
Each control deriving from Panel implements distinct layout logic performed in Measure() and Arrange():
Measure() determines the size of the panel and each of its children
Arrange() determines the rectangle where each control renders
The last ...
__lt__ instead of __cmp__
...other<self
Now your class can define just __lt__ and multiply inherit from ComparableMixin (after whatever other bases it needs, if any). A class decorator would be quite similar, just inserting similar functions as attributes of the new class it's decorating (the result might be microscopicall...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...es formed by the fingers.
The angles we use are in degrees and they range from -360 to 360 degrees. The sign of the angle indicates the direction of rotation. A positive angle means clockwise rotation, and a negative angle means counter-clockwise rotation.
We use the MotionEvent class in Android A...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...es formed by the fingers.
The angles we use are in degrees and they range from -360 to 360 degrees. The sign of the angle indicates the direction of rotation. A positive angle means clockwise rotation, and a negative angle means counter-clockwise rotation.
We use the MotionEvent class in Android A...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...es formed by the fingers.
The angles we use are in degrees and they range from -360 to 360 degrees. The sign of the angle indicates the direction of rotation. A positive angle means clockwise rotation, and a negative angle means counter-clockwise rotation.
We use the MotionEvent class in Android A...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...es formed by the fingers.
The angles we use are in degrees and they range from -360 to 360 degrees. The sign of the angle indicates the direction of rotation. A positive angle means clockwise rotation, and a negative angle means counter-clockwise rotation.
We use the MotionEvent class in Android A...
What's the purpose of using braces (i.e. {}) for a single-line if or loop?
...; 100 ; ++i)
if (i % 2 == 0)
j++;
i++;
Oh no! Coming from Python, this looks ok, but in fact it isn't, as it's equivalent to:
int j = 0;
for (int i = 0 ; i < 100 ; ++i)
if (i % 2 == 0)
j++;
i++;
Of course, this is a silly mistake, but one that even an experien...
Can you list the keyword arguments a function receives?
...t required, so ignore them.
Then a function to tell what you are missing from your particular dict is:
def missingArgs(func, argdict):
return set(getRequiredArgs(func)).difference(argdict)
Similarly, to check for invalid args, use:
def invalidArgs(func, argdict):
args, varargs, varkw, ...
How to set custom location for local installation of npm package?
...our user account.
In .npmrc:
prefix=${HOME}/npm
Then run this command from the command line:
npm config ls -l
It should give output on both your own local configuration and the global npm configuration, and you should see your local prefix configuration reflected, probably near the top of the...