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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...@mit.edu)
Hal Abelson (hal@mit.edu)
Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology
77 Massachusetts Avenue, Cambridge, MA 02139, USA
ABSTRACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novice...
Get size of folder or file
...using the listFiles() method of a file object that represents a directory) and accumulate the directory size for yourself:
public static long folderSize(File directory) {
long length = 0;
for (File file : directory.listFiles()) {
if (file.isFile())
length += file.length(...
Delete multiple remote branches in git
...ully, they all have the same prefix. Using that prefix, is there a git command or cool little shell script I can use that will delete all of those at once?
...
Modular multiplicative inverse function in Python
Does some standard Python module contain a function to compute modular multiplicative inverse of a number, i.e. a number y = invmod(x, p) such that x*y == 1 (mod p) ? Google doesn't seem to give any good hints on this.
...
How to get the function name from within that function?
...str(0, ret.indexOf('('));
return ret;
}
Using Function.caller is non-standard. Function.caller and arguments.callee are both forbidden in strict mode.
Edit: nus's regex based answer below achieves the same thing, but has better performance!
In ES6, you can just use myFunction.name.
Note: Bewa...
Why is Java's AbstractList's removeRange() method protected?
Does anyone have any idea, why removeRange method in AbstractList (and also in ArrayList ) is protected ? It looks like a quite well-defined and useful operation, but still, to use it, we're forced to subclass the List implementation.
...
Global variables in Java
... public static int a;
public static int b;
}
now you can access a and b from anywhere
by calling
Example.a;
Example.b;
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Android Split string
I have a string called CurrentString and is in the form of something like this
"Fruit: they taste good" . I would like to split up the CurrentString using the : as the delimiter. So that way the word "Fruit" will be split into its own string and "they taste good" will be another strin...
Named colors in matplotlib
...
I constantly forget the names of the colors I want to use and keep coming back to this question =)
The previous answers are great, but I find it a bit difficult to get an overview of the available colors from the posted image. I prefer the colors to be grouped with similar colors, ...
How to set the maximum memory usage for JVM?
...y> -Xmx<memory>. Use M or G after the numbers for indicating Megs and Gigs of bytes respectively. -Xms indicates the minimum and -Xmx the maximum.
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