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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...alizeAngle((float) Math.atan2(v2y, v2x),v2x,v2y);
Log.i("Rotate", String.format("Vector1 (%f,%f) Vector2 (%f,%f)", v1x,v1y,v2x,v2y));
float angle = (float)Math.toDegrees(angle1-angle2);
return angle;
}
private float normalizeAngle(float angle,float x, float y){
...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...alizeAngle((float) Math.atan2(v2y, v2x),v2x,v2y);
Log.i("Rotate", String.format("Vector1 (%f,%f) Vector2 (%f,%f)", v1x,v1y,v2x,v2y));
float angle = (float)Math.toDegrees(angle1-angle2);
return angle;
}
private float normalizeAngle(float angle,float x, float y){
...
How to use Single TextWatcher for multiple EditTexts?
... int i2) {}
public void afterTextChanged(Editable editable) {
String text = editable.toString();
switch(view.getId()){
case R.id.name:
model.setName(text);
break;
case R.id.email:
model.setEmail(text);
...
Catching “Maximum request length exceeded”
...s ago, but I still want to ask whether this worked fine till now? does the string comparison of 'GetEntireRawContent' work fine? I don't think this is a timeout issue. is there anyone standing out for pointing me to uncloudy somewhere regarding this?
– Elaine
M...
JavaScript OR (||) variable assignment explanation
...se when used in boolean context, and they are 0, null, undefined, an empty string, NaN and of course false.
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How can I exclude all “permission denied” messages from “find”?
...e redirecting ALL errors to dev/null 2) You're filtering an explicit error string!! Depending on these is famously brittle and what if your file was in a directory named 'permission denied'? Oops!
– Gunchars
Nov 10 '14 at 6:03
...
Remove redundant paths from $PATH variable
... your command sets the PATH to - $PATH(the current value of PATH) + the string /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games. If you want to have just the String, remove $PATH + the semicolon (:) from your command. It doesn't matter if you use echo or edit the file...
Can we instantiate an abstract class?
...
}
}
Poly.java:
class Poly extends My {
public static void main(String a[]) {
My m = new My() {};
m.myMethod();
}
}
Now, compile both your source files:
javac My.java Poly.java
Now in the directory where you compiled the source code, you will see the following cla...
XSLT equivalent for JSON [closed]
...
This code uses string.eval() ... :-(
– dreftymac
Oct 17 '12 at 1:10
...
Set Page title using UI-Router
... $window.document.title = title;
}
});
Then just add a title string to your state:
$stateProvider.state({
name: "foo",
url: "/foo",
template: "<foo-widget layout='row'/>",
title: "Foo Page""
});
That will make the words "Foo Page" show up in the title. (If a st...