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Finding quaternion representing the rotation from one vector to another
...r you can still freely spin the result around it's axis? Do you know what extra information can typically be used to constrain this choice and make the problem well defined?
– Doug McClean
Oct 26 '13 at 2:07
...
Android - Launcher Icon Size
...ractices/screens_support.html. Search on the page for, "180x180 (3.0x) for extra-extra-high-density". However, I've seen 144 a few places.
– 1.21 gigawatts
Jan 25 '15 at 5:13
...
Using Java 8's Optional with Stream::flatMap
...de() {
return optional.hashCode();
}
@Override
public String toString() {
return optional.toString();
}
}
You will see that I added flatStream(), as here:
public Stream<T> flatStream() {
if (!optional.isPresent()) {
return Stream.empty();
}
...
Peak-finding algorithm for Python/SciPy
...ers width, threshold, distance and above all prominence to get a good peak extraction.
According to my tests and the documentation, the concept of prominence is "the useful concept" to keep the good peaks, and discard the noisy peaks.
What is (topographic) prominence? It is "the minimum height nec...
Remove the last character from a string [duplicate]
What is fastest way to remove the last character from a string?
4 Answers
4
...
Download a file with Android, and showing the progress in a ProgressDialog
...fy the UI thread from here
private class DownloadTask extends AsyncTask<String, Integer, String> {
private Context context;
private PowerManager.WakeLock mWakeLock;
public DownloadTask(Context context) {
this.context = context;
}
@Override
protected String do...
C# Events and Thread Safety
...ith every event - aka boilerplate code!
public event Action<thisClass, string> Some;
protected virtual void DoSomeEvent(string someValue)
{
var e = Some; // avoid race condition here!
if(null != e) // avoid null condition here!
e(this, someValue);
}
2 - the race condition issue) ...
Many-to-many relationship with the same model in rails?
...schema for your posts:
create_table "posts", :force => true do |t|
t.string "name", :null => false
end
For any many-to-many relationship, you need a join table. Here's the schema for that:
create_table "post_connections", :force => true, :id => false do |t|
t.integer "post_a_id"...
Array.size() vs Array.length
...
Is there something that does work with Strings if size doesn't work?
– Chris
Apr 17 '17 at 14:42
2
...
How do I directly modify a Google Chrome Extension File? (.CRX)
...w.
2.) The sub folder containing the extension is a random alpha-numeric string named after the extension's ID, which can be found on Chrome's extension page if Developer flag is set to true. (Upper right hand checkbox on the extensions page)
...