大约有 40,000 项符合查询结果（耗时：0.0650秒） [XML]
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
...
Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
...57
or
byte b = 100;
b /= 2.5;
System.out.println(b); // prints 40
or
char ch = '0';
ch *= 1.1;
System.out.println(ch); // prints '4'
or
char ch = 'A';
ch *= 1.5;
System.out.println(ch); // prints 'a'
share
...
Flatten an Array of Arrays in Swift
...hmiBozdag's answer,
1. Methods in public extensions are public.
2. Removed extra method, as start index will be always zero.
3. I did not find a way to put compactMap inside for nil and optionals because inside method T is always [Any?], any suggestions are welcomed.
let array = [[[1, 2, 3], 4], 5...
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) ...
Comparing two java.util.Dates to see if they are in the same day
...= new LocalDate( dt2.withZone( zone ) );
return ld1.equals( ld2 );
}
String Representation
Another approach is to create a string representation of the date portion of each date-time, then compare strings.
Again, the assigned time zone is crucial.
DateTimeFormatter formatter = ISODateTimeFo...
Is there a better way to do optional function parameters in JavaScript? [duplicate]
...
+1, but typeof returns a string, so you need to put quotes around undefined for this to work: if(typeof myVariable == "undefined")...
– Richard Inglis
Jun 4 '12 at 15:10
...
Where can I set environment variables that crontab will use?
...eriod is equivalent to the "source" command: tldp.org/LDP/abs/html/special-chars.html#DOTREF
– Jeff W
Mar 8 '13 at 21:55
...
iOS 7: UITableView shows under status bar
...eck "Shows Navigation Bar" in the inspector. This solves the issue with no extra tweaking needed, and it also preserves your UITableViewController's scene in the storyboard.
Using AutoLayout and embedding the UITableView into another view (I believe this is how Apple wants us to do this):
Create an ...
Image inside div has extra space below the image
...>
Explanation: why is there a gap under the image?
The gap or extra space under the image isn't a bug or issue, it is the default behaviour. The root cause is that images are replaced elements (see MDN replaced elements). This allows them to "act like image" and have their own intrinsic...
Django in / not in query
...
table1.objects.extra(where=["table1.id NOT IN (SELECT table2.key_to_table1 FROM table2 WHERE table2.id = some_parm)"])
share
|
improve th...