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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
.... The MyRotationDetector.aix extension is available here:
https://drive.google.com/drive/folders/0B3jsksMcCW5bLVZCNjZmQ3FSS2M
We’ve also provided the complete aia source for this demo app to save you the effort of assembling the blocks from scratch. If you load this aia file into App Inventor...
How to extend an existing JavaScript array with another array, without creating a new array
...r really answered the question, but it was a 2015 hack around first-hit-on-Google :)
For those that simply searched for "JavaScript array extend" and got here, you can very well use Array.concat.
var a = [1, 2, 3];
a = a.concat([5, 4, 3]);
Concat will return a copy the new array, as thread sta...
Flatten List in LINQ
...s forget this one -- I know it's there, but I just spend way too much time Googling for it every time I need to use it. Bookmarking this answer. :-)
– BrainSlugs83
Dec 19 '13 at 18:51
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Using CSS to insert text
...
To cover older IE, you can conditionally include code.google.com/p/ie7-js which will allow your CSS to remain the same for all browsers. It's an alternative to jQuery that is closer to standards.
– system PAUSE
Apr 29 '10 at 23:22
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Using the scrollwheel in GNU screen
... mouse's scrollwheel to scroll around in the scrollback buffer? I tried to Google about this, but most hits were on how to allow applications inside screen to use the scrollwheel.
...
AsyncTask and error handling on Android
.... If so, show an error message." (From the user "Streets of Boston" groups.google.com/group/android-developers/browse_thread/thread/…)
– OneWorld
Oct 12 '10 at 15:06
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@RequestParam in Spring MVC handling optional parameters
....util.OptionalDouble, java.util.OptionalInt, java.util.OptionalLong or com.google.common.base.Optional as the type for a field or a parameter. Optional was designed to provide a limited mechanism for library method return types where there needed to be a clear way to represent "no result". Using a f...
What is the best regular expression to check if a string is a valid URL?
... a great solution for recognizing URLs in most used formats such as:
www.google.com
http://www.google.com
mailto:somebody@google.com
somebody@google.com
www.url-with-querystring.com/?url=has-querystring
The regular expression used is:
/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z...
What is ASP.NET Identity's IUserSecurityStampStore interface?
... But if the user's password is changed, or a login is removed (unlink your google/fb account), the stamp will change. This is needed for things like automatically signing users/rejecting old cookies when this occurs, which is a feature that's coming in 2.0.
Identity is not open source yet, its cur...
WebSocket with SSL
... @muaaz sorry, I don't know the apache configuration apart from googling it myself.
– kanaka
Jan 12 '16 at 22:03
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