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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
...e function Detect is fired when the user performs a gesture, and returns a string which is the name of the recognized gesture. If no gesture is detected, the returned string is empty. The function EnableDetection and DisableDetection are used to switch on and off the detection respectively.
Figure ...
How to check if a value exists in an array in Ruby
...
Very useful if you want check any/all of those string is included in another string/constant
– thanikkal
Jul 12 '12 at 12:40
...
How to handle AccessViolationException
... Console.WriteLine("After call. param been there? : " + p.BeenThere.ToString()); //never stops here
}
catch (Exception exc)
{
Console.WriteLine($"CSE: {exc.ToString()}");
}
Console.ReadLine();
}
private static void ExecInAnotherDomai...
Linq select objects in list where exists IN (A,B,C)
...ay if it contains more than 1000 items. var allowedStatus = new HashSet<string> { "A", "B", "C" };
– Jay Shah
Nov 9 '18 at 18:14
...
How to recover a dropped stash in Git?
...nt $3}'
...or using Powershell for Windows:
git fsck --no-reflog | select-string 'dangling commit' | foreach { $_.ToString().Split(" ")[2] }
This will show you all the commits at the tips of your commit graph which are no longer referenced from any branch or tag – every lost commit, including ev...
SSL handshake alert: unrecognized_name error since upgrade to Java 1.7.0
... the host.
This code failed:
public class a {
public static void main(String [] a) throws Exception {
java.net.URLConnection c = new java.net.URL("https://mydomain.com/").openConnection();
c.setDoOutput(true);
c.getOutputStream();
}
}
And this code worked:
public class a...
How do I make class methods / properties in Swift?
...thods and you use the class or static keywords.
class Foo {
var name: String? // instance property
static var all = [Foo]() // static type property
class var comp: Int { // computed type property
return 42
}
class func alert() { // type method
...
How to Display blob (.pdf) in an AngularJS app
...s.setContentType(MediaType.parseMediaType("application/pdf"));
String filename = "test.pdf";
headers.setContentDispositionFormData(filename, filename);
ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(contents, headers, HttpStatus.OK);
...
What is a sealed trait?
...ealed trait is
JSON.
A JSON value can only be JSON null, boolean, number, string, array, or dictionary.
JSON has not changed in 20 years, so it is unlikely that anyone will need to extend our JSON
with additional subclasses.
While the set of sub-classes is fixed, the range of operations we may want...
how to use XPath with XDocument?
...it misleading and confusing here. You can use anything except, with XPath, String.Empty (as the asker discovered). "demo" would be more appropriate to the example.
– Tom Blodget
Feb 16 '16 at 4:05
...