大约有 1,900 项符合查询结果（耗时：0.0271秒） [XML]
JPA: How to have one-to-many relation of the same Entity type
...ip is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@ManyToOne
private A pa...
How to Apply Gradient to background view of iOS Swift App
...ar gl:CAGradientLayer!
init() {
let colorTop = UIColor(red: 192.0 / 255.0, green: 38.0 / 255.0, blue: 42.0 / 255.0, alpha: 1.0).cgColor
let colorBottom = UIColor(red: 35.0 / 255.0, green: 2.0 / 255.0, blue: 2.0 / 255.0, alpha: 1.0).cgColor
self.gl = CAGradientLayer()
...
What are the new documentation commands available in Xcode 5? [closed]
...
Swift 2.0 uses the following syntax:
/**
Squares a number.
- parameter parameterName: number The number to square.
- returns: The number squared.
*/
Notice how @param is now - parameter.
You can al...
Location Manager Error : (KCLErrorDomain error 0)
...was unable to obtain a
location value right now.Available in
iPhone OS 2.0 and later. Declared in
CLError.h.
kCLErrorDenied Access to the location
service was denied by the user.
Available in iPhone OS 2.0 and later.
Declared in CLError.h.
kCLErrorNetwork The network was
unav...
SPA best practices for authentication and session management
... and further down the path of plain ol' RPC on a stateful server.
OAuth 2.0
OAuth 2.0 looks at the problem of "How does Software A give Software B access to User X's data without Software B having access to User X's login credentials."
The implementation is very much just a standard way for a u...
How do I make UILabel display outlined text?
....foregroundColor : UIColor.white,
NSAttributedStringKey.strokeWidth : -2.0,
]
myLabel.attributedText = NSAttributedString(string: "Foo", attributes: strokeTextAttributes)
Swift 4.2:
let strokeTextAttributes: [NSAttributedString.Key : Any] = [
.strokeColor : UIColor.black,
.foregr...
How do I change the default port (9000) that Play uses when I execute the “run” command?
...- Staged Distribution
Create a staged distribution:
sbt stage
For Play 2.0.x and 2.1.x use the target/start script (Unix Only):
target/start -Dhttp.port=8080
For Play 2.2.x & 2.3.x use the appropriate start script in the target/universal/stage/bin directory:
target/universal/stage/bin/[a...
How can I list all tags in my Git repository by the date they were created?
...rder of form rc-X.Y.Z.W?", you can add a sort order to git tag (since Git 2.0 June 2014).
That sort order includes as field name (listed in git for-each-ref) taggerdate. That allows for git tag --sort=taggerdate (mentioned by DarVar below)
As an example, in the git/git repo it will list the v2.10....
How to tell Jackson to ignore a field during serialization if its value is null?
...
To suppress serializing properties with null values using Jackson >2.0, you can configure the ObjectMapper directly, or make use of the @JsonInclude annotation:
mapper.setSerializationInclusion(Include.NON_NULL);
or:
@JsonInclude(Include.NON_NULL)
class Foo
{
String bar;
}
Alternativ...
Try/Catch block in PHP not catching Exception
...ug 12 2010 17:32:30)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
with eAccelerator v0.9.5.1, Copyright (c) 2004-2006 eAccelerator, by eAccelerator
The solution is to either disable eAccelerator or update it. I tried both and both of the f...