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@UniqueConstraint annotation in Java
...rite
@Column(unique=true)
String username;
The @UniqueConstraint annotation is for annotating multiple unique keys at the table level, which is why you get an error when applying it to a field.
References (JPA TopLink):
@UniqueConstraint
@Column
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How to dismiss ViewController in Swift?
...s a ViewController in swift by calling dismissViewController in an IBAction
20 Answers
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What's the difference between QMainWindow, QWidget and QDialog?
... to be shown as a window. It will always appear in a window, and has functions to make it work well with common buttons on dialogs (accept, reject, etc.).
QMainWindow is designed around common needs for a main window to have. It has predefined places for a menu bar, a status bar, a toolbar, and o...
What's the right OAuth 2.0 flow for a mobile app
I am trying to implement delegated authorization in a Web API for mobile apps using OAuth 2.0. According to specification, the implicit grant flow does not support refresh tokens, which means once an access token is granted for an specific period of time, the user must grant permissions to the app a...
How do I remove a MySQL database?
You may notice from my last question that a problem caused some more problems, Reading MySQL manuals in MySQL monitor?
6 A...
Checking if a folder exists using a .bat file [closed]
...he name of your file.
For a directory look at this https://jeffpar.github.io/kbarchive/kb/065/Q65994/
C:
IF NOT EXIST C:\WIN\ GOTO NOWINDIR
CD \WIN
:NOWINDIR
trailing backslash ('\') seems to be enough to distinguish between directories and ordinary files.
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Mock framework vs MS Fakes frameworks
...owever the approach is different, Fakes generates code to achive this functionality but Mocks framework does not. So is my understanding correct? Is Fakes just another Mock framework
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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
...ync() is synchronous). The use of dispatch_once() replaces the following idiom:
+ (MyClass *)sharedInstance {
static MyClass *sharedInstance;
@synchronized(self) {
if (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInst...
“Could not find bundler” error
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if you create a new applocation - rails new and if you get this error?
– AMIC MING
Mar 19 '13 at 0:35
2
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What is Mocking?
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Prologue: If you look up the noun mock in the dictionary you will find that one of the definitions of the word is something made as an imitation.
Mocking is primarily used in unit testing. An object under test may
have dependencies on other (complex) objects. To isolate the...