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When and why JPA entities should implement Serializable interface?
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This usually happens if you mix HQL and native SQL queries. In HQL, Hibernate maps the types you pass in to whatever the DB understands. When you run native SQL, then you must do the mapping yourself. If you don't, then the default mapping is to ...
How to programmatically set style attribute in a view
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There is also such a thing as a StateListDrawable which lets you define different drawables for each state the your Button can be in, whether focused, selected, pressed, disabled and so on.
For example, to get your button to change colour when it's pressed, you could define an XML file called res...
Parsing domain from a URL
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parse_url doesn't handle really badly mangled urls very well, but is fine if you generally expect decent urls.
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Defining an array of anonymous objects in CoffeeScript
...h the last item ! See my example below..
– Dean Radcliffe
Oct 11 '13 at 19:41
1
@DeanRadcliffe It...
When do you use map vs flatMap in RxJava?
....subscribe(userInfo -> {
// get user info and you update ui now
});
As you see, in function flatMap applies, at first I get user id from Response then fetch user info. When two requests are finished, we can do our job such as updating UI or save data into database.
However...
Crash logs generated by iPhone Simulator?
...h
Something I haven't yet figured out is how to get them to generate even if the debugger grabs the EXC_BAD_ACCESS signal.
Update
Currently, (OSX 10.11.6), the .crash logs in ~/Library/Logs/DiagnosticReports, are when the emulator itself crashes. Logs for an app crashing (but the emulator devi...
Can an interface extend multiple interfaces in Java?
...// methods
}
A single class can also implement multiple interfaces. What if two interfaces have a method defining the same name and signature?
There is a tricky point:
interface A {
void test();
}
interface B {
void test();
}
class C implements A, B {
@Override
public void tes...
How to set cornerRadius for only top-left and top-right corner of a UIView?
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Pay attention to the fact that if you have layout constraints attached to it, you must refresh this as follows in your UIView subclass:
override func layoutSubviews() {
super.layoutSubviews()
roundCorners(corners: [.topLeft, .topRight], radius: 3....
How can I convert string date to NSDate?
...convert "2014-07-15 06:55:14.198000+00:00" this string date to NSDate in Swift.
18 Answers
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Why is Java Vector (and Stack) class considered obsolete or deprecated?
...ence of operations. Synchronizing individual operations is both less safe (if you iterate over a Vector, for instance, you still need to take out a lock to avoid anyone else changing the collection at the same time, which would cause a ConcurrentModificationException in the iterating thread) but als...