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ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
I just discovered a logical bug in my code which was causing all sorts of problems. I was inadvertently doing a bitwise AND instead of a logical AND .
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What is the proper way to re-attach detached objects in Hibernate?
...e to the DB,
and overwrite any intervening updates.
refresh() cannot be called on a detached entity.
lock() cannot be called on a detached entity,
and even if it could, and it did reattach the entity,
calling 'lock' with argument 'LockMode.NONE'
implying that you are locking, but not locking,
i...
Change the font of a UIBarButtonItem
...t implementation:
buttonItem.setTitleTextAttributes([
NSAttributedStringKey.font: UIFont(name: "Helvetica-Bold", size: 26.0)!,
NSAttributedStringKey.foregroundColor: UIColor.green],
for: .normal)
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Removing duplicates from a list of lists
... much easier that it offers good returns on efforts. But sometimes (essentially for "tragically crucial bottlenecks" in deep inner loops of code that's pushing the boundaries of performance limits) one may need to go into much more detail, providing probability distributions, deciding which performa...
Reload django object from database
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Not sure what "All non-deferred fields are updated "mentioned in the docs means?
– Yunti
Nov 13 '15 at 18:15
1
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Why can't I define a static method in a Java interface?
...d(int a, int b) {
return a + b;
}
public static void main(String[] args) {
int result = Arithmetic.multiply(2, 3);
System.out.println(result);
}
}
Result : 6
TIP : Calling an static interface method doesn't require to be implemented by any class. Surely, this ...
How many threads can a Java VM support?
...ust something like
class DieLikeADog {
public static void main(String[] argv){
for(;;){
new Thread(new SomeRunaable).start();
}
}
}
(and don't complain about little syntax details, I'm on my first cup of coffee) then you should cert...
Convert object to JSON in Android
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Most people are using gson : check this
Gson gson = new Gson();
String json = gson.toJson(myObj);
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How to get parameters from the URL with JSP
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In a GET request, the request parameters are taken from the query string (the data following the question mark on the URL). For example, the URL http://hostname.com?p1=v1&p2=v2 contains two request parameters - - p1 and p2. In a POST request, the request parameters are taken from both q...
Haskell: Converting Int to String
I know you can convert a String to an number with read :
3 Answers
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