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Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
...he @*ToMany annotation.
But note that in most cases a Set<Child> is more appropriate than List<Child>, so unless you really need a List - go for Set
But remind that with using sets you won't eliminate the underlaying Cartesian Product as described by Vlad Mihalcea in his answer!
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Is Java really slow?
...ime compiled language (C, Fortran, etc.) can beat it; however, Java can be more than 10x as fast as PHP, Ruby, Python, etc. There are specific areas where it can beat common compiled languages (if they use standard libraries).
There is no excuse for "slow" Java applications now. Developers and lega...
JSON and XML comparison [closed]
... change the details to make what I'm saying not quite valid.
JSON is both more compact and (in my view) more readable - in transmission it can be "faster" simply because less data is transferred.
In parsing, it depends on your parser. A parser turning the code (be it JSON or XML) into a data struc...
Can a C# lambda expression have more than one statement?
Can a C# lambda expression include more than one statement?
8 Answers
8
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How can I quantify difference between two images?
... want to normalize images.
But be careful, in some situations this may do more wrong than good. For example, a single bright pixel on a dark background will make the normalized image very different.
Is color information important?
If you want to notice color changes, you will have a vector of colo...
Difference between Covariance & Contra-variance
...es of a mapping function that associates one member of a set with another. More specifically, a mapping can be covariant or contravariant with respect to a relation on that set.
Consider the following two subsets of the set of all C# types. First:
{ Animal,
Tiger,
Fruit,
Banana }.
And s...
Filter Java Stream to 1 and only 1 element
...xception as argument in the constructor, tweak it to allow two values, and more.
An alternative — arguably less elegant — solution:
You can use a 'workaround' that involves peek() and an AtomicInteger, but really you shouldn't be using that.
What you could do istead is just collecting it in a Li...
Red black tree over avl tree
... there are following points of comparison between the two:
AVL trees are more rigidly balanced and hence provide faster look-ups. Thus for a look-up intensive task use an AVL tree.
For an insert intensive tasks, use a Red-Black tree.
AVL trees store the balance factor at each node. This takes O(N)...
How to choose between Hudson and Jenkins? [closed]
...Jan/2011)
I have no idea how rapid the change of each branch is now, but more importantly, what is the direction each branch is taking and what are key points so one could make a choice between which to go with?
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Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...hey behave almost the same.
But when you come to checks that are somewhat more complex, then the advantage becomes more visible:
assertTrue(foo.contains("someValue") && foo.contains("anotherValue"));
vs.
assertThat(foo, hasItems("someValue", "anotherValue"));
One can discuss which one...