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Hibernate SessionFactory vs. JPA EntityManagerFactory
...EntityManager translate entity state transitions into SQL statements, like SELECT, INSERT, UPDATE, and DELETE.
Hibernate vs. JPA bootstrap
When bootstrapping a JPA or Hibernate application, you have two choices:
You can bootstrap via the Hibernate native mechanism, and create a SessionFactory vi...
What is a NullReferenceException, and how do I fix it?
... to find out where the reference is or isn't set, right-click its name and select "Find All References". You can then place a breakpoint at every found location and run your program with the debugger attached. Every time the debugger breaks on such a breakpoint, you need to determine whether you exp...
How does Python manage int and long?
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Comment by Ted : As mentioned below beware that casting something to int that is larger than maxint will still result in a long >>>type(int(sys.maxint+1)) <type 'long'>
– StuartLC
Oct 25 '12 at 9:51
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Why doesn't Java allow generic subclasses of Throwable?
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Yes, but why isn't it flagged as "unsafe" then, as with casts for example?
– eljenso
Feb 1 '09 at 19:17
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Convert integer to string Jinja
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I found the answer.
Cast integer to string:
myOldIntValue|string
Cast string to integer:
myOldStrValue|int
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How to get current time in milliseconds in PHP?
... decimals
1409263371904
Note that both $mt[1] and the result of round are casted to int. This is necessary because they are floats and the operation on them without casting would result in the function returning a float.
Finally, that function is slightly more precise than
round(microtime(true)*100...
Should I store entire objects, or pointers to objects in containers?
...class pointers, and to handle all the collateral damage in object storage, casting, and so on. It took me a couple of months to convince myself that the new code was working. Incidentally, this made me think hard about how well-designed C++'s object model is.
On my current big project, my central d...
How to generate a random number in C++?
...is intuition it is
only natural to search the web for some magic spells to cast to get
such random number in any possible context.
^^^ THAT kind of intuitive expectations IS VERY WRONG and harmful in all cases involving Pseudo-Random Number Generators - despite being reasonable for true random numb...
Useful GCC flags for C
...-arith: warn if anything depends upon the size of a function or of void.
-Wcast-align: warn whenever a pointer is cast such that the required alignment of the target is increased. For example, warn if a char * is cast to an int * on machines where integers can only be accessed at two- or four-byte ...
Calling Java varargs method with single null argument?
...ray. For a single argument it assumes the latter.
You have two choices. Cast the null explicitly to Object or call the method using a strongly typed variable. See the example below:
public class Temp{
public static void main(String[] args){
foo("a", "b", "c");
foo(null, null);
...