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Why does i = i + i give me 0?
...rator -.
If an integer addition overflows, then the result is the low-order
bits of the mathematical sum as represented in some sufficiently large
two's-complement format. If overflow occurs, then the sign of the
result is not the same as the sign of the mathematical sum of the two
oper...
JComboBox Selection Change Listener?
...
I know this question is old, but in order to complement, ActionListener is also fired if addItem method is called.
– Gabriel Câmara
Feb 23 '15 at 16:01
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Why was the switch statement designed to need a break?
...getting the break where it is needed. 2) If the case statements have their order changed, the fallthrough can result in the wrong case being run. Thus, I find C#'s handling much better (explicit goto case for fallthrough, except for empty case labels).
– Daniel Rose
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Get a list of resources from classpath directory
... * the pattern to match
* @return the resources in the order they are found
*/
public static Collection<String> getResources(
final Pattern pattern){
final ArrayList<String> retval = new ArrayList<String>();
final String classPat...
How to simulate a button click using code?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How to search and replace globally, starting from the cursor position and wrapping around the end of
...pattern or flags
are altered in the first one.
2. To save some typing, in order to bring up the skeleton of
the above substitution command in the command line, one can define
a Normal-mode mapping, like so:
:noremap <leader>cs :,$s///gc\|1,''-&&<c-b><right><right><...
What does $NON-NLS-1$ mean?
...has the ability to flag non-externalized strings as a warning or error, in order to facilitate enablement of National Language Support (NLS). EMF-generated code does not use hard coded strings for messages that the user will see; however, string literals do appear frequently, for example, as keys fo...
What is the difference between a var and val definition in Scala?
...a number out of them. For example, if I have a queue with 2, 1, 3, in that order, I want to get back the number 213. Let's first solve it with a mutable.Queue:
def toNum(q: scala.collection.mutable.Queue[Int]) = {
var num = 0
while (!q.isEmpty) {
num *= 10
num += q.dequeue
}
num
}
...
How to Define Callbacks in Android?
...allback. a Handler.Callback can be passed to the constructor of Handler in order to avoid extending Handler directly. thus, to execute some code via callback from the current thread:
Message message = new Message();
<set data to be passed to callback - eg message.obj, message.arg1 etc - here>...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
...t([:first,:email]).group(:first,:email).having("count(*) > 1").count in order to work.
– Rafael Oliveira
Oct 6 '14 at 22:27
4
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