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Why does Clojure have “keywords” in addition to “symbols”?
...ways identical, they contains their own hash values.
As search in maps and sets are made from hash keys this envolves better search efficiency in case of numerous searches, not in the search itself.
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Which concurrent Queue implementation should I use in Java?
...he easiest first, ArrayBlockingQueue is a queue of a fixed size. So if you set the size at 10, and attempt to insert an 11th element, the insert statement will block until another thread removes an element. The fairness issue is what happens if multiple threads try to insert and remove at the same t...
NSInvocation for Dummies?
...ext, you would specify which object to send the message to:
[myInvocation setTarget:myArray];
Specify the message you wish to send to that object:
[myInvocation setSelector:@selector(addObject:)];
And fill in any arguments for that method:
[myInvocation setArgument:&myString atIndex:2];
...
Android static object lifecycle
I am creating event search application, we set search criteria from one screen populate in another screen then user can edit search criteria from 3rd screen and goes to 4th screen.
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What data is stored in Ephemeral Storage of Amazon EC2 instance?
...rror anyway: Unable to connect to your database server using the provided settings. Filename: core/Loader.php Line Number: 346 Any ideas? This wasn't happening prior to doing this.
– James
Sep 11 '14 at 0:50
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possibly undefined macro: AC_MSG_ERROR
... I had this exact same problem and found that I'd missed out setting ACLOCAL_AMFLAGS in Makefile.am - thanks!
– simpleigh
Sep 6 '14 at 14:31
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error, string or binary data would be truncated when trying to insert
...= new StringBuilder();
foreach (object update in context.GetChangeSet().Updates)
{
FindLongStrings(update, sb);
}
foreach (object insert in context.GetChangeSet().Inserts)
{
FindLongStrings(insert, sb);
}
return sb.ToS...
How can I sort a List alphabetically?
...ns.sort(listOfCountryNames, Collator.getInstance());
Solution with a TreeSet
If you are free to decide, and if your application might get more complex, then you might change your code to use a TreeSet instead. This kind of collection sorts your entries just when they are inserted. No need to call...
WaitAll vs WhenAll
... a Faulted state, where its exceptions will contain the aggregation of the set of unwrapped exceptions from each of the supplied tasks."
– Dasith Wijes
Apr 4 '19 at 12:29
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Is there something like Annotation Inheritance in java?
...annotationType) {
return findAnnotation(clazz, annotationType, new HashSet<Annotation>());
}
@SuppressWarnings("unchecked")
private static <A extends Annotation> A findAnnotation(Class<?> clazz, Class<A> annotationType, Set<Annotation> visited) {
try {
...