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Ball to Ball Collision - Detection and Handling
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To detect whether two balls collide, just check whether the distance between their centers is less than two times the radius. To do a perfectly elastic collision between the balls, you only need to worry about the component of the velocity that is ...
Run PHP Task Asynchronously
...egistration' button, I don't want to make them wait until the email is actually sent, I just want to start the process, and return a message to the user right away.
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Remove Elements from a HashSet while Iterating [duplicate]
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You can manually iterate over the elements of the set:
Iterator<Integer> iterator = set.iterator();
while (iterator.hasNext()) {
Integer element = iterator.next();
if (element % 2 == 0) {
iterator.remove();
}
}...
Error when deploying an artifact in Nexus
... I changed version of my artifact to SNAPSHOT and then deploy and all was ok. Then I realized that I was trying to deploy to a Nexus group (not a Nexus repository), so the cause of my problem was: 'url to my nexus repository was wrong'
– acimutal
Sep 1...
When is .then(success, fail) considered an antipattern for promises?
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What's the difference?
The .then() call will return a promise that will be rejected in case the callback throws an error. This means, when your success logger fails, the error would be passed to the following .catch() callback, but not to the fail callback that...
How can I check which version of Angular I'm using?
... huge file for a license. Second, relying on license file/comment is not really a great choice since it may change by a minfier bug.
– Afshin Moazami
Dec 8 '15 at 15:23
3
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Using str_replace so that it only acts on the first match?
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There's no version of it, but the solution isn't hacky at all.
$pos = strpos($haystack, $needle);
if ($pos !== false) {
$newstring = substr_replace($haystack, $replace, $pos, strlen($needle));
}
Pretty easy, and saves the performance penalty of regular expressions.
Bonus: If...
Why do we use volatile keyword? [duplicate]
...imizing the while loop. That is where the volatile keyword plays its role. All you need to do is this,
volatile int some_int = 100; //note the 'volatile' qualifier now!
In other words, I would explain this as follows:
volatile tells the compiler that,
"Hey compiler, I'm volatile and, you
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IntelliJ does not show project folders
...for me. I had to "Add Content Root" on that screen. Then for some reason all the folders magically appeared.
– Lavamantis
Jun 25 '15 at 20:39
2
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Check if Internet Connection Exists with Javascript? [duplicate]
...browsers, doing so with older web browsers may not work as expected, or at all.
Alternatively, an XHR request to your own server isn't that bad of a method for testing your connectivity. Considering one of the other answers state that there are too many points of failure for an XHR, if your XHR is ...