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bind event only once
...
If you can apply it, probably want to take a look at event.preventDefault and event.stopPropagation
OR unbind and bind each time, within your method like
function someMethod()
{
$(obj).off('click').on('click', function(e) ...
How does delete[] know it's an array?
... result in undefined behavior. Your second main() example is unsafe, even if it doesn't immediately crash.
The compiler does have to keep track of how many objects need to be deleted somehow. It may do this by over-allocating enough to store the array size. For more details, see the C++ Super FA...
Proper way to rename solution (and directories) in Visual Studio
...file method below (references disappearing), but it can result in problems if your project is under source control (see notes below). This is why step 2 (backup) is so important.
Close Visual Studio.
Create a backup of your .sln file (you can always roll back).
Imagine you want to rename director...
jQuery first child of “this”
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If you want to apply a selector to the context provided by an existing jQuery set, try the find() function:
element.find(">:first-child").toggleClass("redClass");
Jørn Schou-Rode noted that you probably only want to fi...
How can I convert a long to int in Java?
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Casting has different meanings for objects and for primitive types. (int) l doesn't try to treat a 64-bit integer as a 32-bit integer, it actually returns a different 32-bit integer with the same 32 lower order bits. With objects, you c...
How do I call some blocking method with a timeout in Java?
...ions
} finally {
future.cancel(true); // may or may not desire this
}
If the future.get doesn't return in 5 seconds, it throws a TimeoutException. The timeout can be configured in seconds, minutes, milliseconds or any unit available as a constant in TimeUnit.
See the JavaDoc for more detail.
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Removing items from a list [duplicate]
...= list.listIterator(); iter.hasNext(); ) {
String a = iter.next();
if (...) {
iter.remove();
}
}
Making an additional assumption that the list is of strings.
As already answered, an list.iterator() is needed. The listIterator can do a bit of navigation too.
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Check whether a string matches a regex in JS
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Use regex.test() if all you want is a boolean result:
console.log(/^([a-z0-9]{5,})$/.test('abc1')); // false
console.log(/^([a-z0-9]{5,})$/.test('abc12')); // true
console.log(/^([a-z0-9]{5,})$/.test('abc123')); // true
...a...
How to force garbage collection in Java?
Is it possible to force garbage collection in Java, even if it is tricky to do? I know about System.gc(); and Runtime.gc(); but they only suggest to do GC. How can I force GC?
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Regular Expressions- Match Anything
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Normally the dot matches any character except newlines.
So if .* isn't working, set the "dot matches newlines, too" option (or use (?s).*).
If you're using JavaScript, which doesn't have a "dotall" option, try [\s\S]*. This means "match any number of characters that are either whit...