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Why is quicksort better than mergesort?
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QuickSort is more popular because it:
Is in-place (MergeSort requires extra memory linear to number of elements to be sorted).
Has a small hidden constant.
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What issues should be considered when overriding equals and hashCode in Java?
...pache Commons Lang library. An example:
public class Person {
private String name;
private int age;
// ...
@Override
public int hashCode() {
return new HashCodeBuilder(17, 31). // two randomly chosen prime numbers
// if deriving: appendSuper(super.hashCode()...
How do I set the offset for ScrollSpy in Bootstrap?
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Does this effectively add extra space on the div you're targeting? What if you don't want that? An invisible extra spacing would be ideal.
– ahnbizcad
Jan 28 '15 at 23:52
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Has anyone ever got a remote JMX JConsole to work?
...e ports for RMI, and those are probably blocked by a firewall.
One of the extra ports will not be know up front if you use the default RMI configuration, so you have to open up a big range of ports - which might not amuse the server administrator.
There is a solution that does not require opening ...
Calculate distance between two latitude-longitude points? (Haversine formula)
...it's pretty much the same as the values obtained from Apple's Map app :-)
Extra update:
If you are using iOS4 or later then Apple provide some methods to do this so the same functionality would be achieved with:
-(double)kilometresBetweenPlace1:(CLLocationCoordinate2D) place1 andPlace2:(CLLocatio...
Why do we copy then move?
...vided a viable move constructor exists) rather than being copied. And std::string does have a move constructor.
Unlike in C++03, in C++11 it is often idiomatic to take parameters by value, for the reasons I am going to explain below. Also see this Q&A on StackOverflow for a more general set of ...
How to sort an array in descending order in Ruby
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Super useful. Thanks for the extra effort.
– Joshua Pinter
Jan 25 '12 at 23:36
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Basic HTTP and Bearer Token Authentication
... this:
location /api {
try_files $uri $uri/ /index.php?$query_string;
}
location / {
try_files $uri $uri/ /index.php?$query_string;
auth_basic "Enter password";
auth_basic_user_file /path/to/.htpasswd;
}
Authorization: Bearer will do the job of de...
How to escape single quotes within single quoted strings
...between (1) and (2), or between (4) and (5), the shell will interpret that string as a one long word.
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Do DOM tree elements with ids become global variables?
...article about why global variables are bad. Simply put, having a bunch of extra global variables leads to more bugs. Let's say you accidentally type the name of a var and happen to type an id of a DOM node, SURPRISE!
Additionally, despite being standardized there are still quite a few discrepanci...