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Stream vs Views vs Iterators
...ively defined). One can avoid keeping all of the Stream in memory, though, by making sure you don't keep a reference to its head (for example, by using def instead of val to define the Stream).
Because of the penalties incurred by views, one should usually force it after applying the transformation...
What is the difference between an ordered and a sorted collection?
... be from min number to max number
for a person collection, it may be sored by the height of persons or the weight of persons, etc.
When talking about order, it usually means the order of insertion. The order may be changed after sorting
...
What is the default value for enum variable?
...he documentation:
The default value of an enum E is the value produced by the expression (E)0.
As an example, take the following enum:
enum E
{
Foo, Bar, Baz, Quux
}
Without overriding the default values, printing default(E) returns Foo since it's the first-occurring element.
However, ...
Change priorityQueue to max priorityqueue
...is overflow problem when using simple lambda as comparator, as pointed out by Фима Гирин.
// PriorityQueue<Integer> pq = new PriorityQueue<>((x, y) -> y - x);
PriorityQueue<Integer> pq =new PriorityQueue<>((x, y) -> Integer.compare(y, x));
pq.add(10);
pq.add(...
TypeScript typed array usage
...
It is also the suggested method from typescript for array declaration.
By using the Array<Thing> it is making use of the generics in typescript. It is similar to asking for a List<T> in c# code.
// Declare with default value
private _possessions: Array<Thing> = new Array<T...
Using an ORM or plain SQL? [closed]
.... They generally handle one-to-many relationships pretty elegantly as well by instantiating nested objects. I've found if you design your database with the strengths and weaknesses of the ORM in mind, it saves a lot of work in getting data in and out of the database. (You'll want to know how it hand...
jQuery Ajax POST example with PHP
...).always();
PHP (that is, form.php):
// You can access the values posted by jQuery.ajax
// through the global variable $_POST, like this:
$bar = isset($_POST['bar']) ? $_POST['bar'] : null;
Note: Always sanitize posted data, to prevent injections and other malicious code.
You could also use the...
How does generic lambda work in C++14?
...neric lambdas were introduced in C++14.
Simply, the closure type defined by the lambda expression will have a templated call operator rather than the regular, non-template call operator of C++11's lambdas (of course, when auto appears at least once in the parameter list).
So your example:
auto ...
How to compile without warnings being treated as errors?
...
Somewhere it must be set, by default warnings aren't treated as errors by any compiler I know. If you can't find it, you can try overriding it with -Wno-error, as nightcracker suggested. That should work unless the -Werror is passed after the flags yo...
Remove .php extension with .htaccess
...write
requested URLs on the fly.
Generally speaking, mod_rewrite works by matching the requested document against specified regular expressions, then performs URL rewrites internally (within the apache process) or externally (in the clients browser). These rewrites can be as simple as internally...