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Best way to convert IList or IEnumerable to Array
...omething like this:
IEnumerable query = ...;
MyEntityType[] array = query.Cast<MyEntityType>().ToArray();
If you don't know the type within that method but the method's callers do know it, make the method generic and try this:
public static void T[] PerformQuery<T>()
{
IEnumerabl...
Swapping two variable value without using third variable
...ks for all integer values (that includes pointers then, with some luck and casting). For the sake of completeness I would like to mention another less powerful algorithm with addition/subtraction:
A = A + B
B = A - B
A = A - B
Here you have to be careful of overflows/underflows, but otherwise it ...
What does T&& (double ampersand) mean in C++11?
...t[]> ptr2{ptr1};// compile error: no copy ctor.
// So we must first cast ptr1 to an rvalue
std::unique_ptr<int[]> ptr2{std::move(ptr1)};
std::unique_ptr<int[]> TakeOwnershipAndAlter(std::unique_ptr<int[]> param,\
int size)
{
for (auto i = 0; i < size; ++i) {...
Static variables in JavaScript
...design template for classes.
It also answers your question:
function Podcast() {
// private variables
var _somePrivateVariable = 123;
// object properties (read/write)
this.title = 'Astronomy Cast';
this.description = 'A fact-based journey through the galaxy.';
this.link...
Null coalescing in powershell
...ll values in the same order as the array created in Step 1.
[0] is used to select the first element of the filtered array.
Simplifying that:
Create an array of possible values, in preferred order
Exclude all null values from the array
Take the first item from the resulting array
Caveats
Unlik...
C read file line by line
...
Why the cast (FILE*) fp ? Isn't fp is already a FILE * and also fopen() returns a FILE * ?
– Accountant م
Apr 4 '19 at 23:25
...
When do Java generics require
...
On the assertThat making sure the cast is performed for you, the matcher.matches() method doesn't care, so since the T is never used, why involve it? (the method return type is void)
– Yishai
May 22 '09 at 14:30
...
How can one print a size_t variable portably using the printf family?
...ode into a file that's compiled as C99. Otherwise, your only option is to cast your variables to unsigned long long and use %llu to be maximally portable.
– Adam Rosenfield
Apr 13 '10 at 1:52
...
Best practices to handle routes for STI subclasses in rails
...subclassing (unlike Rails 4) and works in Rails 3.
# initializers/acts_as_castable.rb
module ActsAsCastable
extend ActiveSupport::Concern
module ClassMethods
def new_with_cast(*args, &block)
if (attrs = args.first).is_a?(Hash)
if klass = descendant_class_from_attrs(attrs...
Should I store entire objects, or pointers to objects in containers?
...class pointers, and to handle all the collateral damage in object storage, casting, and so on. It took me a couple of months to convince myself that the new code was working. Incidentally, this made me think hard about how well-designed C++'s object model is.
On my current big project, my central d...