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How to get index using LINQ? [duplicate]
...
An IEnumerable is not an ordered set.
Although most IEnumerables are ordered, some (such as Dictionary or HashSet) are not.
Therefore, LINQ does not have an IndexOf method.
However, you can write one yourself:
///<summary>Finds the index of the first item...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
...ut not in the way you may think now.
For example, the function
Function<Integer,Integer> f = (x,y) -> x + y
is a constructive one.
As you need to construct something. In the example
you constructed the tuple (x,y). Constructive functions have the problem,
of being not able to handl...
Cooler ASCII Spinners? [closed]
..." >))'>", " >))'>", " >))'>", " >))'>", " <'((<", " <'((<", " <'((<"],
[" /\\O\n /\\/\n /\\\n / \\\n LOL LOL", " _O\n //|_\n |\n /|\n LLOL", " O\n /_\n |\\\n / |\n LOLLOL"],
[
"╔════...
How do I invert BooleanToVisibilityConverter?
...r Convert method, have it return the values you'd like instead of the defaults.
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C# Object Pooling Pattern implementation
...post here.
namespace System.Buffers
{
public abstract class ArrayPool<T>
{
public static ArrayPool<T> Shared { get; internal set; }
public static ArrayPool<T> Create(int maxBufferSize = <number>, int numberOfBuffers = <number>);
public...
How to make a whole 'div' clickable in html and css without JavaScript? [duplicate]
...oice for making this easy and maintainable.
Update:
In HTML5, placing a <div> inside an <a> is valid.
See http://dev.w3.org/html5/markup/a.html#a-changes (thanks Damien)
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impro...
What are the main purposes of using std::forward and which problems it solves?
... in some regard.
The simplest is to use an lvalue-reference:
template <typename A, typename B, typename C>
void f(A& a, B& b, C& c)
{
E(a, b, c);
}
But this fails to handle temporary values: f(1, 2, 3);, as those cannot be bound to an lvalue-reference.
The next attempt m...
C++0x has no semaphores? How to synchronize threads?
...You can easily build one from a mutex and a condition variable:
#include <mutex>
#include <condition_variable>
class semaphore
{
private:
std::mutex mutex_;
std::condition_variable condition_;
unsigned long count_ = 0; // Initialized as locked.
public:
void notify() {
...
Create an Array of Arraylists
... create arrays of parameterized types"
Instead, you could do:
ArrayList<ArrayList<Individual>> group = new ArrayList<ArrayList<Individual>>(4);
As suggested by Tom Hawting - tackline, it is even better to do:
List<List<Individual>> group = new ArrayList<L...
How to center a button within a div?
...Just horizontal (as long as the main flex axis is horizontal which is default)
#wrapper {
display: flex;
justify-content: center;
}
Original Answer using a fixed width and no flexbox
If the original poster wants vertical and center alignment its quite easy for fixed width and height of the b...