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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...
How do I invert BooleanToVisibilityConverter?
...r Convert method, have it return the values you'd like instead of the defaults.
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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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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...
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...
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() {
...
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...
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...
How do I convert an enum to a list in C#? [duplicate]
...
This will return an IEnumerable<SomeEnum> of all the values of an Enum.
Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>();
If you want that to be a List<SomeEnum>, just add .ToList() after .Cast<SomeEnum>().
To use the Cast funct...
Determine the data types of a data frame's columns
...
set.seed(3221) # this makes the example exactly reproducible
my.data <- data.frame(y=rnorm(5),
x1=c(1:5),
x2=c(TRUE, TRUE, FALSE, FALSE, FALSE),
X3=letters[1:5])
@Wilmer E Henao H's solution is very streamlined:
sapply(...