When the destructor for std::thread is invoked, a call to either join() or detach() must have been made. If a thread has not been joined or detached, then by default std::terminate will be called. Using RAII, this is generally simple enough to accomplish:
class thread_joiner
{
public:
thre...
Once registered a dependency can be retrieved by adding parameters on the Controller constructor.
// ...
using System;
using Microsoft.Extensions.DependencyInjection;
namespace Core.Controllers
{
public class HomeController : Controller
{
public HomeController(ITestServic...
We can use partial application to "lock" the first argument. After applying one argument we are left with a function which expects one more argument before returning the result.
(+) :: Int -> Int -> Int
addOne :: Int -> Int
addOne = (+) 1
We can then use addOne in order to...
Returning partially applied functions is one technique to write concise code.
add :: Int -> Int -> Int
add x = (+x)
add 5 2
In this example (+x) is a partially applied function. Notice that the second parameter to the add function does not need to be specified in the function definitio...
Model
using System.ComponentModel.DataAnnotations;
public class ViewModel
{
[Required(ErrorMessage="Name is required")]
public string Name { get; set; }
[StringLength(14, MinimumLength = 14, ErrorMessage = "Invalid Phone Number")]
[Required(ErrorMessag...
With this declaration:
fun Temporal.toIsoString(): String = DateTimeFormatter.ISO_INSTANT.format(this)
You can now simply:
val dateAsString = someInstant.toIsoString()
Let's say you have an object like this:
var myObject = {
name: 'Peter'
}
Later in your code, you try to access myObject.name and you get George instead of Peter. You start wondering who changed it and where exactly it was changed. There is a way to place a debugger (or something else) on e...
In the simple example, we simply set the width of the rectangle to that of it's parent. Let's consider a more complicated example:
ApplicationWindow {
visible: true
width: 400
height: 640
Rectangle{
id: rect
anchors.centerIn: parent
height: 100
...
Sample Data:
CREATE TABLE table_name ( id, list ) AS
SELECT 1, 'a,b,c,d' FROM DUAL UNION ALL -- Multiple items in the list
SELECT 2, 'e' FROM DUAL UNION ALL -- Single item in the list
SELECT 3, NULL FROM DUAL UNION ALL -- NULL list
SELECT 4, 'f,,g' FROM DUAL; -- NULL item...
Often people try to index some content and then find it. If they cannot see the expected result, they try to troubleshoot the whole end-to-end process. The better way is to see whether the content actually indexed in the expected fields. This way it splits the problem into two: indexing and searchin...
Two Random class created at the same time will have the same seed value.
Using System.Guid.NewGuid().GetHashCode() can get a different seed even in the same time.
Random rnd1 = new Random();
Random rnd2 = new Random();
Console.WriteLine("First 5 random number in rnd1");
for (int i = 0...
Large Multi-Line strings are burdensome to write.
my $variable = <<'EOF';
this block of text is interpreted literally,
no \'quotes matter, they're just text
only the trailing left-aligned EOF matters.
EOF
NB: Make sure you ignore stack-overflows syntax highlighter: It is very wrong.
A...
Introduction
The BufferedReader class is a wrapper for other Reader classes that serves two main purposes:
A BufferedReader provides buffering for the wrapped Reader. This allows an application to read characters one at a time without undue I/O overheads.
A BufferedReader provides functi...
If you use an index that is sorted the way you would retrieve it, the SELECT statement would not do additional sorting when in retrieval.
CREATE INDEX ix_scoreboard_score ON scoreboard (score DESC);
When you execute the query
SELECT * FROM scoreboard ORDER BY score DESC;
The database system ...
In the Project.pro file we add : CONFIG += sql
in MainWindow.h we write :
#include <QMainWindow>
#include <QSql>
#include <QDebug>
namespace Ui
{
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget...
Layout
Unity basic editor will look like below. Basic functionalities of some default windows/tabs are described in the image.
Linux Layout
There is a little difference in menu layout of linux version, like the screenshot below,
Basic Usage
Create an empty GameObject by right clicking in th...
