constructor Questions
4
I'm trying to embrace C# 8's nullable references types in my project and make it smoothly work with EF Core.
Following this guide, I made my entity classes have constructors accepting all data nee...
Badminton asked 15/4, 2020 at 6:48
8
Solved
I've heard about this happening in non thread-safe code due to improperly constructed objects but I really don't have the concept down, even after reading about in in Goetz's book. I'd like to soli...
Nonmoral asked 19/10, 2009 at 12:30
5
Solved
I can get the ID of the authenticated user like this:
Auth::user()->id = $id;
Great it works, ... but I have a load of methods which need it and I want a cleaner way of adding it to the clas...
Husch asked 22/6, 2015 at 21:59
0
I can declare a C# positional record like this:
public record Box(double Capacity);
which results in the definition of a record class named Box with a property named Capacity, as well as a primary...
Hulahula asked 31/3, 2024 at 13:56
1
Solved
It is not very rare to find a library that zeros its objects in the constructors using memset. And sometimes it happens to empty classes as well. Is it safe, especially when one inherits such class...
Vivyan asked 25/3, 2024 at 18:21
7
Solved
Are constructors allowed to throw exceptions?
Outdoor asked 3/9, 2009 at 3:58
3
I have a Python class that issues a warning inside __init__(). It also provides a factory class method for opening and reading a file:
from warnings import warn
class MyWarning(Warning):
"""Warn...
Smectic asked 28/1, 2019 at 10:0
7
I'm just a beginner in Python and programming in general, and have some questions about the unittest module.
I have a class, and in the __init__ method I am doing some assertions to check for bad...
Chubby asked 15/6, 2009 at 17:10
2
Solved
I am dealing with stop the constructor.
public function __construct()
{
$q = explode("?",$_SERVER['REQUEST_URI']);
$this->page = $q[0];
if (isset($q[1]))
$this->querystring = '?'.$q[1];...
Suave asked 2/1, 2015 at 12:54
14
How do I create a private constructor which should be called only by the static function of the class and not from else where?
Disheveled asked 21/11, 2011 at 12:48
14
Solved
Is there a way to have some kind of default constructor (like a C++ one) for C user types defined with a structure?
I already have a macro which works like a fast initializer (like the one for pth...
Aubine asked 11/2, 2009 at 15:11
13
Solved
#include <iostream>
using namespace std;
class T1
{
const int t = 100;
public:
T1()
{
cout << "T1 constructor: " << t << endl;
}
};
When I am trying to i...
Pigweed asked 24/1, 2013 at 6:53
7
Solved
I am writing an application that requires me to take a proprietary bitmap format (an MVTec Halcon HImage) and convert it into a System.Drawing.Bitmap in C#.
The only proprietary functions given to...
Fermentative asked 2/2, 2010 at 16:56
18
Solved
It's weird that this is the first time I've bumped into this problem, but:
How do you define a constructor in a C# interface?
Edit
Some people wanted an example (it's a free time project, so yes,...
Volitive asked 6/3, 2009 at 18:13
1
Solved
From the C++ standard working draft:
Default constructors ([class.default.ctor]), copy constructors, move constructors ([class.copy.ctor]), copy assignment operators, move assignment operators ([c...
Wrapper asked 9/2, 2024 at 13:13
5
Solved
How can I declare a class type, so that I ensure the object is a constructor of a general class?
In the following example, I want to know which type should I give to AnimalClass so that it could ...
Victual asked 21/9, 2016 at 10:43
5
I was wondering, why I cannot call a constructor. Even this small example fails to compile with the message:
Klassentest.cpp:24:27: error: cannot call constructor 'Sampleclass::Sampleclass' direc...
Neri asked 4/12, 2015 at 9:41
17
Solved
I have a project where I'm trying to populate some data in a constructor:
public class ViewModel
{
public ObservableCollection<TData> Data { get; set; }
async public ViewModel()
{
Data ...
Monadism asked 16/11, 2011 at 1:19
15
Solved
Summary: I would like to call an asynchronous method in a constructor. Is this possible?
Details: I have a method called getwritings() that parses JSON data. Everything works fine if I just call g...
Confluence asked 13/4, 2014 at 20:49
6
Solved
I have a class which has not default constructor. And I need a way to get 'blank' instance of this class. 'blank' means that after instantiation all class fields should has default values
like null...
Beverie asked 9/11, 2010 at 12:37
7
I split up my class constructor by letting it call multiple functions, like this:
class Wizard:
def __init__(self, argv):
self.parse_arguments(argv)
self.wave_wand() # declaration omitted
def...
Malenamalet asked 10/10, 2013 at 0:4
6
Solved
Suppose I have the following (simplified case):
class Color;
class IColor
{
public:
virtual Color getValue(const float u, const float v) const = 0;
};
class Color : public IColor
{
public:
fl...
Plainsong asked 28/9, 2009 at 14:8
2
Solved
I created the following class:
export class MyItem {
public name: string;
public surname: string;
public category: string;
public address: string;
constructor();
constructor(name:string, su...
Sheepshead asked 9/9, 2016 at 8:39
10
Solved
Can I call constructor explicitly, without using new, if I already have a memory for object?
class Object1{
char *str;
public:
Object1(char*str1){
str=strdup(str1);
puts("ctor");
puts(str);
...
Rachaba asked 22/3, 2010 at 17:44
2
Solved
I recently came across some weird looking class that had three constructors:
class Class
{
public:
explicit Class(int );
Class(AnotherClass );
explicit Class(YetAnotherClass, AnotherClass );...
Ree asked 13/7, 2009 at 10:20
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