Category "constructor"

How to pass a function through the constructor of a class?

I would like to pass a function through the constructor of a class. but when i call it, nothing happening. debug write: func : {_Closure} import 'package:flutt

Passing constructor as a parameter to a method

I am new to java and started working on constructors. I am seeing few examples where constructor is passed as parameter to a Method. Please tell me what happens

error: type ‘class’ is not a direct base of ‘class’

I haven't been able to find an answer that relates specifically to my question. It's a bit of a "strange" case in terms of what I've seen. So I have a class C

What is the best practice to construct a Domain Object depending on external calls?

I am trying to build an object that gets its data from external APIs. I will try to explain it with an example: First of all, I get a POST body in my API to cre

Should I initialise an Angular service in its constructor or in the ngOnInit method of the app.component?

I'm new to Angular. I have a service that needs to subscribe to a subject provided by another service. If this was a component, I would create the subscription

"ReferenceError: Must call super..." when passing raw JSX arg to super in derived class

Trying to run the following in a React app gives the ReferenceError (below). Why? I'm calling super(). Is the JSX somehow "accessing 'this'"? class Base { con

how to run multiple defs () - Python MAYA?

I am following a Python for Maya tutorial from: https://github.com/gyassa4/MayaPyth/blob/master/gear_builder.py After I run the code it only run first def() whi

Is there still a need to provide default constructors to use STL containers?

I remember that back in C++98, if you wanted to make an STL container of MyClass, you needed to provide default constructor to MyClass. Was this specific to som

Error: Try adding an initializer expression, or add a field initializer in this constructor, or mark it 'late'

void main() { Car c1 = new Car('E1001'); } class Car { String engine; Car(String engine) { this.engine = engine; print("The engine is : ${engine}

Having trouble creating overloaded constructor, instantiating an object

I'm new with Java and I'm having trouble going along with my teacher's video lectures (I'm taking an online class), and I'm having trouble with this assignment:

Does a constructor has a "type" in C++ since it is a special member function

I recently learnt that constructors do not have names in C++ and some other things about them. I am also aware that a function has a type in C++ called a functi

Pass Parameter to Base Class Constructor while creating Derived class Object

Consider two classes A and B class A { public: A(int); ~A(); }; class B : public A { public: B(int); ~B(); }; int main() { A* aobj; B

Initialize field before super constructor runs?

In Java, is there any way to initialize a field before the super constructor runs? Even the ugliest hacks I can come up with are rejected by the compiler: cla

Laravel: Why is my variable not being set while it's in the construct function of the controller?

class Controller extends BaseController { use AuthorizesRequests, AuthorizesResources, DispatchesJobs, ValidatesRequests; private $host; private

How to create constructor of custom view with Kotlin

I'm trying to use Kotlin in my Android project. I need to create custom view class. Each custom view has two important constructors: public class MyView extend

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