All Constructor Solutions on Gang of Coders

Total of 270 Constructor Solutions

How does Python's "super" do the right thing?

Python Constructor Multiple Inheritance Super Python 2.5

Is there any reason to choose new over init when defining a metaclass?

Python Constructor New Operator Metaclass Init

How to chain method on a newly created object?

Php Constructor New Operator Method Chaining

Closing a form during a constructor

C#Winforms Constructor

Is generic constructor in non-generic class supported?

C#Generics Constructor

Why use an initialization method instead of a constructor?

C++Constructor Initialization

Can I call methods in constructor in Java?

Java Constructor

Why doesn't Java have initializer lists like in C++?

Java C++Constructor Initialization Initialization List

In Ruby, what's the relationship between 'new' and 'initialize'? How to return nil while initializing?

Ruby Constructor Return New Operator Initializer

C++ - initializing variables in header vs with constructor

C++Constructor Initialization

How many constructors does the class have?

C++Oop Constructor

Static factory methods vs Instance (normal) constructors?

Design Patterns Constructor Coding Style

Purpose of PHP constructors

Php Class Oop Constructor

Base Class Doesn't Contain Parameterless Constructor?

Javascript: Mocking Constructor using Sinon

Javascript Unit Testing Constructor Mocking Sinon

Creating a named list from two vectors (names, values)

R List Constructor Lapply Named

In C#, do you need to call the base constructor?

C#Inheritance Constructor

extends of the class with private constructor

Java Constructor

How can I have an overloaded constructor call both the default constructor as well as an overload of the base constructor?

Why doesn't JavaScript ES6 support multi-constructor classes?

Javascript Class Constructor Ecmascript 6

Abstract constructor in C#

C#.Net Constructor Abstract Class

A most vexing parse error: constructor with no arguments

C++Constructor Standards

How to overload constructor of an Object in JS (Javascript)?

Javascript Constructor Overriding

C# - Making all derived classes call the base class constructor

C#Inheritance Constructor

Setter methods or constructors

Java Constructor Setter

What is Array.apply actually doing

Javascript Arrays Constructor

Throwing ArgumentNullException in constructor?

C#Exception Constructor Null Arguments

How to initialize member-struct in initializer list of C++ class?

C++List Constructor Struct Initializer

init as a constructor?

Python Constructor Initialization

Can I initialize an STL vector with 10 of the same integer in an initializer list?

C++Stl Constructor Initializer List

Who deletes the memory allocated during a "new" operation which has exception in constructor?

C++Exception Memory Leaks Constructor

call to pure virtual function from base class constructor

C++Constructor Abstract Class Object Lifetime Pure Virtual

Asynchronous constructor

Javascript node.js Asynchronous Constructor

Chain-calling parent initialisers in python

Python Oop Inheritance Constructor

Get argument types for function / class constructor

Typescript Types Constructor

Initialize multiple constant class members using one function call C++

C++Oop Constructor Constants Initializer List

How much work should be done in a constructor?

Oop Constructor

Calling Overridden Constructor and Base Constructor in C#

PHP constructor to return a NULL

Php Constructor Error Handling Null

How do I create a C# array using Reflection and only type info?

C#Arrays Reflection Constructor

Returning a value in constructor function of a class

Php Oop Class Constructor

scala class constructor parameters

Scala Constructor Scope Immutability

Inheriting constructors

C++Inheritance Gcc Constructor

Is it not possible to define multiple constructors in Python?

Python Constructor

What is the reason to use the 'new' keyword at Derived.prototype = new Base

Javascript Constructor Prototype

C# inheritance and default constructors

C#Oop Constructor

Why do we not have a virtual constructor in C++?

C++Constructor Virtual Functions

Call one constructor from another

difference between variables inside and outside of init()

Python Class Oop Constructor

Calling virtual functions inside constructors

C++Constructor Overriding Virtual Functions

Spring @Autowire on Properties vs Constructor

Spring Dependency Injection Constructor Autowired

Constructors in Go

Oop Constructor Go

Can I use Class.newInstance() with constructor arguments?

Java Constructor

How do I get a PHP class constructor to call its parent's parent's constructor?

Php Class Oop Inheritance Constructor

Do the parentheses after the type name make a difference with new?

C++Constructor Initialization New Operator C++ Faq

Can I call a constructor from another constructor (do constructor chaining) in C++?

How to do constructor chaining in C#

C#Constructor Constructor Chaining

ReactJS: Warning: setState(...): Cannot update during an existing state transition

Reactjs Constructor Setstate

Should I instantiate instance variables on declaration or in the constructor?

Java Constructor Instance Variables

Call asynchronous method in constructor?

C#Windows Phone-8 Constructor Visual Studio-2013 Async Await

When is it right for a constructor to throw an exception?

Exception Language Agnostic Constructor

Can a constructor in Java be private?

Java Constructor Private

Constructor of an abstract class in C#

C#Constructor Abstract Class

Can constructors throw exceptions in Java?

Java Exception Constructor

Accessing constructor of an anonymous class

Java Constructor Overloading Anonymous Types

Can I call an overloaded constructor from another constructor of the same class in C#?

Default constructor with empty brackets

C++Constructor Default Constructor C++ Faq Most Vexing-Parse

What is the function __construct used for?

Php Constructor

Java Constructor Inheritance

Java Inheritance Constructor

Instance attribute attribute_name defined outside init

Python Constructor Pylint

How does interfaces with construct signatures work?

Typescript Constructor Interface

What does the explicit keyword mean?

C++Constructor Explicit C++ Faq Explicit Constructor

What is a clean "pythonic" way to implement multiple constructors?

Python Class Constructor

How to initialize HashSet values by construction?

Java Collections Constructor Initialization Hashset

Is it good practice to make the constructor throw an exception?

Java Exception Constructor

What's the difference between an object initializer and a constructor?

C#.Net Constructor Object Initializer

How to inherit constructors?

C#Inheritance Constructor

Does the default constructor initialize built-in types?

C++Constructor Initialization Default Constructor Built in-Types

Is there a generic constructor with parameter constraint in C#?

C#Generics Parameters Constructor Generic Constraints

How does the const constructor actually work?

Dart Constructor

Is it better to use Enumerable.Empty<T>() as opposed to new List<T>() to initialize an IEnumerable<T>?

C#Linq Constructor

Is it bad practice to have a constructor function return a Promise?

Javascript node.js Architecture Constructor Promise

What are the rules for calling the base class constructor?

C++Inheritance Constructor

Is it unnecessary to put super() in constructor?

Java Constructor Super

Why can't the C# constructor infer type?

C#Generics Constructor Type Inference

Java default constructor

Java Constructor Default Constructor

typeof for RegExp

Javascript Regex Constructor Instanceof Typeof

Code snippet or shortcut to create a constructor in Visual Studio

C#Visual Studio Constructor Code Snippets Shortcut

Understanding prototypal inheritance in JavaScript

Javascript Oop Inheritance Constructor Prototype Programming

How many constructor arguments is too many?

Parameters Refactoring Constructor Coding Style

Can an abstract class have a constructor?

Java Constructor Abstract Class

What is the difference between using constructor vs getInitialState in React / React Native?

Reactjs React Native Constructor

C# constructor execution order

C#Inheritance Constructor Constructor Chaining

Python constructor and default value

Python Constructor Default Value

How do I call one constructor from another in Java?

Java Constructor

Why do this() and super() have to be the first statement in a constructor?

Java Constructor

Default constructor vs. inline field initialization

Java Oop Constructor

Calling constructor from other constructor in same class

Initialize parent's protected members with initialization list (C++)

C++Inheritance Constructor Initialization List

C# static class constructor

C#Class Static Constructor

C# Error: Parent does not contain a constructor that takes 0 arguments

C#Inheritance Constructor Compiler Errors

Kotlin secondary constructor

Syntax Constructor Kotlin

Is a `=default` move constructor equivalent to a member-wise move constructor?

C++C++11 Constructor Default Move Semantics

Is there a way to @Autowire a bean that requires constructor arguments?

Spring Constructor Autowired Spring Annotations Spring Bean

How to call Base Class's init method from the child class?

Python Python 2.7 Inheritance Constructor

Why should the copy constructor accept its parameter by reference in C++?

C++Constructor Copy Copy Constructor

C++ template constructor

C++Templates Constructor

Default parameters with C++ constructors

C++Constructor Coding Style Overloading

Java Lombok: Omitting one field in @AllArgsConstructor?

Java Syntax Constructor Field Lombok

Understanding Factory constructor code example - Dart

Constructor Dart

What do constructor type arguments mean when placed before the type?

Java Generics Syntax Constructor Generic Type-Argument

Interface defining a constructor signature?

C#Interface Constructor

Javascript "Not a Constructor" Exception while creating objects

Javascript Object Constructor Typeerror

Creating an object: with or without `new`

C++Constructor New Operator Destructor

How do I call a super constructor in Dart?

Inheritance Constructor Dart Superclass Extends

Will the base class constructor be automatically called?

C#Constructor Base Class

Hide Utility Class Constructor : Utility classes should not have a public or default constructor

Java Constructor Sonarqube

async constructor functions in TypeScript?

Constructor Typescript Async Await

How do I initialize a final class property in a constructor?

Constructor Dart Final

Automapper - how to map to constructor parameters instead of property setters

Constructor Automapper

What is an initialization block?

Java Constructor Initialization Initialization Block

Creating an instance of class

C++Class Constructor

What is the significance of the Javascript constructor property?

Javascript Prototype Constructor

What is the best way to give a C# auto-property an initial value?

C#Constructor Getter Setter Automatic Properties

Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)

C#.Net Oop Dependency Injection Constructor

How to detect if a function is called as constructor?

Javascript Constructor

Why can't I overload constructors in PHP?

Php Oop Overloading Constructor

Inheritance with base class constructor with parameters

C#Inheritance Constructor

Constructor overloading in Java - best practice

Java Constructor Overloading Constructor Overloading

Is passing a C++ object into its own constructor legal?

C++Class Constructor Language Lawyer Undefined Behavior

What is difference between instantiating an object using new vs. without

C++Constructor New Operator

Dual emission of constructor symbols

C++Gcc Constructor

C# : assign data to properties via constructor vs. instantiating

C#Oop Constructor Properties

Overload constructor for Scala's Case Classes?

Scala Constructor Overloading Scala 2.8 Case Class

How to start an Intent by passing some parameters to it?

Android Constructor Android Intent

How do I check if a type provides a parameterless constructor?

C#.Net Reflection Constructor Types

Horrendous performance & large heap footprint of Java 8 constructor reference?

Java Constructor Java 8 Out of-Memory Method Reference

Struct constructor: "fields must be fully assigned before control is returned to the caller."

C#Constructor Struct

Constructor overload in TypeScript

Typescript Constructor Overloading

Class constructor type in typescript?

Class Typescript Types Constructor

Use of Initializers vs Constructors in Java

Java Constructor Initializer Static Initializer Initialization Block

Copy constructor in python?

Python Constructor Copy

'UserControl' constructor with parameters in C#

C#Winforms Parameters Constructor User Controls

Using C# reflection to call a constructor

C#Reflection Constructor

Static class initializer in PHP

Php Class Static Constructor Initializer

How can I initialize C++ object member variables in the constructor?

C++Constructor Class Members Object Construction

What are practical uses of a protected constructor?

C++Constructor Protected

Colon after Constructor in dart

Constructor Dart Flutter

How to use base class's constructors and assignment operator in C++?

C++Inheritance Constructor Assignment Operator

C# member variable initialization; best practice?

C#Constructor Declaration

What does a colon following a C++ constructor name do?

C++Constructor Initialization List Ctor Initializer

C++: Where to initialize variables in constructor

C++Constructor Initialization

Why is Class.newInstance() "evil"?

Java Constructor Runtime Instantiation

DataContractSerializer doesn't call my constructor?

C#.Net Constructor Serialization Datacontractserializer

base() and this() constructors best practices

C#Oop Inheritance Constructor Instantiation

ES6: call class constructor without new keyword

Javascript Constructor Ecmascript 6 Instance

When do you need to explicitly call a superclass constructor?

Java Constructor Subclass Superclass

In what order do static blocks and initialization blocks execute when using inheritance?

Java Inheritance Constructor Static Block

Use of .apply() with 'new' operator. Is this possible?

Javascript Oop Class Inheritance Constructor

Why do constructors not return values?

How to invoke the super constructor in Python?

Python Class Inheritance Constructor Superclass

Angular 2 Component Constructor Vs OnInit

Angular Constructor Ngoninit

What is the difference between init block and constructor in kotlin?

Kotlin Constructor Initialization Block

Private Constructor in Python

Python Static Constructor Private

Calling an async method from component constructor in Dart

Asynchronous Constructor Dart

Default member values best practice

C++Constructor C++11 Header Files Default Value

Is it important to unit test a constructor?

C#.Net Unit Testing Constructor

Pass arguments to Constructor in VBA

Vba Class Oop Constructor Factory

Struct Constructor in C++?

C++Struct Constructor

What does calling super() in a React constructor do?

Javascript Reactjs Constructor Ecmascript 6

What values can a constructor return to avoid returning this?

Javascript Constructor New Operator

JUnit: using constructor instead of @Before

Constructor Junit Initialization

Best way to handle multiple constructors in Java

Java Constructor Field

Instantiate a class object with constructor that accepts a string parameter?

Java Html Reflection Constructor

Initialize a static final field in the constructor

Java Static Constructor Final

Leaking this in constructor warning

Java Netbeans Constructor This Netbeans 6.9

How do I call the base class constructor?

Is it possible to create constructor-extension-method ? how?

C#Constructor Extension Methods

Why can't constructors be final, static, or abstract?

Java Syntax Constructor

What destructors are run when the constructor throws an exception?

C++Constructor Exception Handling Destructor

Object array initialization without default constructor

C++Arrays Constructor

Has the new C++11 member initialization feature at declaration made initialization lists obsolete?

C++C++11 Constructor Initialization Declaration

How to extend a class that has multiple constructors in Kotlin?

Constructor Kotlin

Private constructor in Kotlin

Java Constructor Kotlin Visibility

In C++ can constructor and destructor be inline functions?

C++Constructor Destructor

How can I access a private constructor of a class?

Java Oop Constructor Instance

Cannot reference "X" before supertype constructor has been called, where x is a final variable

Java Constructor Final Supertype

When is a custom attribute's constructor run?

C#.Net vb.net Constructor Attributes

Java constructor style: check parameters aren't null

Java Constructor Null Coding Style

Why can't enum constructors be protected or public in Java?

Java Enums Constructor

Java: accessing private constructor with type parameters

Java Reflection Constructor Private

Is the default Move constructor defined as noexcept?

C++C++11 Constructor Move Semantics

Calling a constructor to re-initialize object

C++ Abstract Class: constructor yes or no?

C++Class Constructor Abstract

What is a non-trivial constructor in C++?

How to initialize a const field in constructor?

C++Constructor Constants Ctor Initializer

Should constructors comply with the Liskov Substitution Principle?

Constructor Class Method Liskov Substitution-Principle

Are fields initialized before constructor code is run in Java?

Java Constructor Initialization

Will an 'empty' constructor or destructor do the same thing as the generated one?

C++Class Oop Constructor Destructor

Calling the base constructor in C#

C#.Net Inheritance Constructor

Can constructors be async?

C#Constructor Async Await

What is this weird colon-member (" : ") syntax in the constructor?

C++Syntax Constructor C++ Faq Ctor Initializer

Can constructor return a null object?

Java Constructor Null

How to set @Autowired constructor params as "required=false" individually

Spring Spring Boot Constructor Autowired

What's wrong with overridable method calls in constructors?

Java Oop Inheritance Constructor Overriding

Is there a way to instantiate a class without calling init?

Python Class Constructor Instantiation

How to overload init method based on argument type?

Python Constructor Operator Overloading

Can I use identical names for fields and constructor parameters?

C++Parameters Constructor

Python: Inherit the superclass init

Python Inheritance Constructor Init

Using "Object.create" instead of "new"

Javascript Constructor New Operator Object Create

Conversion constructor vs. conversion operator: precedence

C++Constructor Operators Type Conversion Conversion Operator

Is doing a lot in constructors bad?

Java Constructor

Best way to do multiple constructors in PHP

Php Constructor Multiple Constructors

C++ Constructor/Destructor inheritance

C++Inheritance Constructor Destructor

Do you use TestInitialize or the test class constructor to prepare each test? and why?

.Net Unit Testing Constructor

C# constructors overloading

C#Constructor Constructor Overloading

C++: constructor initializer for arrays

C++Constructor Initializer

Why won't this compile without a default constructor?

C++Constructor Scope Default Constructor Most Vexing-Parse

__construct() vs SameAsClassName() for constructor in PHP

Php Constructor

Why must const members be initialized in the constructor initializer rather than in its body?

C++Constructor Initialization Constants

How can I force a Constructor to be defined in all subclass of my abstract class

Java Constructor Abstract

Using C++ base class constructors?

C++Inheritance Constructor C++11

Can Kotlin data class have more than one constructor?

Constructor Kotlin

Why can't Java constructors be synchronized?

Java Constructor Language Design Synchronized

Serialize JavaScript object into JSON string

Javascript Json Constructor

What is the difference between getDeclaredConstructors and getConstructors in the Class API?

Java Reflection Constructor

Why do C++ objects have a default destructor?

C++Constructor Destructor Default Constructor

What is constructor inheritance?

C++Inheritance Constructor C++11

How to call the constructor with call_user_func_array in PHP

Php Constructor

What is the use of static constructors?

C#Constructor Static Constructor

Destructors of builtin types (int, char etc..)

C++Constructor Destructor Typedef

Why do abstract classes in Java have constructors?

Java Constructor Abstract Class

How to force deletion of a python object?

Python Constructor Garbage Collection Destructor Reference Counting

a constructor as a delegate - is it possible in C#?

C#Delegates Constructor

How to create constructor of custom view with Kotlin

Android Constructor Kotlin

Why can't I create an abstract constructor on an abstract C# class?

C#Inheritance Oop Constructor Abstract Class

Is there an implicit default constructor in C++?

Rule-of-Three becomes Rule-of-Five with C++11?

C++Constructor C++11 Rvalue Reference Rule of-Three

Multiple constructors: the Pythonic way?

Python Constructor Initialization Initializer Idioms

How to make the class constructor private in Ruby?

Ruby Constructor Access Specifier

Virtual member call in a constructor

C#Constructor Warnings Resharper Virtual Functions

Sending reference of object before its construction

C#Reference Constructor

Constructor vs Object Initializer Precedence in C#

C#Constructor Object Initializers

Data Constructor promotion in GHC-7.6

Haskell Constructor Ghc

How do I call New-Object for a constructor which takes a single array parameter?

Arrays Powershell Parameters Constructor

Default constructors in Java

Java Inheritance Constructor

Changed rules for protected constructors in C++17?

C++Constructor Language Lawyer C++17 Protected

The copy constructor and assignment operator

C++Constructor Operators Copy Constructor Assignment Operator

Call one constructor from the body of another in C#

new Backbone.Model() vs Backbone.Model.extend()

Javascript backbone.js Constructor Instance

Infinite loop in constructor without for or while

C++Recursion Constructor Constants

Initializing a union with a non-trivial constructor

C++Constructor Multiplatform

What setup code should go in Form Constructors versus Form Load event?

C#Winforms Constructor Onload Event

In Scala, how can I subclass a Java class with multiple constructors?

Java Scala Constructor Multiple Constructors

What if I write return statement in constructor?

C++Constructor Return Value Return Return Type

PHP constructor with a parameter

Php Constructor

Select class constructor using enable_if

C++Templates Constructor Sfinae

Transfer NULL to the constructor

C#Constructor Overloading Constructor Overloading

C++ virtual function from constructor

C++Oop Class Constructor Virtual

Throwing exceptions from constructors

C++Exception Constructor Throw

What is a converting constructor in C++ ? What is it for?

C++Constructor Copy Constructor

What is the order in which the destructors and the constructors are called in C++

C++Constructor Destructor

C++, is it possible to call a constructor directly, without new?

C++Constructor Placement New

JavaScript: The Good Parts - How to not use `new` at all

Javascript Oop Constructor New Operator

When do we need a private constructor in C++?

C++Constructor Private

Defining an object without calling its constructor in C++

C++Class Object Constructor

Creating a Fragment: constructor vs newInstance()

Android Constructor Android Fragments Default Constructor

How many objects are created due to inheritance in java?

Java Object Constructor

undefined reference to 'vtable for class' constructor

C++Class Constructor

Do constructors always have to be public?

Java Oop Design Patterns Constructor Access Modifiers