Questions tagged [constructor]
A special type of subroutine called at the creation of an object.
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in_place_constructor helper type
recently I implemented a little helper class, which can be primarily utilized on perfect forwarding constructors.
Introduction
As a slight example, let me pull in two of the ...
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A simple String class and its special member functions
I am learning the behavior of C++'s special member function, using a naive String class as example. (The code is modified from this tutorial) Here is the ...
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Tiny Validity class
Here is a part of my new code replacing the old and deprecated old-school one.
Let's get to business right away:
I document everything with Documentation comments, which are proving very useful so ...
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Performing complex operation before calling the primary constructor in Kotlin
Semester is a simple enum class.
...
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GameObject - Component hierarchy, component can access game object in constructor
While creating a game engine using c++, when defining a component, I was tired of writing down essential but repeated elements such as 'GameObject* parent' every time I define a new component ...
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Setting instance variable for salary bonus based on academic position
I have a class Scholar which is basically a teacher in a university. I have to calculate the yearly salary of a scholar instance where the formula is ...
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If constructor has actions besides assignment should I move those actions in separate method?
I have class CellGroup that contains List of cell lists
That class has creation of list inside and transforming it to list of lists.
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Made a monster array for a text based game with a class constructor C++ [closed]
I created a class in a separate .h and .cpp file with the idea of having an array of 3 monsters with each monster having different stats( name; health; damage). The problem is that the constructor ...
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Commands Object creation using chained Builder pattern
Context
As many of you may know I have a library that allows C++ objects to be converted into JSON/YAML/BSON automatically with a single declaration (see previous code reviews).
I am now (trying) ...
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Clearing up property and field confusion in C#?
I understand that creating public properties that control private fields is good practice because of coupling and encapsulation, although lately I have seen it as such a waste of boilerplate code for ...
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Modify parameter data before creating an instance of a class in PHP
I have an abstract Badge class, every class extending this class should always correctly set the incoming name (string) and achievedAt (date) fields.
There might be other classes that extend the Badge ...
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Set id in constructor, or generate it when asked for?
I'm using PHP, I have a class that generates an id based on the calling class, so the id of the class won't change after it has been initialised, now I'm wondering which of my two methods is ...
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C++ wrapper class for array of OpenGL buffer objects -- just the constructors
A similar question was asked here, and I'm trying to do the same thing. But
I'm trying a different approach by deriving from std::array, and
This is a very focused ...
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Is performing IO in constructor good idea? [closed]
I have Java (or C#, Python, Kotlin, or other similar language) class that will be used to communicate with client over network. Protocol used by this application allows many different ways to create ...
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Randomizing all class variables in constructor c++
I'm playing around with making random items and decided to implement the following structure.
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Passing argument to a constructor and using it only in some class methods
I've created some controller for handling clicked links statistics. Does this class meet Single Responsibility Principle?
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2
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Array indexing with copy constructor, assignment operator and index operator overload
The code below is a custom array class that handles indexing, copying, printing, etc. explicitly.
Is there a better approach for specification (declaration and definition) of the assignment operator (...
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Particle Swarm Optimization algorithm
This is part of a Particle Swarm Optimization algorithm, a snippet of a Particle class implementation.
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3
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Minecraft city class [closed]
This is a class representing a city in a mod I am creating for Minecraft. All the constructor parameters are mandatory and they are used to help the class that calculates and builds the Paths, ...
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Convenient way to make an UIImageView ExpressibleByStringLiteral
I want to reduce boiler-plate code and write like this when developing in iOS:
let imgView: UIImageView = "share_fareware_text_bg"
Here is implementation code:
<...
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Constructor function for persons with hobbies
I'm trying to write a constructor function that generates instances of a user. One of the properties of the user class is an array of the user's hobbies. I'd like ...
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Adding Length dimension to a Crate Object
Consider Crate::addLength() in the following code:
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1
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Time interval class that enhances constructor argument handling of its parent class
I am making a subclass of a well-established python class: pendulum.Period, which overrides both __new__ and ...
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1
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Super fancy list constructing in Python
Out of curiosity I was discovering the potential of the Ellipsis object in Python (...), and I discovered it doesn't do a whole ...
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Constructor for a packagetarget struct
As many of you know goto is usually signs of code smell. However I thought this could be an appropriate case, and would like confirmation or criticism.
Unnecessary ...
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Implementing a c++ Kafka producer based on librdkafka
To practice my c++ I decided to implement a simple Kafka producer to wrap the producer in c in librdkafka library. I just want to get your opinion on the way I have implemented teh default, copy and ...
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Constructing a cumulative distribution function from a histogram
During some running process, a histogram of values shall be build up. When done, the CDF shall be derived from it and used to get the quantiles for some values.
My current implementation looks as ...
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Represent a Class which holds translation Strings [closed]
I have a class which represents some translations of a keyword.
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C++ wrapper class to mimic a C array's brace initialization
I have an inheritance class that mimics the behavior of C style array's brace initialization by using a class template that has a variadic constructor but the template itself is not a variadic ...
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C++ - Astar search algorithm using user defined class
The objective of the post is to improve design and improve command on C++. Given a map, start point and end point, the shortest path to end point from the start point has to be found out using Astar (...
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Load and update XML inside the constructor
My requirement is, I need to load the existing xml file from the given path by passing through command line arguments and need to update the xml file from C# code. First time I am working on the C# ...
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Fetching data from your database in a constructor
I have this item (an item is an object linked to a xml view), to build it I need 2 things, get labels from codes, and get text from the strings.xml android file.
please ignore the long to int and int ...
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Constructors with variable number of arguments [closed]
Assume that we have a class with multiple constructors which may look like the following:
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Healthy Characters
Let's say I have an abstract class Character that have fields health and maxHealth. maxHealth...
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Representing destinations in a square
I've written a program following the instructions of an exam paper. There are no solutions available so I would appreciate a feedback. I'm concerned with main in ...
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Designing the constructor interface for a reflection object (any class)
I am working on cleaning up and making open source a C++ reflection library that has served me well over the last few years.
One of the most important classes of the library is ...
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4
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Java Date class- switches and ifs in the constructor
I'm a beginner i have an assignment to write a Date class (as part of a bigger project). in my question i focus on the constructor. here's some background: the given guidelines are that the date is ...
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Class for course information
Here's what the question asks:
Build a class called Course.java. This class should have 4 properties: CourseId, CourseName, Description, and credit hours. Also add the appropriate set and get ...
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Testing async method call from constructor
I have a project where I want to build a more sophisticated ToDo list - basically a personal project management system. I'm just starting out with the project, and I'd like some feedback on whether my ...
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Character class with name, gender, and inventory list
I am trying to create a class to test my understanding, and it takes an ArrayList as parameter. The decision of choosing an ...
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Simple addition calculator accepting addition expressions
Maybe someone can help me to optimize the calculate method. I think that it can be simplified from that what I have now.
The objective is: grab a string via the ...
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Ensuring a non-zero radius when constructing a circle
Is there a little "better" way of writing the line:
raise RuntimeError if not radius.is_a? Numeric or radius == 0
I want to only allow numbers bigger than 0.
<...
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Elegant way to "construct" kind-of enum values in go
I'm quite new to Go and would like to improve my code. I have a representation for access levels in Go like this:
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Request dispatcher for PHP JSON web service
Below you can find the constructor method and related fields of the main class of my REST API (note that the class contains more code than displayed) written in PHP 7.1. It does various things with ...
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Initializing values of a singly linked list with a constructor [closed]
I have to create a constructor that allows a new linked list to be populated with ten consecutive values, starting at 0. Then I need to print the list! So i want to check if the functions I wrote for ...
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Controller with too many parameters with DI [closed]
Is there a way to reduce the number of parameters of this constructor?
All the services must be used in this Controller. The majority of them are used more than 2 times(some of them >10), with the ...
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answers
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OOP modelling of a car agency
Exercise:
A car dealer wants a computer system to manage the data of their vehicles and classify them by type.
All cars have the following data
Engine serial number
Brand
Year
...
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Factory using Structuremap to inject concrete implementation of BaseTask<T>
The problem statement that I am trying to solve is this;
We will retrieve a list of Tasks from an external repository. These tasks will have a type and for each type, there needs to be a specific ...
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Simple c++ triple class to mimic pair for use with uniform initialization
I'm trying to create a simple triplet class, but the more I look at the implementation of std::pair the more I feel like I'm missing important details. What I have ...
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