Questions tagged [constructor]
A special type of subroutine called at the creation of an object.
140
questions
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1answer
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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.
...
0
votes
2answers
46 views
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 ...
4
votes
1answer
73 views
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) ...
2
votes
1answer
36 views
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 ...
0
votes
2answers
67 views
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 ...
4
votes
1answer
333 views
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 ...
-1
votes
1answer
115 views
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 ...
4
votes
1answer
119 views
Randomizing all class variables in constructor c++
I'm playing around with making random items and decided to implement the following structure.
...
1
vote
1answer
46 views
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?
...
0
votes
2answers
272 views
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 (...
1
vote
2answers
118 views
Particle Swarm Optimization algorithm
This is part of a Particle Swarm Optimization algorithm, a snippet of a Particle class implementation.
...
0
votes
3answers
98 views
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, ...
2
votes
0answers
92 views
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:
<...
1
vote
1answer
153 views
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 ...
1
vote
1answer
31 views
4
votes
1answer
41 views
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 ...
4
votes
1answer
73 views
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 ...
2
votes
1answer
47 views
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 ...
4
votes
2answers
1k views
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 ...
3
votes
2answers
120 views
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 ...
0
votes
3answers
66 views
Represent a Class which holds translation Strings [closed]
I have a class which represents some translations of a keyword.
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5
votes
2answers
302 views
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 ...
3
votes
1answer
473 views
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 (...
3
votes
1answer
253 views
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# ...
0
votes
2answers
654 views
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 ...
-1
votes
2answers
1k views
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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votes
2answers
72 views
Healthy Characters
Let's say I have an abstract class Character that have fields health and maxHealth. maxHealth...
3
votes
1answer
91 views
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 ...
4
votes
1answer
123 views
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 ...
1
vote
4answers
148 views
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 ...
1
vote
2answers
474 views
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 ...
1
vote
1answer
4k views
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 ...
3
votes
1answer
891 views
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 ...
3
votes
4answers
116 views
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 ...
0
votes
2answers
131 views
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.
<...
2
votes
2answers
506 views
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:
...
5
votes
2answers
291 views
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 ...
0
votes
1answer
2k views
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 ...
0
votes
1answer
135 views
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 ...
3
votes
3answers
3k views
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
...
2
votes
1answer
2k views
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 ...
5
votes
1answer
1k views
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 ...
5
votes
1answer
2k views
Counting the number of unique fractions read from a text file
I will begin this question with the disclaimer that it is homework but my code is written and working, I just want to know if there any ways in which I can improve what I already have. I want my ...
2
votes
3answers
115 views
Message class, with constructors for data from user and from database
I'm fairly new to Kotlin, and am looking to slim down a data class.
It has two constructors, one for creation based on user input, and one for creation based on database data.
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0
votes
2answers
62 views
Stateful User tracking
I have a class that takes a string or an integer, which stand for username or user id in the database. I am not comfortable with my constructor taking "a string or an integer" and want to modify it ...
2
votes
1answer
41 views
Validating inputs in the constructor [closed]
Let's take the following example. Even if the number of parameters is acceptable, I find that the code block is too long.
Are these validations at the right place? Is there a better approach in such ...
13
votes
3answers
2k views
Immutable Object class in VBA – Creatable only through constructor and not via “New” keyword
Goals for the class
Create Immutable objects – i.e. only Getters – no Setters
Object creation only possible through a constructor, not via New keyword, to ensure ...
1
vote
1answer
46 views
1
vote
1answer
27 views
Class for Stripe transactions
I just wonder whether it is a common approach to hit the third-party API and fetch values within the initialize method?
Ex.
...
2
votes
0answers
649 views
OpenGL Shape class constructor
I'm coding a wrapper for OpenGL 3.3, and I have some questions about the design of my Shape class. To be short, It's a class that englobes a VBO, a VAO, and an EBO ...
