A special type of subroutine called at the creation of an object.
20
votes
10answers
4k views
Verifying a person's age
When coding I noticed I started to get into a habit of not using if-else statements when the else block only has one line of code. For example, if I have code that can be solved like this:
...
0
votes
1answer
35 views
3
votes
3answers
66 views
Constructor for a Time object
I am trying to write a constructor method that takes dd, hh, mm and ...
4
votes
1answer
97 views
JSON loader with event bus, cache, and session
I have an Android application which needs to retrieve JSON files from a server and then display the information in my app. To accomplish this I have the following architecture:
The main activity adds ...
1
vote
1answer
47 views
Multiway Ruby conditional
I'm a little unhappy with the look of this "flexible" way of dealing with errors from an API in Ruby:
...
7
votes
1answer
133 views
Primitive Type Wrapper in C++
In C++, primitive types are treated differently than user-defined types. If you do not initialize them, their values are undefined in some cases. This is an easy mistake to make.
I wanted to make a ...
4
votes
1answer
79 views
Class decorator in Python to set variables for the constructor
I personally don't like the boilerplate of most __init__ methods:
self.a = a
self.b = b
...
So I thought this would be a nice ...
3
votes
0answers
66 views
2d game enemy entities factories, probably in need of refactoring
So I'm making a 2d shoot'em up game as a way of learning canvas, and larger-scale programming than what I'm accustomed to. I'm a purely front-end web dev, I can't say I'm very experienced in this.
...
2
votes
1answer
76 views
Inheritance and small number of parameters
Uncle Bob in his Clean Code says:
So all the same rules apply. Functions that take variable arguments
can be monads, dyads, or even triads. But it would be a mistake to
give them more arguments ...
2
votes
1answer
92 views
Java member method initialization pattern
To avoid the overridable method call in constructor dilemma this approache delegate the variables initialization and calls to overridable methods to a member method that return reference to the ...
1
vote
0answers
31 views
4
votes
1answer
85 views
Python 3 class constructor
I have implemented a metaclass in Python 3 that, apart from the usual instance constructor (i.e. __init__), enables you to define a class constructor (as a class ...
0
votes
1answer
110 views
C++ lazy constructor
I'm implementing a lazy constructor in C++. The goal is that for a type T, lazy<T>(args...) returns a callable object ...
2
votes
1answer
102 views
C# data class with public auto-implemented properties with constructor that specifies each
I have a dll and an executable which both deal in configuring certain things for a much broader software solution, and the code below in particular is directly meant for database configuration. (Here ...
3
votes
2answers
58 views
A PHP MVC controller to display a form and add an item to the database
I am creating a controller that will display a form and once the form has been submitted to store the item in the database. After the item has been stored the user will be redirected back to the main ...
2
votes
1answer
161 views
Emulating constructor overloading in Typescript
I'm writing a Matrix class, and I want to be able to construct a Matrix in two ways:
Supply a 2D array that the Matrix can use internally
Supply the dimensions of the Matrix, and the value to fill ...
5
votes
3answers
623 views
Parsing a complex number using regular expressions
Requirements were to create a constructor for a complex number, that receives a string. For example: \$3+5i\$. The regex extracts positive or negative numbers from the string with optional decimal.
...
1
vote
1answer
48 views
Establishing parameters for a sales report, with default boolean and date values
The idea is that I am getting the params from a GET request in the form of a Hash (symbol→str) and I want to transform them into dates and booleans. For that reason,...
3
votes
3answers
213 views
Dynamic class instancing (with conditional parameters and methods) based on a dictionary
In an RPG game I'm developing, after building a base Weapon class, instead of having many subclasses of Weapon, I want the ...
15
votes
6answers
2k views
Constructors for a class to represent a price in € or $
I'm using a method to make initialize the attributes of my objects, and this method is called from both constructor.
What it does is, if no correct currency has been passed, choose € by default.
I'm ...
3
votes
2answers
192 views
Follow up - Creating Inheritance hierarchy using function constructor
In continuation with this question,
Animal class has four fields:
name
sound
<...
8
votes
1answer
131 views
Creating Inheritance hierarchy using function constructor
Problem statement
You need to create the Animal base class having four fields:
a. name
b. ...
10
votes
1answer
95 views
A classy wine collection - Construction vs. Initialization
The following is for a chapter exercise in C++ Primer Plus, 6/e by Stephen Prata, for the first part of Chapter 14 which deals with code reuse through composition. The problem is to implement a ...
1
vote
2answers
92 views
Reducing code complexity for UsergridClient constructor
I'm initializing a class in JavaScript with a bunch of complex property checks. Codacy is showing that this is bad design and recommends reducing cyclomatic complexity.
I'm at a loss for how to ...
3
votes
2answers
446 views
Dynamically creating elements with an object constructor
Just experimenting with various Javascript techniques and was wondering if the code below is valid and if there are any disadvantages to using this technique to create html tags from JS object ...
5
votes
6answers
190 views
__repr__ for a binary tree whose constructor has default arguments
I recently have been working on a BinaryTree class, and looked into creating a proper __repr__ which when eval'ed would recreate ...
3
votes
1answer
94 views
Constructing NewsArticle objects from a database table
This class seems to be able to represent the data stored in any possible database table:
...
8
votes
2answers
405 views
Declaration of bloatedness: the class that knew too much?
I've already expressed concerns about this type's constructor, and I've sort-of* implemented the changes suggested in the answers I got there.
Recently I added even more parameters to that ...
2
votes
1answer
36 views
In a Content Pane mouse movements are logged and shown
I was trying to learn to develop plug-ins in Eclipse and after following the tutorial provided with Eclipse, tried to expand the code by writing a short Java class to track and display mouse movements ...
0
votes
1answer
84 views
YUIDoc syntax for optionally static constructor
In JavaScript, I wrote a class that can be optionally instantiated with the new keyword, but can also be called statically as well. What is the best way to ...
-3
votes
2answers
243 views
Is the Copy-Swap Idiom implemented here correctly? [closed]
Is the Copy-Swap Idiom implemented here correctly?
...
0
votes
1answer
406 views
Rule of 5 - C++11 [closed]
Source/Context:
What is the copy-and-swap idiom?
Rule-of-Three becomes Rule-of-Five with C++11?
The C++ Programming Language 4th Edition June 2013 -
Section 17.1 Introduction 483
...
2
votes
1answer
101 views
Book constructor pattern
I am learning how to do object-orientated programming in JS. In particular, I am learning about the constructor pattern.
In an attempt to exercise what I have been learning, I made this:
...
7
votes
4answers
7k views
Kelvin-Fahrenheit-Celsius temperature converter
I am curious if it would ever be in good practice to omit constructor definitions from a class. Here, the intention of the Temperature class is to simply convert between one temperature scale to ...
4
votes
2answers
520 views
Store open days and times
Currently I'm developing my business entities. I feel that the structure is a tad cumbersome.
What I mean is that a store on a particular day can have different open and closing times. So it's not ...
1
vote
2answers
675 views
Utility class for an HttpURLConnection
I am creating a utility class to do an HttpURLConnection. I want to make this class generic as in I pass the URL and the POST params. It works with any range of ...
1
vote
1answer
3k views
A binary tree , its copy constructor and assignment operator
I implemented a binary tree in the following code. Its node's copy constructor and assignment operator should copy itself and all its descendents. Similarity a node's destructor should delete itself ...
3
votes
1answer
491 views
Making a copy constructor more flexible for ADT queue
I have constructed a copy constructor for an ADT queue. The copy constructor works fine. I would want to improve my code, but I don't really know how to shorten it to make it more flexible.
...
2
votes
4answers
438 views
Rule Of Three for a Coordinate class [closed]
I just recently got back into C++ and did a quick and simple exercise in the Rule of Three. The code for the copy constructor, overloaded assignment operator, and destructor follows below for my class ...
2
votes
1answer
53 views
Elegant way of processing an “options” parameter
In this constructor function I'm assigning everything to the proper variables. For the third parameter it accepts an options argument that contains the optional ...
3
votes
1answer
185 views
Instantiating a kind of NumPy array
I am creating a class object which must inherit from numpy ndarrays. I perform an isinstance check and an ...
6
votes
1answer
828 views
Applying the copy-swap idiom to humans and employees
I came across this post which explains the copy and swap idiom. However I could not find this idiom applied to classes that have base classes. Following is my attempt of a copy-swap idiom applied to ...
9
votes
1answer
102 views
Class that represents starting points and endpoints of a game
I am creating my first HTML5 game using JavaScript and Phaser framework. I have a class (or more accurately a prototype) called MajorPoint that represents the ...
2
votes
3answers
171 views
ADT for a TVM calculator
I wanted to get some criticism for the below ADT. This is just a basic ADT that will be fed into a TVM calculator. Main purpose is to have it initialized and correct for input errors.
Full disclosure:...
1
vote
1answer
103 views
1
vote
3answers
85 views
Initializing object by settings implemented as a class [closed]
Here is the story.
We have the BankTerminalSettings class.
It has many properties:
...
2
votes
0answers
169 views
handle drag and drop operations
I've come up with the following code to handle drag and drop operation. It's composed of a constructor function that returns an objects with methods to attach to event handlers.
Notes about this ...
1
vote
1answer
533 views
Prompting the user for employment information
I have created a simple program in which the user is prompted for various details about their employment. In my Employee.java file, I have all the methods.
Employee.java:
...
6
votes
2answers
152 views
File class and large constructor
I have some dispute with a colleague. I work with some REST-service, from which I get always same type data.
...
3
votes
3answers
324 views
Triggering editing mode for a form
I think that my code isn't perfect and I need a help to understand how to optimize it.
In my application I have a main form and several forms for data editing.
The user can:
Add a new item
Edit ...
