A special type of subroutine called at the creation of an object.

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3
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3answers
271 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 ...
5
votes
3answers
123 views

Parameterised Constructors

Finally, Parameterised Constructors are possible in VBA. Background: One rainy day, I came up with an idea: take a static class and expose one property as default (like it was done in the Reverse ...
7
votes
4answers
89 views

Avoid if/else in constructor - NavigableMap?

I have the following code, based on the input to the constructor I need to initialise some values which are wrapped in a simple POJO. These values are constant as you can see. However I don't like ...
4
votes
1answer
142 views

Dependency Injection into an Abstract Class

Me and another developer have recently forked and taken over an abandoned, open-source project. I have also been reading articles and watching videos by Misko Hevery. When I was reading through the ...
6
votes
3answers
384 views

Count PDF pages in constructor

I have an object that represents a PDF file. In the constructor, I pull out various information about the file name and make it available via properties: ...
7
votes
2answers
220 views

Should I set a license in the constructor or a static constructor?

We are using the Aspose PDF library to work with PDF files. Aspose requires the license to be set once per process. Accordingly, I have created the following common static method that sets the ...
4
votes
2answers
157 views

Exercising in copy constructors and assignment operators

I've just created an implementation of array to train myself in copy constructors, assignment operators, and exception safety. Please look at this code and tell me what is wrong here. ...
4
votes
1answer
52 views

Zip-like construction of objects from parameter collections

This little function can make object creation much easier. Sometimes you need to switch between representing your data as objects vs. having the members in separate containers. Example: ...
17
votes
5answers
765 views

When a constructor calls a helper function, should the helper mutate the object or return part of the object?

I have a private method that is called from the constructor to instantiate a bunch of objects. I can do it two ways. ...
6
votes
2answers
482 views

What is the advantage/disadvantage of using default initializer for private fields?

Let's compare the following code: 1) ...
7
votes
2answers
208 views

Long constructors, inheritance, class method constructors

My class takes functions as a parameter. There are 6 of them, along with numerous other parameters. Almost all of the fields have default values. It also has a class method that creates an instance ...
2
votes
0answers
124 views
1
vote
1answer
51 views

Framework constructor

I'm working on my framework constructor. First I tried to look into jQuery and understand it, but it's so out of my league. Instead I googled and put this code together. Though there aren't many posts ...
2
votes
2answers
62 views

Making this login javascript code more organized and more competent?

I have this basic javascript that using a constructor, validates the form where the login fields cant be empty. All this WITHOUT using any js libraries. So far I have come up with this... ...
1
vote
2answers
108 views

Improve testability of constructor

I have the following constructor ...
1
vote
3answers
142 views

Review of three constructors for a String class

I have the following declaration in my String.h file: private: char* nstring; int nlength; }; The following are three constructors I've implemented in ...
3
votes
4answers
134 views

Reference type and constructors [closed]

Code in Java but should be readable also for c#... Let's assume I have a class with some reference types. Example: ...
0
votes
1answer
128 views

Cleaning up PHP object constructors

I have this annoying problem in PHP with faking overloading constructors. I understand the concept, but the code I produce feels kind of ugly. It isn't a lot of code, just bad code. Any ideas on how ...
1
vote
2answers
75 views

Write a class with some properties and indexed

Is there a better way to write it? I need the best way to write it. It is this principle? Please show me a better way it breaks SRP? ...
1
vote
1answer
133 views

__constructor mysqli variable options

I like the fact that I can create a class and have the connection details in one file if I need to update them and then pass them to the method I create in the class that defines my specific use of ...
4
votes
2answers
165 views

Constructor Chaining in Java

When creating multiple constructors, I usually do the following; ...
1
vote
2answers
833 views

JavaFX design writes to static field from constructor

In JavaFX, the lifecycle of an Application is quite different than Swing. Your constructor must take no arguments so that the ...
3
votes
2answers
1k views

Is this a correct way to write a convenience constructor?

I was reading more about the instancetype on Stack Overflow and now my question is: For every convenience constructor that I write, do I need to have the ...
1
vote
1answer
102 views

Dynamic object creation in Python

I want to abstract away differences between zipfile and rarfile modules. In my code i want to call ZipFile or RarFile ...
1
vote
2answers
68 views

Changing the state of another entity into the constructor method

I have a Clock class who inherites from pyglet.clock.Clock and behaves like a Singleton. Into the constructor method I have the following line: ...
1
vote
1answer
155 views

Java constructor should use setter?

I have a simple Java model Class called Person which have a constructor that receives a JSONObject. In that constructor I get the values from the JSONObject and put in my instance variables. This is ...
2
votes
3answers
169 views

Logic for an init function in email parser

I am writing an email parser and cannot decide how much logic should be included in the __init__ function. I know that a constructor should make the object ready ...
0
votes
2answers
1k views

Constructor with too many arguments [closed]

We have a Transaction class that's very loaded; so loaded that I originally ended up passing almost 20 argument to the ctor. ...
5
votes
3answers
308 views

Calling functions (or invoking methods) in constructor

I had written something like the following, ...
3
votes
3answers
1k views

Self populating view models

So I have a view model (asp.net mcv 3 app) that when instantiated with a particular parameter, populates it's properties via a couple of calls to a web service in it's constructor. ...
7
votes
1answer
2k views

Constructors and inheritance in Groovy

I am new to Groovy and I am having a little problem with constructors of subclasses. Basically, I have a base abstract class like ...
0
votes
2answers
86 views

May be a memory leak somewhere or allocated memory not freed? [closed]

Here is the entire program, please help me, I've tried everything to find out what exactly is going with the memory. The problem is everything runs perfectly, but there are some extra characters ...
2
votes
1answer
119 views

Assign local-variables in constructor

How to make this code in constructor more DRY? Is there some more concise way to assign variables passed through object? ...
3
votes
1answer
204 views

How could this constructor code be improved?

How could this constructor code be improved? I feel like I'm not doing something optimally here... ...
1
vote
1answer
155 views

“metaconstructors” for inheritance in js?

Edit - decl smokes dojo.declare - http://jsperf.com/dojo-declare-vs-decl The code has been updated a bit. ...
3
votes
2answers
6k views

MySQL database connection in the constructor

I'm an absolute beginner in PHP OOP in search of the "Holy Grail" of connecting to MySQL database once and reusing this connection for the whole site. classes/db.php ...
6
votes
6answers
2k views

Constructors - lots of paramters or none and use of set methods

In your opinion what is the best way to construct an object given the two examples below: Option 1: Lots of parameters ...
1
vote
2answers
323 views

How to improve this basic bit of PHP code

How to improve: ...
7
votes
1answer
2k views

Workaround for overloaded constructor in PHP

I have a class whose purpose is to display a comment. I'd like to be able to instantiate it by passing a Comment object if I happen to have it available, or just ...
8
votes
6answers
404 views

Arguments in constructors matching fields

What is your opinion in arguments in constructors matching members as in the following example ...
28
votes
6answers
1k views

Instantiating objects with many attributes

I have a class with quite a few attributes, most of which are known when I create an instance of the object. So I pass all the values in the constructor: ...
21
votes
5answers
5k views

Database connection in constructor and destructor

I am playing with different ways to do database interaction in PHP, and one of the ideas I have been playing with is connecting to the DB in the constructor and disconnecting in the destructor. This ...