A special type of subroutine called at the creation of an object.
7
votes
2answers
77 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
102 views
Alternate initializer pattern in Python [closed]
from collections import namedtuple
import functools
import unittest
# The following example is contrived and over-simplified.
class Vehicle(object):
def __init__(self, name, passengers):
...
1
vote
1answer
38 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
54 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...
function ...
1
vote
2answers
95 views
Improve testability of constructor
I have the following constructor
/**
* @param codePath path to player's code. If ends in '/' it assumes the code is in .class'es in
* a directory; otherwise assumes a jar
* @throws ...
1
vote
3answers
108 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 String.cpp. I would like these to be ...
4
votes
5answers
112 views
Reference type and constructors
Code in Java but should be readable also for c#...
Let's assume I have a class with some reference types. Example:
class MyClass {
private int uniqueId;
private double doubleValue;
private ...
0
votes
1answer
106 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
69 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?
public class PlacementLocation
{
public int Row { get; set; ...
1
vote
1answer
63 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
145 views
Constructor Chaining in Java
When creating multiple constructors, I usually do the following;
public ConstructorName(int count)
{
this(count, 0);
}
public ConstructorName(String count)
{
this(Integer.parseInt(count), ...
1
vote
2answers
191 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 Application class can create an instance of your object. Once the instance ...
2
votes
2answers
450 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 corresponding one using init?
For example:
...
1
vote
1answer
73 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 constructors depending on file format. Currently i do it like that.
def ...
1
vote
2answers
59 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:
pyglet.clock.set_default(self)
Who changes the state ...
1
vote
1answer
132 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
124 views
Python: How much logic is enough logic, and how much is too much logic in an __init__ method?
I am writing an email parser and cannot decide how much logic should be included in the __init__ function. I know, a constructor should make the object ready for use, but are there best practices to ...
0
votes
2answers
439 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. After extracting a few value objects, there are still 12 arguments left, ...
5
votes
3answers
226 views
Calling functions (or invoking methods) in constructor
I had written something like the following,
public class ClassName {
//private instance variables
public ClassName() {
//initialize instance variables
this.someFunction();
}
public void ...
2
votes
3answers
569 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.
public class ...
1
vote
2answers
128 views
Get resources inside or outside constructor?
I need your opinion on writing a constructor that's clean code and unit test friendly.
Option 1 :
var res1 = bigObject.GetResource1();
var res2 = bigObject.GetResource2();
var res3 = ...
6
votes
1answer
1k 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
class BaseClass {
def BaseClass(Map options) {
// Does ...
0
votes
2answers
82 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
108 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?
class Ball
constructor: (args) ->
@name = args.name
@x = ...
3
votes
1answer
183 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...
@interface JGProduct : NSObject {
NSString *identifier;
}
+(JGProduct ...
1
vote
1answer
141 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. decl now accepts object literals as well, although I still like "declaration functions" ...
3
votes
2answers
3k views
MySQL database connection in the constructor
I'm an absolute beginner on PHP OOP in search of the "Holy Graal" of connecting to MySQL database once and reuse this connection for the whole site
So far, I've created these files:
classes/db.php
...
13
votes
2answers
4k views
Styles: “object initializer” vs “constructor” object creation
Question: What are peoples preferences between the two methods of creating an object (in C# in particular) and setting other fields (that may not be given values during construction)? Are either of ...
5
votes
6answers
1k 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
private string firstname;
private string surname;
private Address homeAddress;
...
2
votes
2answers
315 views
How to improve this basic bit of PHP code
How to improve:
class gotClass {
protected $field1;
protected $Field2;
protected $field3;
(...)
function __construct($arg1, $arg2, $arg3, $arg4) {
$this->field1 = ...
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 the values if that's what I have ...
8
votes
6answers
386 views
Arguments in constructors matching fields
What is your opinion in arguments in constructors matching members as in the following example
public Join(final int parent, final TIntHashSet children) {
this.parent = parent;
this.children = ...
25
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:
$op = new OpenIdProvider($imgPath . $name . ...
19
votes
5answers
4k 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 ...
