A special type of subroutine called at the creation of an object.
1
vote
0answers
12 views
Find Or Create Rails Nested Attribute By Name
I have a Model called Example that accepts_nested_attributes_for NestedExample.
When I create a new Example Model I can also create NestedExamples:
params = { :name => 'Example 1', ...
2
votes
4answers
63 views
Inherit constructor
I have a class named myGraph which is derived from graph
If I know the number of vertices when I call the constructor, I will be able to use the following constructor.
myGraph(int numOfV) : ...
0
votes
4answers
74 views
Constructor parameter style
Lets say my file looks like this:
#include <iostream>
#include <string>
using namespace std;
class testclass{
public: string name;
//testclass(const string& sref){
...
0
votes
2answers
41 views
OOP, dependency injections and constructors
I'm trying to design some classes that requires use of an outside object. The outside object is from a third party library.
Example in psudocode
Class A {
protected $foo
public function ...
0
votes
1answer
9 views
bezier curve getting overwritten by using constructor?
I am trying to create 9 hairs(hair=a bezier curve on canvas),but I am doing this with a twist(twist=by using constructor).I am creating 9 such instances,where each instance draws one hair.When I do ...
7
votes
2answers
100 views
Are user-defined default constructors less efficient?
Some days ago, while reading Standard C++ news I've read the post about Defaulted functions in C++11, in that article is mentioned that the user-defined constructor is less efficient than the one ...
0
votes
4answers
59 views
Creating new object with constructor
The following code, when compiled and run gives the output as "alpha subsub".
SubSubAlpha(); constructor should add "subsub " to variable s and that should be the output.
How come the output is " ...
1
vote
1answer
26 views
How do I load a model method into a controller constructor in CodeIgniter?
I am trying to extend the CI_Controller class to load my global page header file so I don't have to load it at the beginning of every single controller method. It doesn't seem to be working. I know ...
2
votes
2answers
53 views
BlueJ 2d Dimensional Array
For my class assignment we need to Write a class called Matrix that contains a private 2-dimensional int array called 'matrix' that can be up to 10 rows by 10 columns maximum. We need to use two ...
1
vote
1answer
32 views
C# declaring array in class with not constant type variable through constructor
I'm not sure if the title is clear so, I'm declaring an array in class, but the problem is that when I want to create a class the size of array might be different and by that I want to tell the size ...
1
vote
2answers
41 views
How does the concept of a class change when passing data to the constructor instead of method parameters? [closed]
Let's say we're making a parser. One implementation could be:
public sealed class Parser1
{
public string Parse(string text)
{
...
}
}
Or we could pass the text to the ...
-7
votes
0answers
56 views
Sequence of constructor calls [closed]
public class B{
}
public class A extends B{
public A(){
this(A(1));
}
public A(int i){
System.out.println(i);
}
}
public class C{
A obj = new A();
}
What is the sequence of the ...
0
votes
1answer
37 views
Calling parent constructor within child class
Can anyone explain me why this code is working?
<?php
class iParent
{
private $device;
private $browser;
public function __construct()
{
$this->device = 'iPad';
...
3
votes
2answers
34 views
Creating a globally accessible MySQLi object
I have multiple classes that use static methods. These functions connect to the database using
$mysqli = new mysqli(DB_SERVER, DB_USER, DB_PASS, DB_NAME);
where the constants DB_SERVER, DB_USER, ...
0
votes
1answer
31 views
Constructor executes but members still null?
I'd like to use a constructor to establish objects for my class. The problem is that the constructor executes properly (stepped over each assignment within the constructor in the Visual Studio ...
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