Structure Vs Class in C#

When you create an instance of a class with the new operator, memory gets allocated on the heap. When you create an instance of a struct with the new operator where does the memory get allocated, on the heap or on the stack ?

Static classes in PHP via abstract keyword?

According to the PHP manual , a class like this:

abstract class Example {}

Does initiating a large class on a page slow it down?

I am in the process of writing a class that will probably end up being around 3000 lines of code.

what"s the point of declaring static functions in PHP?

So in PHP you can have

Class A{

   function B(){}

}

Objective C create new class which is an image?

Sorry I'm new to Objective C and OOP, and I'm trying to understand how to use classes. I have searched everywhere but can't find a clear answer.

Does using method chaining in PHP cause any problems with resources or memory?

I'm talking about methods like this:

Multiple object selection with jQuery

I have a pretty basic jQuery question and forgive me if it has already been answered. Basically I attempt to have a link slide down a div. This is fairly simple however I require multiple links sliding down their respective divs. I understand I can just name the links and divs unique classes and solve the problem that way, however this naturally also requires a duplication of the jQuery code for each link-div and i have a lot. I therefore need a general script. A simplified version of my situation is as follows:

Common Code for Activity and PreferenceActivity

I'm using common code in my Activity like this:

Calling a Class function without using $this->function_name() — PHP --

So I have this class:

class A{

      public function do_a(){ return 'a_done';};



      public function do_b(){ return 'b_done';};

}