Storing values in memory is straightforward, but when it comes to objects, I'm curious about how exactly they are stored. Can you explain this process?
Storing values in memory is straightforward, but when it comes to objects, I'm curious about how exactly they are stored. Can you explain this process?
Exploring how objects are stored in memory can provide valuable insights:
Typically, most objects store all their properties within a single memory block ("a" and "b"). Each memory block includes a pointer to a map that outlines the object's structure. Any named properties that exceed the object's limit are usually placed in an overflow array ("c" and "d"). Numbered properties, on the other hand, are often stored separately in a continuous array.
To delve deeper into this topic, check out this resource.
When an object is created, the values of its member variables are stored in memory. These values are linked to the class that the object belongs to, forming a cohesive unit with the associated code block. Essentially, an object comprises data along with specific function calls tailored to manipulate it.
Take for example a language like C which is based on functions. Consider the following structure:
struct Square (
int upperX;
int upperY;
int lowerX;
int lowerY;
}
In this case, we are storing information about a square in memory...
Square s = malloc(sizeof(Square));
s->upperX = 10;
s->upperY = 10;
s->lowerX = 20;
s->lowerY = 20;
The above code snippet demonstrates operations carried out on a Square object. It leverages the memory allocated to hold the Square struct...
Square's representation in memory is straightforward with its corresponding values.
Now, in an object-oriented language such as C++ or Java, the implementation may look slightly different while achieving the same result. For instance:
class Square {
private int upperX;
private int upperY;
private int lowerX;
private int lowerY;
public Square(int x1, int y1, int x2, int y2) { /* code to assign values to members */ }
public draw() { /* code to draw...*/ }
}
An object can be instantiated like so:
Square s = new Square(10, 10, 20, 20);
Behind the scenes, the allocation and assignment processes occur, but now 's' represents an object because the actual Square "struct" in memory is tied to the logic within the Square class.
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