Objects

Projects Programming
1

In most programming languages you have terms such as array and object.

The main difference is how one addresses an array (as an associative) access method and an object (as a property) method.

How does I express an object or a collection of object, for example if I want to group some elements together like...

Using JavaScript as an example...

 obj = new Object();
obj.collection = new Array();
obj.collection[0] = new Object();
obj.collection[0].position = new Object();
obj.collection[0].position.left = 100;
obj.collection[0].position.right = 1000;
obj.collection[0].position.bottom = 1000;
obj.collection[0].position.top = 100;
obj.collection[0].position.status = ""; // empty string
obj.collection[0].display.style = "hand";

obj.collection[1] = new Object();
obj.collection[1].position = new Object();
obj.collection[1].position.left = 45;
...

How would I be able to express data like that which is a collection of objects or could be a collection of objects and arrays?

2

For that you want struct

3

Like majenko says, a struct or class can be used to create complex structures.

struct Rect{
  int left, top, right, bottom;
};

struct Foo{
  Rect position;
  char status[ 10 ];
  char style[ 10 ];
};

Foo objects[] = {
  { { 0, 0, 10, 10 }, "status0", "style0" },
  { { 20, 20, 30, 30 }, "status1", "style1" },
};