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Classes vs multi-dimensional arrays

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  #1  
Old June 15th, 2002, 01:36 PM
Maarten Maarten is offline
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Classes vs multi-dimensional arrays
To be honest, i've never really used classes in my code... That's because i don't always see the use of them...
I think with multi-dimensional arrays you can accomplish the same.
So can anyone tell me of a script that can only be made with the use of classes? So i can see the use of them
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  #2  
Old June 15th, 2002, 03:00 PM
Matt Matt is offline
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RE: Classes vs multi-dimensional arrays
Well, a class is alot different from an array. The major difference is that a class has functions in it as well as data. From the PHP manual:
Quote:
A class is a collection of variables and functions working with these variables.


Here is a small sample class you can look at to see the basic functionality of one:
php Code:
Original - php Code 
  1. <?
  2.  
  3. class RandomNumber {
  4.     
  5.   var $number;
  6.     
  7.   function make_seed() {
  8.     list($usec, $sec) = explode(' ', microtime());
  9.     return (float) $sec + ((float) $usec * 100000);
  10.   } 
  11.     
  12.   function generate ($min = 1, $max = 10) {
  13.     
  14.     srand($this->make_seed());
  15.     
  16.     $this->number = rand($min,$max);
  17.   }
  18. }
  19.  
  20. $num = new RandomNumber();
  21. $num->generate();
  22. echo $num->number;
  23. echo "<BR>n";
  24. $num->generate(60,100);
  25. echo $num->number;
  26.  
  27. ?>


Hope that helps a bit...
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  #3  
Old June 15th, 2002, 04:33 PM
Maarten Maarten is offline
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RE: Classes vs multi-dimensional arrays
Thanks for the sample...

I know (mostly) how classes work. But i see other people use classes where i use a structure of arrays and for-loops.
For instance with the current contest. I'm sure a lot of people use classes to define the coördinates of each 'cell' in the maze.
I use an multi-dim array like this to store my coordinates:
$coords[$maze_num][$ypos][$xpos].
And it works perfectly.
The only problem i can see is that other people won't understand my code easily, because it's less structured
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  #4  
Old June 15th, 2002, 04:50 PM
notepad notepad is offline
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RE: Classes vs multi-dimensional arrays
i'm all about arrays as well..
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  #5  
Old June 15th, 2002, 10:06 PM
CmdrDats CmdrDats is offline
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RE: Classes vs multi-dimensional arrays
Same here. Classes get far too messy way too fast imho. But i actually want to see if i can incorporate classes into my thinking structure.. maybe it has some use.. ;)
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Old June 15th, 2002, 11:08 PM
Maarten Maarten is offline
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RE: RE: Classes vs multi-dimensional arrays
Quote:
But i actually want to see if i can incorporate classes into my thinking structure.. maybe it has some use.. ;)

Yeah, that's also what i'm trying to do... That's why i'm asking to think of a script/program that can only be done with classes...
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Old June 16th, 2002, 11:04 PM
greggory greggory is offline
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RE: RE: Classes vs multi-dimensional arrays

Quote:
The only problem i can see is that other people won't understand my code easily, because it's less structured


That's what I used to think, but in a couple of months, if you need to re-do sthg you did in a messy manner, you'll probably have forgotten how it works if it's not well structurated. That's also why everybody *needs* to comment is code
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  #8  
Old June 17th, 2002, 01:41 AM
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RE: Classes vs multi-dimensional arrays
I don't think it's possible to have a problem that can only be solved with classes. Classes may make some problems eaiser to think about and eaiser to code, but there are many ways to skin a cat.

Commenting code is important, but I think good, clear abstraction is more important. And usually, classes help clarify your levels of abstraction.
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