From: Justin Collins <justincollins@...>
Date: 2009-02-24T21:07:23+09:00
Subject: Re: Objects put into a declared array

Dave Lilley wrote:
> Hi I've got this misunderstanding of how to use arrays and objects
> stored there in (note I'm actually using Shoes if this has any bearing
> on my problem).
>
> below is a bit of code i've written that creates an array of 25 places.
>          @myarray = Array(1..25)
>   

This is not necessary, the array will grow as you add things to it. 
Given the code you have shown, you can just as well do:

@myarray = []

> I then want to "install" a bona fide object like a shape into each 25
> places.
> so i do this...
>       1.upto @myarray.length do |p|
>   

Remember, Ruby arrays are 0-based, so you array of 25 items is indexed 0 
to 24. Using 'p' as a variable name is not recommended, because 'p' is 
also a built-in method.

Also, a more common way to do this (and noticing the array is now empty 
if defined as above) would be

(0..25).each do |p|

>          @myarray[p] = oval(0,0,20,20)
>          @myarray[p].move = x,y
>   

I think you mean to do

@myarray[p].move x, y

> note: x & y being defined else where so each shape is visable on screen
>
> or can it be @myarray[p] = oval(0,0,20,20).move x,y?
>   

This would work, too, though you may need to do

@myarray[p] = oval(0,0,20,20).move(x,y)


-Justin