Creating an array of unique elements

[sybrandy]

I've done something like this before using associative arrays.  I would 
rely on the fact that the keys have to be unique to produce my unique 
array.  So, in this case, any value you want to store you would save 
like this:

array[value] = 1;

Regardless of whether or not the value already exists, this will work 
and ensure uniqueness of the keys.  To determine if a value is already 
part of the array, you can check for the key like this:

if (value in array)

You can later get the values like this:

values = array.keys;

Not sure if this will do everything you want, but it seems to be cleaner 
than having to ensure an array is unique after every insertion.

Casey