The underlying data structure of Space is an associate array, like in PHP.

So Space objects are both hash tables and arrays. For example say you had a variable named account with the space value:

    charges
     coffee $2.12
     soda $1.21
     cupcake $2.50

You could access the individual elements of this object like you would a hash table:

     account.get('charges soda')
     // Returns $1.21
 

Or like an array:

     account.get('charges').get(1)
     // Returns $1.21