From: "Jan E." <jan.e@...>
Date: 2012-03-17T07:34:07+09:00
Subject: Re: I don't understand arrays as objects of a bigger array

Hi,

Actually, this isn't even a special syntax. It's just two subsequent 
method calls:

(world[5])[5]

You call the [] method on world. This returns the 6th element von world, 
which is an array. And on this array you again call the [] method.

It works exactly like any other method chain:

str = "abc"
puts str.reverse.upcase

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