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Two-dimensional array

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Using the Array::new constructor, your can initialize an array with a given size and a new array in each of its slots. The inner arrays can also be given a size and and initial value.

For instance, to create a 3x4 array of zeros: 

array = Array.new(3) { Array.new(4) { 0 } }

The array generated above looks like this when printed with p: 

[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]

You can read or write to elements like this: 

x = array[0][1]
array[2][3] = 2
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Arrays:
* Arrays
* Create Array of Strings
* Create Array with Array new
* Create Array of Symbols
* Manipulating Array Elements
* Accessing elements
* Creating an Array with the literal constructor
* Decomposition
* Arrays union intersection and difference
* Two-dimensional array
* Inject reduce
* Filtering arrays
* Arrays and the splat operator
* map
* Turn multi-dimensional array into a one-dimensional flattened array
* Get unique array elements
* Get all combinations permutations of an array
* Remove all nil elements from an array with compact
* Create an Array of consecutive numbers or letters
* Create Array of numbers
* Cast to Array from any object
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