Arrays of Arrays: Two-dimensional arrays

Initializing different types of arrays

We can specify any type while initializing arrays. For example, string:

$ irb
> Array.new(10, 'hello')
=> ["hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello"]

Or Boolean:

Note: Boolean type doesn’t exist in Ruby but, in this course, we intentionally refer to both theTrueClass and FalseClass types as Boolean.

$ irb
> Array.new(10, true)
=> [true, true, true, true, true, true, true, true, true, true]

Or integer:

$ irb
> Array.new(10, 123)
=> [123, 123, 123, 123, 123, 123, 123, 123, 123,

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