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to_a 

        # Array.to_a

(from ruby core)
---
    to_a -> self or new_array

---

When `self` is an instance of Array, returns `self`:
    a = [:foo, 'bar', 2]
    a.to_a # => [:foo, "bar", 2]

Otherwise, returns a new Array containing the elements of `self`:
    class MyArray < Array; end
    a = MyArray.new(['foo', 'bar', 'two'])
    a.instance_of?(Array) # => false
    a.kind_of?(Array) # => true
    a1 = a.to_a
    a1 # => ["foo", "bar", "two"]
    a1.class # => Array # Not MyArray

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